JP2013155137A

JP2013155137A - Aqueous suspended agrochemical preparation with improved spraying property and adhesive property

Info

Publication number: JP2013155137A
Application number: JP2012017215A
Authority: JP
Inventors: Hiroshi Kakizaki; 洋蛎崎; Masaki Akiyama; 正樹秋山; Yuichi Kurotsu; 裕一黒津; Yoshihiko Nabeya; 佳彦鍋谷
Original assignee: Hokko Chemical Industry Co Ltd
Current assignee: Hokko Chemical Industry Co Ltd
Priority date: 2012-01-30
Filing date: 2012-01-30
Publication date: 2013-08-15
Anticipated expiration: 2032-01-30
Also published as: JP5919006B2

Abstract

PROBLEM TO BE SOLVED: To provide an aqueous suspended agrochemical preparation with a long spraying distance from a pressure accumulation type sprayer, which can spread an active component uniformly on a large area of a paddy field even when the aqueous suspended agrochemical preparation is sprayed from a ridge and which can drop the spread agent into the paddy field without a loss because the agent hardly adheres to a rice plant.SOLUTION: An aqueous suspended agrochemical preparation contains agrochemical active ingredient, protective colloidal agent, thickener, and water, of which viscosity with a shear rate of 5,000-10,000 (l/s) at 20°C is 5-50 mPa s.

Description

本発明は、蓄圧式散布機からの散布飛距離が長く、薬剤が稲体へ付着しにくいため散布された薬剤が水田中にロスなく投下され、かつ水田中へ農薬活性成分が速やかに拡散する水性懸濁農薬製剤、およびその水性懸濁農薬製剤の原液を湛水下水田に直接散布する散布方法に関する。 In the present invention, since the spraying distance from the pressure accumulating spreader is long and the drug is difficult to adhere to the rice plant, the sprayed drug is dropped into the paddy field without loss, and the agricultural chemical active ingredient diffuses quickly into the paddy field. The present invention relates to an aqueous suspension pesticide preparation and a spraying method in which a stock solution of the aqueous suspension pesticide preparation is sprayed directly on a flooded sewage paddy field.

湛水下水田への水性懸濁農薬製剤の散布方法としては、田植え機に装着した散布装置から田植えと同時に水性懸濁農薬製剤を水田中に滴下する方法、水性懸濁農薬製剤の入った容器を畦畔から手振りすることで水田中に散布する方法などがある。しかし、田植え機に装着した散布装置から水性懸濁農薬製剤を水田中に滴下する方法は、田植え前、あるいは田植え後に散布する薬剤には不適であり、また、容器を畦畔から手振りすることで散布する方法は、水性懸濁農薬製剤の畦畔からの散布飛距離が短く、例えば短辺３０ｍ以上の面積の大きい水田へ処理する場合には、水田中に有効成分が均一に拡散しきれないため、水田中に入り込んで手振り散布しなければならないという問題がある。 As a method of spraying an aqueous suspension pesticide formulation to a flooded sewage paddy, a method of dropping an aqueous suspension pesticide formulation into a paddy field at the same time as rice planting from a spraying device attached to a rice planting machine, a container containing an aqueous suspension pesticide formulation There is a method to spread it in the paddy field by shaking from the shore. However, the method of dripping the aqueous suspension pesticide formulation into the paddy field from the spraying device attached to the rice planting machine is not suitable for drugs to be sprayed before or after rice planting, and by shaking the container from the shore. The spraying method is such that the spraying distance from the shore of the aqueous suspension pesticide preparation is short. For example, when processing to a paddy field with a short side of 30 m or more, the active ingredient cannot be uniformly diffused in the paddy field. Therefore, there is a problem that it is necessary to enter the paddy field and spray it by hand.

そこで、必ずしも田植えと同時に処理する必要がなく、面積の大きい水田に処理する場合でも水田中に有効成分を均一に拡散させることができる方法として、φ１〜２ｍｍ程度の口径を有するノズルを装着した蓄圧式散布機を用いて散布する方法が提案されている。この方法は、畦畔からの水性懸濁農薬製剤の散布飛距離を手振り散布に比べ長くすることができるため、水田中に有効成分を拡散させやすくなる。 Therefore, it is not always necessary to treat at the same time as rice planting, and as a method for uniformly diffusing the active ingredient in the paddy field even when treating in a large area, pressure accumulation with a nozzle having a diameter of about φ1 to 2 mm is installed. There has been proposed a method of spraying using a spray spreader. This method makes it possible to make the spraying distance of the aqueous suspension pesticide preparation from the shore side longer than that by hand-shaking, so that the active ingredient is easily diffused in the paddy field.

このような蓄圧式散布機を用いて水性懸濁農薬製剤を散布する技術としては、濃厚な液体農薬を水田の代掻時から田植え後の水稲の幼苗期に、薬液ボトルとφ０．５〜３ｍｍ程度のノズルが装着された水テッポウ型散布機により散布する方法（特許文献１参照）、水和剤もしくは顆粒水和剤を水に懸濁させた形態、フロアブル形態または乳剤形態の水稲用液状農薬を直射的に湛水下水田へ散布する方法（特許文献２参照）、除草活性成分と水を必須成分として含有する除草剤フロアブルを、原液またはこれを水で希釈して耐圧容器に入れて１〜５ｋｇ／ｃｍ^３で加圧し、φ１〜２ｍｍの細孔を有するノズルを用いて散布することを特徴とする、湛水田における除草剤フロアブルの散布方法（特許文献３参照）があげられる。 As a technique for spraying an aqueous suspension pesticide formulation using such a pressure accumulating spreader, a concentrated liquid pesticide is used from the time of paddy field to the seedling stage of paddy rice after planting, and a chemical solution bottle and φ0.5-3mm A method of spraying with a water tipper type sprayer equipped with a nozzle of a degree (see Patent Document 1), a liquid pesticide for paddy rice in a form in which a wettable powder or granular wettable powder is suspended in water, a flowable form or an emulsion form Directly sprayed to flooded sewage paddy field (see Patent Document 2), herbicide flowable containing herbicidal active ingredient and water as essential ingredients, diluted with stock solution or water and placed in a pressure-resistant container 1 There is a herbicide flowable spraying method (see Patent Document 3) in a paddy paddy field characterized by pressurizing at ~ ⁵ kg / cm ³ and spraying using a nozzle having pores of φ1 to 2 mm.

しかしながら、これらの散布方法での水性懸濁農薬製剤の散布飛距離は、散布される水性懸濁農薬製剤の種類に左右され、水性懸濁農薬製剤の種類によっては散布飛距離が短いなどの問題が発生する。特許文献３については、フロアブル原液の粘度についても１０〜８００ｍＰａ・ｓの範囲との記載があるが、ずり速度との関係は明らかでなく、また、耐圧容器内の圧力は１〜５ｋｇ／ｃｍ^２（約０．１〜０．５Ｍｐａ）とする必要があり、散布容器内の圧力が低くなると散布飛距離が短くなるため、容器内圧力を高く維持するために頻繁にポンプを作動させる必要があるなどの問題がある。 However, the spraying distance of aqueous suspension pesticide formulations in these spraying methods depends on the type of aqueous suspension pesticide formulation to be sprayed, and depending on the type of aqueous suspension pesticide formulation, there are problems such as short spraying distance Will occur. Regarding Patent Document 3, there is a description that the viscosity of the flowable stock solution is in the range of 10 to 800 mPa · s, but the relationship with the shear rate is not clear, and the pressure in the pressure vessel is 1 to 5 kg / cm ^2. (About 0.1 to 0.5 Mpa), and when the pressure in the spraying container is low, the spraying distance is shortened. Therefore, it is necessary to operate the pump frequently in order to keep the container pressure high. There are problems such as.

一方で、水田中への有効成分の速やかな拡散あるいは包装容器からの水性懸濁農薬製剤の良好な吐出性のために、製剤粘度についても種々の検討がなされおり、特定の農薬活性成分を含有し粘度２５０〜３０センチポイズ（ずり速度３８．４０ｓｅｃ^−１・２０℃）となる物性を有することを特徴とする水田用懸濁状除草剤組成物（特許文献４、５参照）、農薬活性成分、増粘剤等よりなり、２０℃における粘度が２００〜１０００ｍＰａ・ｓであり、かつＳＶＩ値が２〜１０である水性懸濁農薬製剤を非透水性紙製の成形容器に充してなることを特徴とする水性懸濁農薬製剤包装物、および包装物に設けた細孔より水性懸濁農薬製剤を直接湛水下水田に滴下することを特徴とする散布方法（特許文献６、７参照）が提案されている。
しかしながら、これらの製剤粘度に関する技術は、蓄圧式散布機からの散布飛距離を想定したものではなく、粘度測定時のずり速度も０〜３８．４０ｓｅｃ^−１であり、湛水中への水性懸濁農薬製剤の速やかな分散や成型容器からの吐出量の均一性を改良したものである。 On the other hand, for the rapid diffusion of active ingredients into paddy fields or the good dischargeability of aqueous suspension pesticide preparations from packaging containers, various investigations have been conducted on the viscosity of the preparations, which contain specific agrochemical active ingredients. Suspension herbicide composition for paddy fields (see Patent Documents 4 and 5), a pesticide active ingredient, having a physical property of a viscosity of 250 to 30 centipoise (shear rate 38.40 sec ⁻¹ · 20 ° C.), It is composed of a thickener or the like, and is filled with an aqueous suspension agricultural chemical preparation having a viscosity at 20 ° C. of 200 to 1000 mPa · s and an SVI value of 2 to 10 in a non-permeable paper-made molding container. An aqueous suspension pesticide preparation package characterized by the above, and a spraying method (see Patent Documents 6 and 7) characterized in that the aqueous suspension pesticide preparation is dropped directly into the flooded sewage paddy through the pores provided in the package. Proposed.
However, these technologies relating to the viscosity of the preparation do not assume the scattering distance from the pressure accumulator, and the shear rate at the time of viscosity measurement is 0 to 38.40 sec ^−1. It improves the rapid dispersion of the agricultural chemical formulation and the uniformity of the discharge rate from the molded container.

