JPH07258016A - Herbicide and method for killing weed - Google Patents
Herbicide and method for killing weedInfo
- Publication number
- JPH07258016A JPH07258016A JP6050495A JP5049594A JPH07258016A JP H07258016 A JPH07258016 A JP H07258016A JP 6050495 A JP6050495 A JP 6050495A JP 5049594 A JP5049594 A JP 5049594A JP H07258016 A JPH07258016 A JP H07258016A
- Authority
- JP
- Japan
- Prior art keywords
- herbicide
- water
- paddy field
- growth
- water surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000002363 herbicidal effect Effects 0.000 title claims abstract description 50
- 239000004009 herbicide Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 20
- 241000196324 Embryophyta Species 0.000 title abstract description 21
- 235000015112 vegetable and seed oil Nutrition 0.000 claims abstract description 11
- 239000008158 vegetable oil Substances 0.000 claims abstract description 11
- 239000004480 active ingredient Substances 0.000 claims abstract description 6
- 238000005507 spraying Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 53
- 239000000126 substance Substances 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 241000209094 Oryza Species 0.000 description 15
- 235000007164 Oryza sativa Nutrition 0.000 description 13
- 235000009566 rice Nutrition 0.000 description 13
- 230000000694 effects Effects 0.000 description 10
- 230000009036 growth inhibition Effects 0.000 description 9
- 239000000839 emulsion Substances 0.000 description 7
- 238000009333 weeding Methods 0.000 description 5
- 239000008187 granular material Substances 0.000 description 4
- 230000009422 growth inhibiting effect Effects 0.000 description 4
- 230000001338 necrotic effect Effects 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 244000061176 Nicotiana tabacum Species 0.000 description 3
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 3
- 239000007900 aqueous suspension Substances 0.000 description 3
- 239000004359 castor oil Substances 0.000 description 3
- 235000019438 castor oil Nutrition 0.000 description 3
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000008121 plant development Effects 0.000 description 3
- 239000004563 wettable powder Substances 0.000 description 3
- 231100000674 Phytotoxicity Toxicity 0.000 description 2
- 235000019484 Rapeseed oil Nutrition 0.000 description 2
- 241001148683 Zostera marina Species 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 235000012424 soybean oil Nutrition 0.000 description 2
- 239000003549 soybean oil Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 235000019482 Palm oil Nutrition 0.000 description 1
- 235000019485 Safflower oil Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 235000012343 cottonseed oil Nutrition 0.000 description 1
- 239000002385 cottonseed oil Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000000857 drug effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000017074 necrotic cell death Effects 0.000 description 1
- 230000017066 negative regulation of growth Effects 0.000 description 1
- 239000002540 palm oil Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000003813 safflower oil Substances 0.000 description 1
- 235000005713 safflower oil Nutrition 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Landscapes
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、植物油を必須成分とし
てなる除草剤及び該除草剤を湛水下の水田に直接滴下散
布する除草方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a herbicide containing a vegetable oil as an essential component and a herbicidal method in which the herbicide is sprayed directly onto a paddy field under flooding.
【０００２】[0002]
【従来の技術】従来、湛水下水田における除草剤の散布
方法としてはその手軽さから、粒剤散布及び乳剤原液散
布が主流であり、一部では大量の水で希釈した乳剤また
は水和剤を散布する方法が用いられている。2. Description of the Related Art Heretofore, as a method for spraying herbicides in flooded sewage fields, granule spraying and emulsion stock solution spraying have been the mainstream because of their simplicity. In some cases, emulsions or wettable powders diluted with a large amount of water are used. The method of spraying is used.
【０００３】このうち粒剤散布の方法は、手軽であるた
め最も広く利用されているが、散布時の撒きむらの問題
や、均一で安定した薬効を達成するためには粒剤中の活
性成分の配合比率を高めねばならず、コスト高、環境汚
染につながる可能性を有するものである。Of these methods, the method of spraying granules is the most widely used because it is easy. However, the active ingredient in the granules is used in order to achieve a uniform spraying problem and a uniform and stable drug effect. The compounding ratio must be increased, which may lead to high cost and environmental pollution.