また、水性懸濁農薬製剤の水稲への付着性の改良（付着しにくくする）についても種々の検討がなされており、除草活性成分、保護コロイド剤（ポリビニルアルコール、水溶性セルロースエーテルなど）、水よりなることを特徴とする湛水下水田の直接散布用水性懸濁農薬製剤（特許文献８〜１２参照）が提案されている。
しかしながら、これらの技術は薬剤が稲体へ付着しにくくすることはできるが、蓄圧式散布機からの散布飛距離は考慮されておらず、面積の大きい水田へ処理する場合には、水田中に農薬活性成分が均一に拡散しきれないなどの問題がある。 Various studies have also been made on improving the adhesion of aqueous suspension pesticide preparations to paddy rice (to make it difficult to adhere). Herbicidal active ingredients, protective colloids (polyvinyl alcohol, water-soluble cellulose ether, etc.), water An aqueous suspension pesticide preparation for direct spraying of flooded sewage paddy fields (see Patent Documents 8 to 12) is proposed.
However, these technologies can make it difficult for the chemicals to adhere to the rice plant, but the scattering distance from the accumulator is not taken into account. There are problems such as active ingredients of agricultural chemicals not being able to diffuse uniformly.

特開平６−５４６３８号公報JP-A-6-54638 特開平１０−１１７６５９号公報Japanese Patent Laid-Open No. 10-117659 特開平１１−１６９０５５号公報JP-A-11-169055 特開昭６２−８４００２号公報JP-A-62-84002 特開昭６２−８４００３号公報JP 62-84003 A 特開平１０−３１６５０１号公報JP-A-10-316501 特開平１０−３１６５０２号公報Japanese Patent Laid-Open No. 10-316502 特開平１０−２５１１０７号公報JP-A-10-251107 特開平１０−３１６５０３号公報Japanese Patent Laid-Open No. 10-316503 特開平１１−１５８００６号公報Japanese Patent Laid-Open No. 11-158006 特開平１０−２８７５０３号公報JP-A-10-287503 特開２００４−２６８４５号公報JP 2004-26845 A

本発明は、蓄圧式散布機からの散布飛距離が長く、畦畔から水性懸濁農薬製剤を散布した場合でも面積の大きい水田に有効成分を均一に拡散させることができ、かつ薬剤が稲体へ付着しにくいため散布された薬剤を水田中にロスなく投下させることができる水性懸濁農薬製剤を提供することにある。 The present invention has a long spraying distance from the pressure accumulating spreader, and even when an aqueous suspension pesticide preparation is sprayed from the shore, the active ingredient can be uniformly diffused in a large paddy field, and the drug is rice It is an object to provide an aqueous suspension pesticide preparation that can be sprayed into a paddy field without loss because it is difficult to adhere to the paddy field.

本発明者らは、上記課題について鋭意検討し、農薬活性成分、保護コロイド剤、増粘剤および水を含有し、ずり速度５０００〜１００００（１／ｓ）における２０℃の粘度が５〜５０ｍＰａ・ｓであることを特徴とする水性懸濁農薬製剤が、蓄圧式散布機からの散布飛距離が長く、良好な拡散性を維持しつつ、かつ薬剤が稲体へ付着しにくくなることを見い出し、本発明を完成するに至った。 The inventors of the present invention diligently studied the above-mentioned problems, containing an agrochemical active ingredient, a protective colloid agent, a thickener and water, and having a viscosity at 20 ° C. of 5 to 50 mPa · s at a shear rate of 5,000 to 10,000 (1 / s). The aqueous suspension pesticide formulation characterized by s is found to have a long spray distance from the pressure accumulator, maintain good diffusivity, and make it difficult for the drug to adhere to the rice plant, The present invention has been completed.

すなわち、本発明を要約すると次のようになる。
〔１〕農薬活性成分、保護コロイド剤（製剤１００重量部中に０．０５〜１０．０重量部）、増粘剤および水を含有し、ずり速度５０００〜１００００（１／ｓ）における２０℃の粘度が５〜５０ｍＰａ・ｓであることを特徴とする、水性懸濁農薬製剤。
〔２〕農薬活性成分、保護コロイド剤（製剤１００重量部中に０．０５〜１０．０重量部）、増粘剤および水を含有し、ずり速度５０００〜１００００（１／ｓ）における２０℃の粘度を５〜５０ｍＰａ・ｓに調製する工程を有することを特徴とする、水性懸濁農薬製剤。
〔３〕保護コロイド剤がポリビニルアルコールまたは水溶性セルロースエーテルであることを特徴とする、〔１〕または〔２〕に記載の水性懸濁農薬製剤。
〔４〕〔１〕〜〔３〕のいずれかに記載の水性懸濁農薬製剤の原液を、蓄圧式散布機を使用して湛水下水田に直接散布することを特徴とする、散布方法。 That is, the present invention is summarized as follows.
[1] Agrochemical active ingredient, protective colloid agent (0.05 to 10.0 parts by weight in 100 parts by weight of preparation), thickener and water, 20 ° C. at shear rate of 5,000 to 10,000 (1 / s) An aqueous suspension pesticide preparation characterized by having a viscosity of 5 to 50 mPa · s.
[2] Agrochemical active ingredient, protective colloid agent (0.05 to 10.0 parts by weight in 100 parts by weight of formulation), thickener and water, 20 ° C. at shear rate of 5,000 to 10,000 (1 / s) An aqueous suspension pesticide preparation characterized by having a step of adjusting the viscosity of to 5 to 50 mPa · s.
[3] The aqueous suspension pesticide preparation according to [1] or [2], wherein the protective colloid agent is polyvinyl alcohol or a water-soluble cellulose ether.
[4] A spraying method comprising spraying the stock solution of the aqueous suspension pesticide preparation according to any one of [1] to [3] directly to a flooded sewage paddy field using a pressure accumulator.

本発明の水性懸濁農薬製剤は、蓄圧式散布機内の圧力が０．１０Ｍｐａ以下の低圧であっても散布飛距離が長く、畦畔から水性懸濁農薬製剤を散布した場合でも、面積の大きい水田に有効成分を均一に拡散させることができ、かつ薬剤が稲体へ付着しにくいため散布された薬剤を水田中にロスなく投下させることができる。 The aqueous suspension pesticide preparation of the present invention has a long spraying distance even when the pressure in the pressure accumulator spreader is 0.10 Mpa or less, and has a large area even when the aqueous suspension pesticide preparation is sprayed from the shore. The active ingredient can be uniformly diffused in the paddy field, and the sprayed drug can be dropped into the paddy field without any loss because the drug hardly adheres to the rice.

したがって、蓄圧式散布機内の圧力が低い場合であっても一定の散布飛距離を維持できるため、高齢者や女性でも容易に蓄圧式散布機を加圧させ作業することが可能であり、散布中に蓄圧式散布機内の圧力が多少低下しても散布飛距離は維持できるため、散布作業中に蓄圧式散布機を加圧する回数も低減できる。 Therefore, even if the pressure in the pressure accumulator spreader is low, it is possible to maintain a constant spray distance, so that elderly people and women can easily pressurize and operate the pressure accumulator. Even if the pressure in the pressure accumulator spreader drops somewhat, the spray distance can be maintained, so the number of times the pressure accumulator spreader is pressurized during the spraying operation can also be reduced.

以下、本発明の水性懸濁農薬製剤について詳細に説明する。本発明の水性懸濁農薬製剤を構成する成分、製剤の調製方法、製剤の使用態様などは以下のとおりである。 Hereinafter, the aqueous suspension pesticide preparation of the present invention will be described in detail. The components constituting the aqueous suspension pesticide preparation of the present invention, the preparation method of the preparation, the use mode of the preparation and the like are as follows.

＜構成成分＞
（１）農薬活性成分
本発明で使用できる農薬活性成分は、殺虫剤、殺菌剤、除草剤、植物成長調節剤などの一般に農薬の活性成分として使用されるものであればよい。また、農薬活性成分を２種以上併用しても何らかまわない。このような農薬活性成分としては次のものが挙げられる。 <Constituents>
(1) Pesticide active ingredient The pesticide active ingredient which can be used by this invention should just be generally used as an active ingredient of an agrochemical, such as an insecticide, a fungicide, a herbicide, a plant growth regulator. Moreover, it does not matter even if two or more kinds of pesticidal active ingredients are used in combination. Examples of such agrochemical active ingredients include the following.

例えば、殺虫剤の例としては、有機リン系、カーバメート系、ネオニコチノイド系、ピレスロイド系、マクロライド系、クロロニコチニル系、ピリジンアゾメチン系、チオウレア系、オキサダイアジン系、フェニルピラゾール系、ネライストキシン系、ベンゾイルヒドラジド系およびベンゾイルフェニル尿素系の殺虫剤、天然殺虫剤、殺ダニ剤、生物農薬などが挙げられる。 Examples of insecticides include organophosphorus, carbamate, neonicotinoid, pyrethroid, macrolide, chloronicotinyl, pyridineazomethine, thiourea, oxadiazine, phenylpyrazole, Examples include pesticides, benzoylhydrazide and benzoylphenylurea insecticides, natural insecticides, acaricides, biopesticides and the like.

例えば、殺菌剤の例としては、無機銅類、有機銅類、無機硫黄剤、有機硫黄剤、有機リン系、フタリド系、ベンゾイミダゾール系、ジカルボキシイミド系、酸アミド系、トリアゾール系、イミダゾール系、メトキシアクリレート系、ストロビルリン系、アニリノピリミジン系、ジチオラン系、キノキサリン系、アミノピリミジン系、フェニルピロール系、トリアジン系、シアノアセトアミド系、グアニジン系、ヒドロキシアニリド系の殺菌剤、抗生物質系殺菌剤、天然物殺菌剤、生物農薬などが挙げられる。 For example, as an example of a disinfectant, inorganic copper, organic copper, inorganic sulfur agent, organic sulfur agent, organic phosphorus, phthalide, benzimidazole, dicarboximide, acid amide, triazole, imidazole , Methoxyacrylates, strobilurins, anilinopyrimidines, dithiolanes, quinoxalines, aminopyrimidines, phenylpyrroles, triazines, cyanoacetamides, guanidines, hydroxyanilides, antibiotics, Examples include natural product fungicides and biological pesticides.

例えば、除草剤の例としては、フェノキシ酸系、カーバメート系、酸アミド系、尿素系、スルホニルウレア系、ピリミジルオキシ安息香酸系、トリアジン系、ダイアジン系、ダイアゾール系、ビピリジリウム系、ジニトロアニリン系、芳香族カルボン酸系、脂肪酸系、アミノ酸系、ニトリル系、シクロヘキサンジオン系、フェニルフタルイミド系、有機リン系、シネオール系、インダンジオン系、ベンゾフラン系、トリアゾロピリミジン系、オキサジノン系、アリルトリアゾリノン系、イソウラゾール系、ピリミジニルチオフタリド系、トリケトン系、トリアゾリノン系、テトラゾリノン系、オキサゾリジンジオン系、無機除草剤、生物農薬などが挙げられる。
例えば、植物成長調節剤の例としては、エチレン剤、オーキシン剤、サイトカイニン剤、ジベレリン剤などが挙げられる。 For example, herbicides include phenoxy acid, carbamate, acid amide, urea, sulfonylurea, pyrimidyloxybenzoic acid, triazine, diazine, diazole, bipyridylium, dinitroaniline, aromatic carboxylic acid Acid, fatty acid, amino acid, nitrile, cyclohexanedione, phenylphthalimide, organophosphorus, cineole, indandione, benzofuran, triazolopyrimidine, oxazinone, allyltriazolinone, isourasol , Pyrimidinyl thiophthalide, triketone, triazolinone, tetrazolinone, oxazolidinedione, inorganic herbicide, biological pesticide and the like.
For example, examples of plant growth regulators include ethylene agents, auxin agents, cytokinin agents, gibberellins and the like.

なお、これらに含まれる個々の具体的な農薬活性成分は、例えば「農薬ハンドブック２０１１年版」（社団法人日本植物防疫協会、平成２３年２月２５日発行）、「ＳＨＩＢＵＹＡＩＮＤＥＸ９ｔｈＥｄｉｔｉｏｎ」（平成１３年１２月１５日発行）、「ＴｈｅＰｅｓｔｉｃｉｄｅＭａｎｕａｌＥｌｅｖｅｎｔｈＥｄｉｔｉｏｎ」（ＢｒｉｔｉｓｈＣｒｏｐＰｒｏｔｅｃｔｉｏｎＣｏｕｎｃｉｌ発行）などに記載されており、また、上記以外の公知あるいは、今後開発される農薬活性成分を適用することもでき、これらの１種または２種以上を併用しても何ら問題ない。
上記農薬活性成分は、費用対効果の観点から水性懸濁農薬製剤中に、通常０．０１〜５０重量％、好ましくは０．１〜４５重量％の範囲で添加することができる。 In addition, each specific agrochemical active ingredient contained in these is, for example, “Agricultural Chemicals Handbook 2011 edition” (Japan Plant Protection Association, issued on February 25, 2011), “SHIBUYA INDEX 9th Edition” (Heisei 13). Issued on Dec. 15, 2000), “The Pesticide Manual Elevation Edition” (published by British Crop Protection Council), and other known or future developed agrochemical active ingredients can also be applied. Even if these 1 type or 2 types or more are used together, there is no problem.
The above-mentioned pesticidal active ingredient can be generally added in the range of 0.01 to 50% by weight, preferably 0.1 to 45% by weight, in the aqueous suspension pesticide preparation from the viewpoint of cost effectiveness.

（２）保護コロイド剤
本発明において、保護コロイド剤を添加することによって、製剤の稲体へ付着性が改良され、また農薬活性成分の拡散性が良好に維持される。本発明で使用できる保護コロイド剤は、例えば、ポリビニルアルコール、水溶性セルロースエーテル（メチルセルロース、ヒドロキシエチルセルロース、ヒドロキシプロピルセルロース、ヒドロキシプロピルメチルセルロース、カルボキシメチルセルロースなど）、アラビアガム、水溶性大豆多糖類（商品名ソヤファイブ）、ゼラチン、アルブミン、アルギン酸ナトリウムなどが挙げられるが、これらに限定されるものではなく、これらの１種または２種以上を併用しても何ら問題ない。 (2) Protective colloid agent In the present invention, by adding a protective colloid agent, the adhesion of the preparation to the rice body is improved, and the diffusibility of the agrochemical active ingredient is well maintained. Protective colloid agents that can be used in the present invention include, for example, polyvinyl alcohol, water-soluble cellulose ether (methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl cellulose, etc.), gum arabic, water-soluble soybean polysaccharide (trade name Soya Five) ), Gelatin, albumin, sodium alginate and the like, but are not limited thereto, and there is no problem even if one or more of these are used in combination.

また、これら保護コロイド剤の製剤中での含有量は、水性懸濁農薬製剤中に通常０．０５〜１０重量％であり、好ましくは０．１〜３．０重量％である。含有量が０．０５重量％未満になると水性懸濁農薬製剤が稲体へ付着しやすくなり、１０重量％より多くなると水性懸濁農薬製剤が水田中へ散布された後、農薬活性成分が均一に拡散しにくくなるなどの問題が発生するためである。
また、本発明では保護コロイド剤として、ポリビニルアルコールまたは水溶性セルロースエーテルを使用すると、水性懸濁農薬製剤の稲体への付着性、水田中への農薬活性成分の拡散性がより優れたものになる。 The content of these protective colloid agents in the preparation is usually 0.05 to 10% by weight, preferably 0.1 to 3.0% by weight in the aqueous suspension pesticide preparation. When the content is less than 0.05% by weight, the aqueous suspension pesticide preparation tends to adhere to the rice. When the content is more than 10% by weight, the aqueous suspension pesticide preparation is sprayed into the paddy field, and then the agricultural chemical active ingredient is uniform. This is because a problem such as difficulty in diffusion occurs.
Further, in the present invention, when polyvinyl alcohol or water-soluble cellulose ether is used as a protective colloid agent, the aqueous suspension agricultural chemical preparation has better adhesion to rice and the diffusibility of the agricultural chemical active ingredient into the paddy field. Become.

（３）増粘剤
本発明において、増粘剤は製剤の粘度調製、および製剤の貯蔵安定性のために添加される。本発明で使用できる増粘剤は一般に使用されるものであればよく、例えばキサンタンガム、ラムザンガム、プルラン、トラガントガム、ローカストビーンガム、グアーガム、タラガム、ウエランガム、カゼイン、デキストリン、ダイユータンガム、コロイド性含水ケイ酸アルミニウム、コロイド性含水ケイ酸マグネシウム、コロイド性含水ケイ酸アルミニウムマグネシウム、含水無晶形二酸化ケイ素、結晶セルロースなどが挙げられるが、これらに限定されるものではなく、これらの１種または２種以上を併用しても何ら問題ない。また、これら増粘剤の製剤中での含有量は特に限定されないが、水性懸濁農薬製剤中に、通常０．００５〜１５重量％、好ましくは０．０１〜１０重量％である。 (3) Thickener In this invention, a thickener is added for the viscosity adjustment of a formulation, and the storage stability of a formulation. Thickeners that can be used in the present invention may be those generally used. Examples include, but are not limited to, aluminum oxide, colloidal hydrous magnesium silicate, colloidal hydrous magnesium magnesium silicate, hydrous amorphous silicon dioxide, crystalline cellulose, and the like. There is no problem even if used together. The content of these thickeners in the preparation is not particularly limited, but is usually 0.005 to 15% by weight, preferably 0.01 to 10% by weight in the aqueous suspension pesticide preparation.