【０００４】一方、乳剤の原液散布法も粒剤散布と同様
に手軽な方法であるが、田植え後に行なうと、乳剤中に
含有されている有機溶剤により稚苗稲への薬害が起きる
ため、散布は田植え前に行なわねばならないこと、さら
にその後の田植え時の落水作業による水田周囲水界への
流出により環境汚染が引き起こされる可能性があること
など、多くの問題を抱えている。On the other hand, the undiluted solution spraying method of emulsion is as easy as the spraying of granules. However, if it is carried out after rice planting, the organic solvent contained in the emulsion causes phytotoxicity to the seedling rice, so that it is sprayed. Has many problems, including that it must be done before planting rice, and that subsequent flooding work during rice planting may cause environmental pollution due to runoff to the surrounding waters around the paddy field.
【０００５】さらに、乳剤または水和剤を大量の水に希
釈して散布する方法では、散布液調製時に多大の労力を
要することや、乳剤には有機溶剤に起因する問題、水和
剤には散布液調製時に粉立ちを生じて作業者の健康を損
ねる可能性があることなどが指摘されている。Further, in the method of diluting an emulsion or a wettable powder in a large amount of water and spraying it, a great deal of labor is required when preparing a spraying liquid, a problem due to an organic solvent in the emulsion, and a wettable powder in the wettable powder. It has been pointed out that powdering may occur during preparation of the spray liquid, which may impair the health of the worker.
【０００６】上記の問題点を解決する目的で近年、水性
懸濁剤の原液を湛水下の水田に直接滴下散布する方法
（特開昭６２−４５５０１号、特開昭６２−２８９５０
２号、特開昭６３−１０７９０１号、特開平４−２７０
２０１号、特開平４−２７０２０２号各公報）や、湛水
下水田の水面に油性懸濁剤を直接散布することにより薬
剤が水面上を急速に拡散し、その後水中に分散していく
形式の製剤（特開昭５４−３５２１６号、特開平４−１
８００２号、特開平４−２１６１１号、特開平４−２１
６１２号、特開平４−２１６１３号各公報）が提案され
ている。しかしながら、これらはいずれも既存の除草剤
原体を含有するためにコスト的に問題があるうえ、水田
水中全体に分散するために水質汚濁、土壌汚染の原因に
なる可能性を有している。For the purpose of solving the above-mentioned problems, in recent years, a method of directly dripping an undiluted solution of an aqueous suspension into a paddy field under flooding (Japanese Patent Laid-Open Nos. 62-45501 and 62-28950).
No. 2, JP-A-63-107901, JP-A-4-270.
No. 201, JP-A-4-270202) or a method in which an agent is rapidly dispersed on the surface of water by directly spraying an oily suspension on the surface of a flooded paddy field, and then dispersed in water. Formulations (JP-A-54-35216, JP-A-4-1)
8002, JP-A-4-21611, JP-A-4-21
612 and JP-A-4-21613). However, all of them have a problem in terms of cost because they contain the existing herbicide raw material, and since they are dispersed throughout the paddy water, they may cause water pollution and soil pollution.
【０００７】[0007]
【発明が解決しようとする課題】本発明の目的は、この
ような従来の除草剤及び除草方法の有していた問題点を
解決することにあり、具体的には、水質、土壌等の環境
に与える影響が少なく、コスト面においても優れた除草
剤及び除草方法を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the problems that such conventional herbicides and herbicidal methods have, and specifically, the environment such as water quality and soil. The object of the present invention is to provide a herbicidal agent and a herbicidal method which have a small influence on the plant and are excellent in cost.