（４）その他の成分
本発明において、本発明の要件である特定のずり速度における粘度を超えないこと、および、付着性などの発明の効果を損なわないことを限度に必要に応じて、上記必須成分のほかにその他の成分を添加しても構わない。その他の成分としては、例えば消泡剤としてシリコン系、脂肪酸系物質など、凍結防止剤としてエチレングリコール、プロピレングリコール、グリセリンなど、防腐防バイ剤としてソルビン酸カリウム、ｐ−クロロ−メタキシレノール、ｐ−オキシ安息香酸ブチル、１，２−ベンゾイソチアゾリン−３−オンなど、農薬活性成分の安定化剤として酸化防止剤、紫外線防止剤、結晶析出防止剤などが挙げられるが、ここに例示した成分に限定されるものではない。 (4) Other components In the present invention, the above-mentioned essential components are required as long as they do not exceed the viscosity at a specific shear rate that is a requirement of the present invention and do not impair the effects of the invention such as adhesion. In addition to the components, other components may be added. Other components include, for example, silicon-based and fatty acid-based materials as antifoaming agents, ethylene glycol, propylene glycol, glycerin and the like as antifreezing agents, potassium sorbate, p-chloro-metaxylenol, p- Examples of stabilizers for agricultural chemical active ingredients such as butyl oxybenzoate and 1,2-benzisothiazolin-3-one include antioxidants, ultraviolet light inhibitors and crystal precipitation inhibitors, but are limited to the components exemplified here. Is not to be done.

＜ずり速度５０００〜１００００（１／ｓ）における２０℃の粘度＞
本発明の水性懸濁農薬製剤は、ずり速度５０００〜１００００（１／ｓ）における２０℃の粘度を５〜５０ｍＰａ・ｓとする必要がある。ずり速度５０００〜１００００（１／ｓ）の範囲は、先端φ１〜２ｍｍの細孔を有するノズルを装着したピストン形式の蓄圧式散布機を高齢者や女性が容易に加圧可能な圧力（約０．０５〜０．１０ＭＰａ）にて、水性懸濁農薬製剤を散布する場合のノズル先端におけるずり速度範囲であり、このずり速度範囲における粘度が５０ｍＰａ・ｓより高い製剤では、蓄圧式散布機からの散布飛距離が短く、面積の大きい水田へ散布する場合には、水田中に農薬活性成分が均一に拡散しきれないなどの問題が生じるためである。また、ずり速度が５ｍＰａ・ｓ未満になると散布時に薬液が霧状になってしまい、散布飛距離が低下し、更にはドリフトの恐れも生じるためである。 <Viscosity at 20 ° C. at a shear rate of 5000 to 10,000 (1 / s)>
The aqueous suspension agricultural chemical formulation of the present invention needs to have a viscosity at 20 ° C. of 5 to 50 mPa · s at a shear rate of 5000 to 10000 (1 / s). The range of the shear rate of 5000 to 10000 (1 / s) is a pressure (about 0) that an elderly person or a woman can easily pressurize a piston-type pressure accumulating spreader equipped with a nozzle having a pore having a tip φ1 to 2 mm. 0.05 to 0.10 MPa) at the tip of the nozzle when spraying an aqueous suspension pesticide formulation. In a formulation having a viscosity higher than 50 mPa · s in this shear rate range, the pressure from the pressure accumulator This is because, when the spraying distance is short and the spraying is performed on a paddy field having a large area, there is a problem that the agricultural chemical active ingredient cannot be uniformly diffused in the paddy field. In addition, when the shear rate is less than 5 mPa · s, the chemical solution is atomized at the time of spraying, the spraying distance is reduced, and further, there is a risk of drift.

ずり速度５０００〜１００００（１／ｓ）における２０℃の水性懸濁農薬製剤の粘度は、増粘剤の種類によって一義的に決まるものではなく、農薬活性成分、保護コロイド剤、増粘剤などのそれぞれの種類と添加量によって変わるものであるため、本発明においてはこれらを明細書に記載の含有量の範囲で適宜組み合わせて水性懸濁農薬製剤の粘度を５〜５０ｍＰａ・ｓとなるように調整すればよい。 The viscosity of an aqueous suspension pesticide formulation at 20 ° C. at a shear rate of 5000 to 10,000 (1 / s) is not uniquely determined by the type of thickener, but includes agrochemical active ingredients, protective colloid agents, thickeners, etc. In the present invention, the viscosity of the aqueous suspension pesticide preparation is adjusted to be 5 to 50 mPa · s by appropriately combining these within the range of the contents described in the specification. do it.

＜水性懸濁農薬製剤の調製方法＞
本発明の水性懸濁農薬製剤の調製方法は特に限定されないが、例えば次の方法によって調製できる。
農薬活性成分、保護コロイド剤、増粘剤および必要に応じてその他の成分を、水に添加し混合する。なお、農薬活性成分を予めＪｅｔ粉砕機などで微粉砕化して使用してもよく、また、農薬活性成分、保護コロイド剤、増粘剤および必要に応じてその他の成分を水に添加後、ガラスビーズなどを用いて湿式粉砕することによって調製してもよい。また、農薬活性成分を高沸点溶剤に溶解して調製してもよい。
調製した水性懸濁農薬製剤のずり速度５０００〜１００００（１／ｓ）における２０℃の粘度は、測定し確認する。ずり速度５０００〜１００００（１／ｓ）における２０℃の粘度の測定は、レオメーターを用いて計ればよい。 <Method for preparing aqueous suspension pesticide preparation>
Although the preparation method of the aqueous suspension agricultural chemical formulation of this invention is not specifically limited, For example, it can prepare by the following method.
Agrochemical active ingredients, protective colloids, thickeners and other ingredients as required are added to water and mixed. The agrochemical active ingredient may be used after being finely pulverized with a Jet crusher or the like. In addition, the agrochemical active ingredient, protective colloid agent, thickener and other ingredients as necessary are added to water and then glass. It may be prepared by wet grinding using beads or the like. Alternatively, the agrochemical active ingredient may be prepared by dissolving in a high boiling point solvent.
The viscosity of 20 ° C. at a shear rate of 5000 to 10,000 (1 / s) of the prepared aqueous suspension pesticide preparation is measured and confirmed. The viscosity at 20 ° C. at a shear rate of 5000 to 10,000 (1 / s) may be measured using a rheometer.

＜水性懸濁農薬製剤の使用態様＞
本発明の水性懸濁農薬製剤は、原液のまま、蓄圧式散布機を用いて畦畔から湛水下水田へ直接散布する。なお、水性懸濁農薬製剤を、水で１．５から１０倍程度に希釈して蓄圧式散布機を用いて散布しても何ら問題ない。蓄圧式散布機は、先端φ１〜２ｍｍの細孔を有するノズルを装着することが望ましい。
本発明の水性懸濁農薬製剤の湛水下水田への１０ａあたりの散布量は、通常０．１〜３．０リットル、好ましくは０．２〜２．０リットル、更に好ましくは０．３〜１．０リットルである。 <Usage mode of aqueous suspension pesticide preparation>
The aqueous suspension pesticide preparation of the present invention is sprayed directly from the shore to the flooded sewage paddy field using a pressure accumulating spreader as the stock solution. In addition, there is no problem even if the aqueous suspension pesticide preparation is diluted with water to about 1.5 to 10 times and sprayed using an accumulator. It is desirable that the pressure accumulator spreader is equipped with a nozzle having a fine hole with a tip of φ1 to 2 mm.
The application amount per 10a of the aqueous suspension pesticide preparation of the present invention to the flooded sewage paddy field is usually 0.1 to 3.0 liter, preferably 0.2 to 2.0 liter, more preferably 0.3 to 1.0 liter.

次に、実施例にて本発明を更に具体的に説明するが、本発明はこれらに限定されるものではない。従って、農薬活性成分、保護コロイド剤、増粘剤を前述した種々のものに置き換えて、以下の実施例と同様な方法で調製することにより、蓄圧式散布機からの散布飛距離が長く、面積の大きい水田に有効成分を均一に拡散させることができ、かつ薬剤が稲体へ付着しにくい水性懸濁農薬製剤とすることができる。
なお、実施例中の「部」とあるのは、すべて重量部を示す。 Next, the present invention will be described more specifically with reference to examples, but the present invention is not limited thereto. Therefore, by replacing the agrochemical active ingredient, protective colloid agent and thickener with the above-mentioned various ones and preparing them in the same manner as in the following examples, the spraying distance from the pressure accumulator spreader is long and the area The active ingredient can be uniformly diffused in a large paddy field, and an aqueous suspension pesticide preparation that prevents the drug from adhering to the rice plant can be obtained.
In the examples, “parts” are all parts by weight.

また、ずり速度５０００〜１００００（１／ｓ）における２０℃の粘度は、レオメーター（ＲＨＥＯＳＴＲＥＳＳ６０００（Ｔｈｅｒｍｏ社製））を使用し、ずり速度を０から１００００まで５分かけて上げていき、ずり速度３８．４（１／ｓ）、５０００（１／ｓ）および１００００（１／ｓ）の粘度を測定した。ずり速度３８．４（１／ｓ）は、本願発明におけるずり速度の範囲ではないが、Ｂ型粘度計でも測定可能なずり速度の範囲から、一般的なずり速度の対照として測定した。あわせて５０００〜１００００（１／ｓ）のずり速度全域の粘度を確認した。 The viscosity at 20 ° C. at a shear rate of 5000 to 10000 (1 / s) is increased by using a rheometer (RHEOSTERS 6000 (manufactured by Thermo)) and increasing the shear rate from 0 to 10,000 over 5 minutes. Viscosities of speed 38.4 (1 / s), 5000 (1 / s) and 10000 (1 / s) were measured. The shear rate 38.4 (1 / s) is not a range of the shear rate in the present invention, but was measured as a general shear rate control from the range of the shear rate that can be measured with a B-type viscometer. In addition, the viscosity of the entire shear rate of 5000 to 10000 (1 / s) was confirmed.

［実施例１］
水８９．８０部にポリビニルアルコール１．００部、カスガマイシン原体４．００部を添加し、スリーワンモーター（ＨＥＩＤＯＮ製）でよく攪拌し溶解する。その後、大豆油５．００部を添加しＴＫホモミキサー（特殊機化工業株式会社製）にて混合し、キサンタンガム０．２０部を添加し、スリーワンモーター（ＨＥＩＤＯＮ製）でよく攪拌して、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は２００ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は４０ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は３５ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Example 1]
Add 1.00 parts of polyvinyl alcohol and 4.00 parts of kasugamycin base to 89.80 parts of water, and stir well with a three-one motor (made by HEIDON) to dissolve. Then, 5.00 parts of soybean oil was added and mixed with a TK homomixer (manufactured by Tokushu Kika Kogyo Co., Ltd.), 0.20 part of xanthan gum was added, and well stirred with a three-one motor (manufactured by HEIDON). An aqueous suspension pesticide formulation of the invention was obtained. The viscosity of the obtained aqueous suspension pesticide preparation at 20 ° C. is 200 mPa · s at a shear rate of 38.4 (1 / s), 40 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 35 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［実施例２］
実施例１のポリビニルアルコール１．００部をアラビアガム２．００部、キサンタンガム０．２０部を０．１０部、水８９．８０部を８８．９０部とした以外は実施例１に準じて調製し、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は２２０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は３８ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は３７ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Example 2]
Prepared according to Example 1 except that 1.00 part of polyvinyl alcohol of Example 1 was 2.00 parts of gum arabic, 0.20 part of xanthan gum was 0.10 parts, and 89.80 parts of water was 88.90 parts. Thus, the aqueous suspension pesticide preparation of the present invention was obtained. The resulting aqueous suspension pesticide formulation has a viscosity at 20 ° C. of 220 mPa · s at a shear rate of 38.4 (1 / s), 38 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 37 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［実施例３］
実施例１のポリビニルアルコール１．００部をヒドロキシプロピルメチルセルロース１．５０部、キサンタンガム０．２０部をコロイド性含水ケイ酸アルミニウム０．３０部とウエランガム０．１０部、水８９．８０部を８９．１０部とした以外は実施例１に準じて調製し、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は１８０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は３１ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は３０ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Example 3]
In Example 1, 1.00 part of polyvinyl alcohol was 1.50 parts of hydroxypropyl methylcellulose, 0.20 part of xanthan gum was 0.30 part of colloidal hydrous aluminum silicate and 0.10 part of welan gum, and 89.80 parts of water was 89.80 parts. The aqueous suspension pesticide preparation of the present invention was obtained according to Example 1 except that the amount was 10 parts. The obtained aqueous suspension pesticide preparation has a viscosity at 20 ° C. of 180 mPa · s at a shear rate of 38.4 (1 / s), 31 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 30 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［実施例４］
実施例１のポリビニルアルコール１．００部を５．００部、キサンタンガム０．２０部を０．１０部、水８９．８０部を８５．９０部とした以外は実施例１に準じて調製し、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は１９０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は４２ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は４０ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Example 4]
Prepared according to Example 1, except that 1.00 part of polyvinyl alcohol of Example 1 was 5.00 parts, 0.20 part of xanthan gum was 0.10 parts, and 89.80 parts of water was 85.90 parts, An aqueous suspension pesticide preparation of the present invention was obtained. The obtained aqueous suspension pesticide preparation has a viscosity at 20 ° C. of 190 mPa · s at a shear rate of 38.4 (1 / s), 42 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 40 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［実施例５］
実施例１のポリビニルアルコール１．００部を０．０５部、水８９．８０部を９０．７５部とした以外は実施例１に準じて調製し、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は２７５ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は３８ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は３５ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Example 5]
The aqueous suspension pesticide preparation of the present invention was obtained in the same manner as in Example 1 except that 0.05 part of polyvinyl alcohol of Example 1 and 0.05 part of 89.80 parts of water were used. . The resulting aqueous suspension pesticide formulation has a viscosity at 20 ° C. of 275 mPa · s at a shear rate of 38.4 (1 / s), 38 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 35 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［実施例６］
水７６．８５部にポリビニルアルコール３．００部を添加し、スリーワンモーターでよく攪拌し溶解する。その後、ＭＥＰ原体２０．００部を添加しＴＫホモミキサーにて混合し、キサンタンガム０．１５部を添加し、スリーワンモーターでよく攪拌して、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は２８０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は４０ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は３８ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Example 6]
Add 3.00 parts of polyvinyl alcohol to 76.85 parts of water, and stir well with a three-one motor to dissolve. Thereafter, 20.00 parts of MEP bulk was added and mixed with a TK homomixer, 0.15 part of xanthan gum was added, and the mixture was well stirred with a three-one motor to obtain the aqueous suspended agricultural chemical formulation of the present invention. The resulting aqueous suspension pesticide formulation has a viscosity at 20 ° C. of 280 mPa · s at a shear rate of 38.4 (1 / s), 40 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 38 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［実施例７］
実施例６のポリビニルアルコール３．００部をメチルセルロース０．１０部、キサンタンガム０．１５部をラムザンガム０．１０部、水７６．８５部を７９．８０部とした以外は実施例６に準じて調製し、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は３５０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は４９ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は４６ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Example 7]
Prepared according to Example 6 except that 3.00 parts of the polyvinyl alcohol of Example 6 were 0.10 parts of methylcellulose, 0.15 parts of xanthan gum were 0.10 parts of lambzan gum, and 76.85 parts of water were 79.80 parts. Thus, the aqueous suspension pesticide preparation of the present invention was obtained. The obtained aqueous suspension pesticide preparation has a viscosity at 20 ° C. of 350 mPa · s at a shear rate of 38.4 (1 / s), 49 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 46 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［実施例８］
実施例６のポリビニルアルコール３．００部を水溶性大豆多糖類３．００部、キサンタンガム０．１５部を０．０５部、水７６．８５部を７６．９０部とした以外は実施例６に準じて調製し、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は２５０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は４５ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は４１ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Example 8]
Example 6 except that 3.00 parts of polyvinyl alcohol of Example 6 was changed to 3.00 parts of water-soluble soybean polysaccharide, 0.05 part of 0.15 parts of xanthan gum, and 76.90 parts of water of 76.85 parts. The aqueous suspension pesticide preparation of the present invention was obtained. The obtained aqueous suspension pesticide preparation has a viscosity at 20 ° C. of 250 mPa · s at a shear rate of 38.4 (1 / s), 45 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 41 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［実施例９］
水９４．００部にヒドロキシエチルセルロース２．５０部を添加し、スリーワンモーターでよく攪拌し溶解する。その後、シメトリン原体３．００部、コロイド性含水ケイ酸マグネシウム０．４０部を添加しＴＫホモミキサーにて混合し、キサンタンガム０．１０部を添加し、スリーワンモーターでよく攪拌して、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は２２０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は３５ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は３２ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Example 9]
Add 2.50 parts of hydroxyethyl cellulose to 94.00 parts of water, dissolve well with 3 one motor. Thereafter, 3.00 parts of a cimetrine base and 0.40 parts of colloidal hydrous magnesium silicate were added and mixed with a TK homomixer, 0.10 parts of xanthan gum was added, and the mixture was well stirred with a three-one motor. An aqueous suspension pesticide preparation was obtained. The obtained aqueous suspension pesticide formulation has a viscosity at 20 ° C. of 220 mPa · s at a shear rate of 38.4 (1 / s), 35 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 32 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［実施例１０］
水９５．７０部にポリビニルアルコール１．００部を添加し、スリーワンモーターでよく攪拌し溶解する。その後、シメトリン原体３．００部、結晶セルロース０．３０部を添加しＴＫホモミキサーにて混合して、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は３８０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は４８ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は４５ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Example 10]
Add 1.00 parts of polyvinyl alcohol to 95.70 parts of water and stir well with a three-one motor to dissolve. Thereafter, 3.00 parts of a cimetrin base and 0.30 parts of crystalline cellulose were added and mixed with a TK homomixer to obtain an aqueous suspension agricultural chemical formulation of the present invention. The obtained aqueous suspension pesticide preparation has a viscosity at 20 ° C. of 380 mPa · s at a shear rate of 38.4 (1 / s), 48 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 45 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［実施例１１］
水８２．９０部にアラビアガム７．００部を添加し、スリーワンモーターでよく攪拌し溶解する。その後、ブタクロール原体１０．０部を添加しＴＫホモミキサーにて混合し、キサンタンガム０．１０部を添加し、スリーワンモーターでよく攪拌して、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は３００ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は４３ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は４１ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Example 11]
Add 7.00 parts of gum arabic to 82.90 parts of water and stir well with a three-one motor to dissolve. Thereafter, 10.0 parts of butachlor raw material was added and mixed with a TK homomixer, 0.10 parts of xanthan gum was added, and the mixture was thoroughly stirred with a three-one motor to obtain the aqueous suspended agricultural chemical preparation of the present invention. The obtained aqueous suspension pesticide preparation has a viscosity at 20 ° C. of 300 mPa · s at a shear rate of 38.4 (1 / s), 43 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 41 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［実施例１２］
実施例１１のアラビアガム７．００部をポリビニルアルコール２．００部、キサンタンガム０．１０部を０．１５部、水８２．９０部を８７．８５部とした以外は実施例１１に準じて調製し、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は２３０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は３９ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は３７ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Example 12]
Prepared according to Example 11 except that 7.00 parts of gum arabic in Example 11 were 2.00 parts of polyvinyl alcohol, 0.10 parts of xanthan gum were 0.15 parts and 82.90 parts of water were 87.85 parts. Thus, the aqueous suspension pesticide preparation of the present invention was obtained. The resulting aqueous suspension pesticide formulation has a viscosity at 20 ° C. of 230 mPa · s at a shear rate of 38.4 (1 / s), 39 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 37 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［実施例１３］
水７０．８０部にポリビニルアルコール１．００部を添加し、スリーワンモーターでよく攪拌し溶解する。その後、ピロキロン原体２４．００部とエチレングリコール４．００部を添加しＴＫホモミキサーにて混合し、ラムザンガム０．２０部を添加し、スリーワンモーターでよく攪拌して、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は１８０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は３３ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は３１ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Example 13]
Add 1.00 parts of polyvinyl alcohol to 70.80 parts of water, and stir well with a three-one motor to dissolve. Thereafter, 24.00 parts of Pyroxylone base and 4.00 parts of ethylene glycol were added and mixed with a TK homomixer, 0.20 part of lambzan gum was added, and the mixture was stirred well with a three-one motor, and the aqueous suspension of the present invention was A pesticide formulation was obtained. The obtained aqueous suspension pesticide preparation has a viscosity at 20 ° C. of 180 mPa · s at a shear rate of 38.4 (1 / s), 33 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 31 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［実施例１４］
実施例１３のポリビニルアルコール１．００部をアラビアガム２．００部、ラムザンガム０．２０部を０．１５部、水７０．８０部を６９．８５部とした以外は実施例１３に準じて調製し、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は１９５ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は３６ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は３４ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Example 14]
Prepared according to Example 13 except that 1.00 part of polyvinyl alcohol of Example 13 was changed to 2.00 parts of gum arabic, 0.20 part of lamb Gum gum was 0.15 part, and 70.80 parts of water was 69.85 parts. Thus, the aqueous suspension pesticide preparation of the present invention was obtained. The resulting aqueous suspension pesticide formulation has a viscosity at 20 ° C. of 195 mPa · s at a shear rate of 38.4 (1 / s), 36 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 34 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［実施例１５］
水７３．８５部にアラビアガム２．００部を添加し、スリーワンモーターでよく攪拌し溶解する。その後、ブプロフェジン原体２０．００部とプロピレングリコール４．００部を添加しＴＫホモミキサーにて混合し、ウエランガム０．１５部を添加し、スリーワンモーターでよく攪拌して、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は２１０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は３８ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は３６ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Example 15]
Add 2.00 parts of gum arabic to 73.85 parts of water and stir well with a three-one motor to dissolve. Thereafter, 20.00 parts of buprofezin base and 4.00 parts of propylene glycol were added and mixed with a TK homomixer, 0.15 part of welan gum was added, and the mixture was thoroughly stirred with a three-one motor to obtain the aqueous suspension of the present invention. A pesticide formulation was obtained. The resulting aqueous suspension pesticide formulation has a viscosity at 20 ° C. of 210 mPa · s at a shear rate of 38.4 (1 / s), 38 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 36 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［実施例１６］
実施例１５のアラビアガム２．００部をヒドロキシプロピルメチルセルロース１．５０部、水７３．８５部を７４．３５部とした以外は実施例１５に準じて調製し、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は２００ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は３６ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は３５ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Example 16]
The aqueous suspension pesticide formulation of the present invention was prepared in the same manner as in Example 15 except that 2.00 parts of gum arabic of Example 15 was changed to 1.50 parts of hydroxypropyl methylcellulose and 73.85 parts of water was changed to 74.35 parts. Got. The resulting aqueous suspension pesticide formulation has a viscosity at 20 ° C. of 200 mPa · s at a shear rate of 38.4 (1 / s), 36 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 35 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［実施例１７］
水８１．３５部にポリビニルアルコール１．５０部を添加し、スリーワンモーターでよく攪拌し溶解する。その後、ブロモブチド原体１７．００部を添加しＴＫホモミキサーにて混合し、結晶セルロース０．１５部を添加し、スリーワンモーターでよく攪拌して、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は３２５ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は４２ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は４１ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Example 17]
Add 1.50 parts of polyvinyl alcohol to 81.35 parts of water and stir well with a three-one motor to dissolve. Thereafter, 17.00 parts of bromobutide base substance was added and mixed with a TK homomixer, 0.15 part of crystalline cellulose was added, and the mixture was thoroughly stirred with a three-one motor to obtain the aqueous suspension pesticide preparation of the present invention. The obtained aqueous suspension pesticide preparation has a viscosity at 20 ° C. of 325 mPa · s at a shear rate of 38.4 (1 / s), 42 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 41 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［実施例１８］
実施例１７のポリビニルアルコール１．５０部を水溶性大豆多糖類３．００部、結晶セルロース０．１５部をラムザンガム０．１０部、水８１．３５部を７９．９０部とした以外は実施例１７に準じて調製し、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は３００ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は４０ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は３９ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Example 18]
Example 17 except that 1.50 parts of polyvinyl alcohol of Example 17 was changed to 3.00 parts of water-soluble soybean polysaccharide, 0.15 parts of crystalline cellulose to 0.10 parts of rhamzan gum, and 79.90 parts of water to 81.35 parts. The aqueous suspension pesticide preparation of the present invention was obtained according to No. 17. The resulting aqueous suspension pesticide formulation has a viscosity at 20 ° C. of 300 mPa · s at a shear rate of 38.4 (1 / s), 40 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 39 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［比較例１］
実施例１のポリビニルアルコール１．００部をポリオキシエチレンスチリルフェニルエーテル１．００部とした以外は実施例１に準じて調製し、水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は２１０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は３８ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は３６ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Comparative Example 1]
An aqueous suspended agricultural chemical preparation was obtained in the same manner as in Example 1 except that 1.00 part of polyvinyl alcohol in Example 1 was changed to 1.00 part of polyoxyethylene styryl phenyl ether. The resulting aqueous suspension pesticide formulation has a viscosity at 20 ° C. of 210 mPa · s at a shear rate of 38.4 (1 / s), 38 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 36 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［比較例２］
実施例１のキサンタンガム０．２０部を０．３０部、水８９．８０部を８９．７０部とした以外は実施例１に準じて調製し、水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は２７０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は５７ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は５５ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５０ｍＰａ・ｓより高かった。 [Comparative Example 2]
An aqueous suspension pesticide preparation was obtained in the same manner as in Example 1 except that 0.20 part of xanthan gum of Example 1 was 0.30 part and 89.80 parts of water was 89.70 parts. The obtained aqueous suspension pesticide preparation has a viscosity at 20 ° C. of 270 mPa · s at a shear rate of 38.4 (1 / s), 57 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 55 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always higher than 50 mPa · s during the measurement by increasing the shear rate to 5000 to 10,000 (1 / s) with a rheometer.

［比較例３］
実施例２のアラビアガム２．００部を４．００部、水８８．９０部を８６．９０部とした以外は実施例２に準じて調製し、水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は２５０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は７８ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は６４ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５０ｍＰａ・ｓより高かった。 [Comparative Example 3]
An aqueous suspension pesticide preparation was obtained in the same manner as in Example 2 except that 2.00 parts of gum arabic in Example 2 was changed to 4.00 parts and 88.90 parts of water was changed to 86.90 parts. The obtained aqueous suspension pesticide preparation has a viscosity at 20 ° C. of 250 mPa · s at a shear rate of 38.4 (1 / s), 78 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 64 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always higher than 50 mPa · s during the measurement by increasing the shear rate to 5000 to 10,000 (1 / s) with a rheometer.

［比較例４］
実施例７のメチルセルロース０．１０部をポリオキシエチレン・ポリオキシプロピレンブロックポリマー５．００部、水７９．８０部を７４．９０部とした以外は実施例７に準じて調製し、水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は２２０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は３７ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は３４ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Comparative Example 4]
An aqueous suspension was prepared according to Example 7, except that 0.10 parts of methylcellulose of Example 7 was changed to 5.00 parts of polyoxyethylene / polyoxypropylene block polymer and 74.90 parts of water 79.80 parts. A pesticide formulation was obtained. The resulting aqueous suspension pesticide formulation has a viscosity at 20 ° C. of 220 mPa · s at a shear rate of 38.4 (1 / s), 37 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 34 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［比較例５］
実施例６のポリビニルアルコール３．００部を５．００部、キサンタンガム０．１５部を０．１０部、水７６．８５部を７４．９０部とした以外は実施例６に準じて調製し、水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は３２０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は７５ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は７１ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５０ｍＰａ・ｓより高かった。 [Comparative Example 5]
Prepared according to Example 6 except that 3.00 parts of polyvinyl alcohol of Example 6 were changed to 5.00 parts, 0.15 parts of xanthan gum were changed to 0.10 parts, and 76.85 parts of water were changed to 74.90 parts. An aqueous suspension pesticide formulation was obtained. The obtained aqueous suspension pesticide preparation has a viscosity at 20 ° C. of 320 mPa · s at a shear rate of 38.4 (1 / s), 75 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. It was 71 mPa · s at (1 / s). In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always higher than 50 mPa · s during the measurement by increasing the shear rate to 5000 to 10,000 (1 / s) with a rheometer.

［比較例６］
実施例９のコロイド性含水ケイ酸マグネシウム０．４０部を０．３０部、キサンタンガム０．１０部を０．２０部とした以外は実施例９に準じて調製し、水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は２２０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は６１ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は５７ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５０ｍＰａ・ｓより高かった。 [Comparative Example 6]
Prepared according to Example 9 except that 0.40 part of colloidal hydrous magnesium silicate of Example 9 was 0.30 part and 0.10 part of xanthan gum was 0.20 part to obtain an aqueous suspension agricultural chemical preparation. It was. The obtained aqueous suspension pesticide preparation has a viscosity at 20 ° C. of 220 mPa · s at a shear rate of 38.4 (1 / s), 61 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 57 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always higher than 50 mPa · s during the measurement by increasing the shear rate to 5000 to 10,000 (1 / s) with a rheometer.

［比較例７］
実施例１０のポリビニルアルコール１．００部をポリオキシエチレンアルキルエーテル０．５０部とドデシルベンゼンスルホン酸ナトリウム０．５０部、結晶セルロース０．３０部を０．５０部、水９５．７０部を９５．５０部とした以外は実施例１０に準じて調製し、水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は２８０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は６０ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は５５ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５０ｍＰａ・ｓより高かった。 [Comparative Example 7]
In Example 10, 1.00 part of polyvinyl alcohol is 0.50 part of polyoxyethylene alkyl ether, 0.50 part of sodium dodecylbenzenesulfonate, 0.30 part of crystalline cellulose is 0.50 part, and 95.70 parts of water is 95. Except for 50 parts, it was prepared according to Example 10 to obtain an aqueous suspension pesticide preparation. The resulting aqueous suspension pesticide formulation has a viscosity at 20 ° C. of 280 mPa · s at a shear rate of 38.4 (1 / s), 60 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 55 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always higher than 50 mPa · s during the measurement by increasing the shear rate to 5000 to 10,000 (1 / s) with a rheometer.

［比較例８］
実施例１１のアラビアガム７．００部を１５．００部、キサンタンガム０．１０部を０．０５部、水８２．９０部を７４．９０部とした以外は実施例１１に準じて調製し、水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は４００ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は８０ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は７５ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５０ｍＰａ・ｓより高かった。 [Comparative Example 8]
Prepared according to Example 11 except that 7.00 parts of gum arabic of Example 11 were 15.00 parts, 0.10 parts of xanthan gum were 0.05 parts, 82.90 parts of water were 74.90 parts, An aqueous suspension pesticide formulation was obtained. The obtained aqueous suspension pesticide preparation has a viscosity at 20 ° C. of 400 mPa · s at a shear rate of 38.4 (1 / s), 80 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 75 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always higher than 50 mPa · s during the measurement by increasing the shear rate to 5000 to 10,000 (1 / s) with a rheometer.

［比較例９］
実施例１２のポリビニルアルコール２．００部を３．００部、キサンタンガム０．１５部を結晶セルロース０．５０部、水８７．８５部を８６．５０部とした以外は実施例１２に準じて調製し、水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は３３０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は７２ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は６５ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５０ｍＰａ・ｓより高かった。 [Comparative Example 9]
Prepared according to Example 12 except that 2.00 parts of polyvinyl alcohol of Example 12 were 3.00 parts, 0.15 parts of xanthan gum were 0.50 parts of crystalline cellulose, and 87.85 parts of water were 86.50 parts. An aqueous suspension pesticide preparation was obtained. The obtained aqueous suspension pesticide preparation has a viscosity at 20 ° C. of 330 mPa · s at a shear rate of 38.4 (1 / s), 72 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 65 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always higher than 50 mPa · s during the measurement by increasing the shear rate to 5000 to 10,000 (1 / s) with a rheometer.

［比較例１０］
実施例１３のポリビニルアルコール１．００部を１５．００部、水７０．８０部を５６．８０部とした以外は実施例１３に準じて調製し、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は４５０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は７３ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は７１ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５０ｍＰａ・ｓより高かった。 [Comparative Example 10]
The aqueous suspension pesticide preparation of the present invention was obtained in the same manner as in Example 13 except that 1.00 part of polyvinyl alcohol in Example 13 was 15.00 parts and 70.80 parts of water was 56.80 parts. . The obtained aqueous suspension pesticide preparation has a viscosity at 20 ° C. of 450 mPa · s at a shear rate of 38.4 (1 / s), 73 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. It was 71 mPa · s at (1 / s). In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always higher than 50 mPa · s during the measurement by increasing the shear rate to 5000 to 10,000 (1 / s) with a rheometer.

［比較例１１］
実施例１３のポリビニルアルコール１．００部を除き、エチレングリコール４．００部をＰＯＥスチリルフェニルエーテル１．００部、水７０．８０部を７４．８０部とした以外は実施例１３に準じて調製し、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は２５０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は４１ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は４０ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Comparative Example 11]
Prepared according to Example 13 except that 1.00 parts of polyvinyl alcohol of Example 13 were used, except that 4.00 parts of ethylene glycol was changed to 1.00 parts of POE styrylphenyl ether and 74.80 parts of water was 70.80 parts. Thus, the aqueous suspension pesticide preparation of the present invention was obtained. The resulting aqueous suspension pesticide formulation has a viscosity at 20 ° C. of 250 mPa · s at a shear rate of 38.4 (1 / s), 41 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 40 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［比較例１２］
実施例１５のアラビアガム２．００部を０．０１部、水７３．８５部を７５．８４部とした以外は実施例１５に準じて調製し、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は１５０ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は２５ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は２２ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Comparative Example 12]
The aqueous suspension pesticide preparation of the present invention was prepared according to Example 15 except that 2.00 parts of gum arabic of Example 15 was 0.01 part and 73.85 parts of water was 75.84 parts. . The obtained aqueous suspension pesticide preparation has a viscosity at 20 ° C. of 150 mPa · s at a shear rate of 38.4 (1 / s), 25 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 22 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［比較例１３］
実施例１５のアラビアガム２．００部を１３．００部、水７３．８５部を６２．８５部とした以外は実施例１５に準じて調製し、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は１１２２ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は９６ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は９４ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５０ｍＰａ・ｓより高かった。 [Comparative Example 13]
The aqueous suspension pesticide preparation of the present invention was obtained in the same manner as in Example 15 except that 2.00 parts of gum arabic of Example 15 was changed to 13.00 parts and 73.85 parts of water was changed to 62.85 parts. . The resulting aqueous suspension pesticide formulation has a viscosity at 20 ° C. of 1122 mPa · s at a shear rate of 38.4 (1 / s), 96 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 94 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always higher than 50 mPa · s during the measurement by increasing the shear rate to 5000 to 10,000 (1 / s) with a rheometer.

［比較例１４］
実施例１７のポリビニルアルコール１．５０部を除き、ＰＯＥアルキルエーテル０．５０部とドデシルベンゼンスルホン酸Ｎａ０．５０部を添加し、水８１．３５部を８１．８５部とした以外は実施例１７に準じて調製し、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は２８５ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は４２ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は４０ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５〜５０ｍＰａ・ｓであった。 [Comparative Example 14]
Except for 1.50 parts of polyvinyl alcohol in Example 17, 0.50 part of POE alkyl ether and 0.50 part of Na dodecylbenzenesulfonate were added, and Example 17 was made except that 81.35 parts of water was 81.85 parts. The aqueous suspension pesticide preparation of the present invention was obtained. The obtained aqueous suspension pesticide preparation has a viscosity at 20 ° C. of 285 mPa · s at a shear rate of 38.4 (1 / s), 42 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 40 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always 5 to 50 mPa · s during the measurement with the rheometer increasing the shear rate to 5000 to 10,000 (1 / s).

［比較例１５］
実施例１７の結晶セルロース０．１５部をラムザンガム１．００部、水８０．００部を８０．５０部とした以外は実施例１７に準じて調製し、本発明の水性懸濁農薬製剤を得た。得られた水性懸濁農薬製剤の２０℃の粘度は、ずり速度３８．４（１／ｓ）の時は８７５ｍＰａ・ｓ、ずり速度５０００（１／ｓ）の時は８７ｍＰａ・ｓ、ずり速度１００００（１／ｓ）の時は８５ｍＰａ・ｓであった。なお、レオメーターにてずり速度５０００〜１００００（１／ｓ）にずり速度を上げて測定している間の水性懸濁農薬製剤の２０℃の粘度は、常に５０ｍＰａ・ｓより高かった。 [Comparative Example 15]
Prepared according to Example 17 except that 0.15 part of crystalline cellulose of Example 17 was changed to 1.00 part of lambzan gum and 80.00 parts of water to 80.50 parts to obtain the aqueous suspension pesticide preparation of the present invention. It was. The resulting aqueous suspension pesticide formulation has a viscosity at 20 ° C. of 875 mPa · s at a shear rate of 38.4 (1 / s), 87 mPa · s at a shear rate of 5000 (1 / s), and a shear rate of 10,000. At (1 / s), it was 85 mPa · s. In addition, the viscosity at 20 ° C. of the aqueous suspension pesticide preparation was always higher than 50 mPa · s during the measurement by increasing the shear rate to 5000 to 10,000 (1 / s) with a rheometer.

次に、試験例により、本発明の水性懸濁農薬製剤の有用性を示す。
＜試験例１散布飛距離確認試験＞
直噴専用の径１．０ｍｍの丸孔を有するノズル（ミスターオートＨＳ−４０１Ｘ：工進社製）を取り付けた５リットル容の蓄圧式散布機（ミスターオートＨＳ−５０３Ｗ：工進社製）の容器内に実施例に準じて調製した水性懸濁農薬製剤２リットルを入れ、蓋を閉めて、ピストンポンプを上下させることで加圧した。蓄圧式散布機内の圧力を０．０５ＭＰａ、０．１０ＭＰａ、０．３０ＭＰａの３条件で水性懸濁農薬製剤を散布し、それぞれの条件における散布飛距離を測定した。結果は、表１、２のとおりである。
なお、蓄圧式散布機内の圧力を０．０５ＭＰａ、０．１０ＭＰａにピストンポンプを用いて加圧するのは容易であったが、０．１０ＭＰａ以上に加圧するためにはピストンポンプを上下させるのにかなりの労力が必要である。 Next, the usefulness of the aqueous suspension pesticide preparation of the present invention is shown by test examples.
<Test Example 1 Spraying distance confirmation test>
Inside the container of a 5 liter pressure accumulation type sprayer (Mister Auto HS-503W: manufactured by Koshin Co., Ltd.) equipped with a nozzle (Mister Auto HS-401X: manufactured by Koshin Co., Ltd.) having a round hole with a diameter of 1.0 mm dedicated for direct injection. 2 liters of the aqueous suspension pesticide preparation prepared according to the example was put, the lid was closed, and the piston pump was moved up and down to increase the pressure. The aqueous suspension pesticide preparation was sprayed under three conditions of 0.05 MPa, 0.10 MPa, and 0.30 MPa as the pressure in the pressure accumulating sprayer, and the scattering flight distance under each condition was measured. The results are shown in Tables 1 and 2.
In addition, it was easy to pressurize the pressure in the pressure accumulator spreader to 0.05 MPa and 0.10 MPa using a piston pump. Is required.

＜試験例２水中拡散性試験＞
水田に１．５ｍ×１５ｍの試験区を作り水深５ｃｍとなるように水を入れた。その後、ピペットを用いて、実施例に準じて調製した水性懸濁農薬製剤１１．２５ｍｌを高さ１ｍ地点から図１のＡ点に滴下した。２４時間経過後、Ａ〜Ｉ点から採水し農薬活性成分濃度を測定し、水中拡散性を確認した。なお、水中拡散性は、次式のとおり、容器内に農薬活性成分が均一に拡散した場合の理論水中濃度に対する割合で示した。 <Test Example 2 Underwater Diffusion Test>
A test area of 1.5 m x 15 m was made in the paddy field, and water was added to a depth of 5 cm. Thereafter, using a pipette, 11.25 ml of the aqueous suspension pesticide preparation prepared according to the example was dropped from a point of 1 m height to a point A in FIG. After 24 hours, water was collected from points A to I, the concentration of the agrochemical active ingredient was measured, and the diffusibility in water was confirmed. In addition, the diffusibility in water was shown by the ratio with respect to the theoretical water density | concentration when an agrochemical active ingredient diffused uniformly in a container as the following formula.

水中拡散性は、各地点（Ａ〜Ｉの地点）の値が１００％に近いほど良好となる。結果は表１、２のとおりである。 The underwater diffusibility becomes better as the value at each point (points A to I) is closer to 100%. The results are shown in Tables 1 and 2.

＜試験例３稲体への付着性試験＞
１／５０００アールのワグネルポットに水田土壌を充填し、水を加えて化学肥料を混入し代かきを行った後、２．５葉期の水稲苗をポットあたり２本移植した。試験は１処理区３ポット（合計６本）で実施し、水稲移植５日後に実施例に準じて調製した水性懸濁農薬製剤５０μＬを水稲の第２葉の葉身中央部に葉面より１ｃｍの高さからマイクロシリンジにて滴下して、葉身に水性懸濁農薬製剤が付着した稲体数を調査した。稲体に水性懸濁農薬製剤が付着しやすい場合は、水田中に所定量の薬量が投下されにくいことになる。結果は表１、２のとおりである。 <Test Example 3 Adhesion test to rice>
After filling paddy field soil into a 1/5000 aren Wagner pot, adding water and mixing with chemical fertilizer, and pruning, two 2.5-leaf rice seedlings were transplanted per pot. The test was carried out in 3 pots (6 in total) in 1 treatment area, and 50 μL of the aqueous suspension pesticide preparation prepared according to the example 5 days after transplanting rice was placed 1 cm from the leaf surface in the middle part of the second leaf of paddy rice. Was dropped with a microsyringe from the height of the rice, and the number of rice plants to which the aqueous suspension pesticide preparation adhered to the leaf blades was investigated. When the aqueous suspension pesticide formulation is likely to adhere to the rice body, it is difficult to drop a predetermined amount of the drug into the paddy field. The results are shown in Tables 1 and 2.

表１、２の内容から明らかなように、実施例１〜１８の水性懸濁農薬製剤の散布飛距離は、蓄圧式散布機内の圧力が０．０５ＭＰａの場合でも６〜８ｍとなり散布飛距離が長く、農薬活性成分の水中での拡散性も良好に維持され、付着性試験も良好な結果であった。一方、ずり速度５０００または１００００（１／ｓ）における２０℃の粘度が５０ｍＰａ・ｓより高い比較例２、３および５〜１０、１３、１５の製剤の場合は、散布機内の圧力が０．３ＭＰａと高いときは散布距離が８ｍと比較的良好な比較例製剤もあったが、圧力が０．０５ＭＰａの場合は、これらの比較例製剤は散布飛距離が２〜４ｍと短かった。また、保護コロイド剤の製剤重量部が０．０５〜１０．０重量部の範囲にない比較例８、１２、１３の製剤の場合は、拡散性がやや劣る結果となり、保護コロイド剤を使用していない比較例１、４、７、１１および１４の場合は、稲体への付着性が高くなり（６株すべてに付着）、実施例１〜１８とは顕著な差が認められた。 As is clear from the contents of Tables 1 and 2, the spraying distance of the aqueous suspension pesticide formulations of Examples 1 to 18 is 6 to 8 m even when the pressure in the pressure accumulator is 0.05 MPa, and the spraying distance is For a long time, the diffusibility of the agrochemical active ingredient in water was maintained well, and the adhesion test was also a good result. On the other hand, in the case of the preparations of Comparative Examples 2, 3 and 5-10, 13, 15 having a viscosity at 20 ° C. higher than 50 mPa · s at a shear rate of 5000 or 10,000 (1 / s), the pressure in the sprayer is 0.3 MPa. When the pressure was 0.05 MPa, these comparative examples had a short spray distance of 2 to 4 m. In addition, in the case of the preparations of Comparative Examples 8, 12, and 13 in which the preparation colloid preparation weight part is not in the range of 0.05 to 10.0 parts by weight, the result is slightly inferior in diffusibility. In Comparative Examples 1, 4, 7, 11 and 14, which were not, the adhesion to rice plants was high (attached to all 6 strains), and a significant difference was observed from Examples 1-18.

図１は、＜試験例２水中拡散試験＞の模式図である。FIG. 1 is a schematic diagram of <Test Example 2 underwater diffusion test>.

Claims

農薬活性成分、保護コロイド剤（製剤１００重量部中に０．０５〜１０．０重量部）、増粘剤および水を含有し、ずり速度５０００〜１００００（１／ｓ）における２０℃の粘度が５〜５０ｍＰａ・ｓであることを特徴とする、水性懸濁農薬製剤。 Contains an agrochemical active ingredient, a protective colloid agent (0.05 to 10.0 parts by weight in 100 parts by weight of the preparation), a thickener and water, and has a viscosity of 20 ° C. at a shear rate of 5000 to 10,000 (1 / s). An aqueous suspension pesticide preparation characterized by being 5 to 50 mPa · s.

農薬活性成分、保護コロイド剤（製剤１００重量部中に０．０５〜１０．０重量部）、増粘剤および水を含有し、ずり速度５０００〜１００００（１／ｓ）における２０℃の粘度を５〜５０ｍＰａ・ｓに調製する工程を有することを特徴とする、水性懸濁農薬製剤。 Contains an agrochemical active ingredient, a protective colloid agent (0.05 to 10.0 parts by weight in 100 parts by weight of the preparation), a thickener and water, and has a viscosity at 20 ° C. at a shear rate of 5,000 to 10,000 (1 / s). An aqueous suspension pesticide preparation, comprising a step of adjusting to 5 to 50 mPa · s.

保護コロイド剤がポリビニルアルコールまたは水溶性セルロースエーテルであることを特徴とする、請求項１または２に記載の水性懸濁農薬製剤。 The aqueous suspended agricultural chemical preparation according to claim 1 or 2, wherein the protective colloid agent is polyvinyl alcohol or water-soluble cellulose ether.

請求項１〜３のいずれかに記載の水性懸濁農薬製剤の原液を、蓄圧式散布機を使用して湛水下水田に直接散布することを特徴とする、散布方法。 A spraying method, wherein the stock solution of the aqueous suspension pesticide preparation according to any one of claims 1 to 3 is sprayed directly onto a flooded sewage paddy field using a pressure accumulator.