【０００８】[0008]
【課題を解決するための手段】本発明者等はこうした現
状を踏まえ、湛水下の水田に直接滴下散布する除草方法
について鋭意検討を重ねた結果、水面を速やかに拡展
し、かつ水面に浮遊し、水面で除草効果を発揮する除草
剤を用いることにより、上述したような問題点を解決で
きることを見出し、更に、植物油がこうした特性を有す
ることを見出し、これらの知見に基づき本発明を完成し
た。[Means for Solving the Problems] In view of the present situation, the inventors of the present invention have made extensive studies on a weeding method in which water is sprayed directly onto flooded paddy fields, and as a result, they rapidly spread the water surface and It was found that by using a herbicide that floats and exerts a herbicidal effect on the water surface, it is possible to solve the above-mentioned problems, and further it is found that vegetable oil has such characteristics, and the present invention was completed based on these findings. did.
【０００９】すなわち、本願の第１の発明は、植物油を
有効成分として含有することを特徴とする除草剤であ
る。That is, the first invention of the present application is a herbicide containing a vegetable oil as an active ingredient.
【００１０】また、本願の第２の発明は、上記の除草剤
を湛水下の水田に直接滴下散布することを特徴とする除
草方法である。A second invention of the present application is a weeding method characterized in that the above-mentioned herbicide is sprayed directly onto a paddy field under flooding.
【００１１】以下、本願の発明を詳細に説明する。The invention of the present application will be described in detail below.
【００１２】本発明の除草剤は、植物油を有効成分と
し、既存の除草剤原体を含有していない。The herbicide of the present invention contains a vegetable oil as an active ingredient and does not contain an existing herbicide raw material.
【００１３】本発明の除草剤は、水田水に滴下すること
により水面を速やかに拡展し、水中に分散すること無く
継続して水面を浮遊する特性を有し、水面下の雑草類、
特にノビエをはじめとするイネ科雑草が成長して水面上
に現われる際に植物体に付着して壊死させ、水面上への
伸長を阻害するものであり、従来の水田用除草剤とは異
質の除草効果を有する。本除草剤が充分に付着した葉は
水面で壊死し、その後その植物個体は水上へ伸長し得な
くなるが、本除草剤の付着が不充分で水面で壊死するま
でに至らなかった葉でも、水上に伸長した後に枯れ上が
るといった症状を示す。よって、作業者が水田に入るこ
と無く、水田水面の一点もしくは数ヶ所に本除草剤を滴
下施用することにより、水面を速やかにかつ非常に広範
囲に拡展し、その後水面を浮遊し続け、長期間にわたり
除草効果を発揮する。従来の液体施用製剤（乳剤、水和
剤、水性懸濁剤等）は、施用時に多量の水で希釈し、さ
らに散布機を用いて散布するため、広域にわたり施用す
る場合は多大な労力を要する。本発明は、こうした散布
時の煩雑な作業を無くし、労力を軽減する非常に画期的
なものである。すでに、水性懸濁剤や油性懸濁剤などを
直接水田水中に滴下する方法はいくつか報告されている
が（前記の公報）、これらは最終的に水田水中に分散す
るタイプのものであるのに対し、本発明の除草剤は永続
的に水面を浮遊して効果を発揮するため、除草終了後は
水田水の水量を増し、上層のみを水田外に流出させるこ
とにより回収することが可能である。こうした特性を有
するうえに、施用量は極少量で済むため、環境に与える
影響は非常に少ない。The herbicide of the present invention has the property of rapidly spreading the water surface by dropping it in paddy water and continuously floating the water surface without being dispersed in the water.
Especially, grass weeds such as Nobie are attached to plants when they grow and appear on the water surface, causing necrosis and inhibiting growth on the water surface, which is different from conventional paddy field herbicides. Has a herbicidal effect. Leaves with sufficient adherence of this herbicide are necrotic on the surface of the water, and then the plant individual cannot grow on the water.However, even leaves that have not been necrotic on the surface of the herbicide due to insufficient adhesion of the herbicide on the surface of the water. It shows a symptom that it withers and then withers. Therefore, by applying this herbicide dropwise to one or several points on the surface of the paddy field without the worker entering the paddy field, the surface of the water can be spread quickly and over a very wide range, and then the surface of the water can be kept floating and long-lasting. Exhibits herbicidal effect over a period of time. Conventional liquid application preparations (emulsions, wettable powders, aqueous suspensions, etc.) are diluted with a large amount of water at the time of application, and are sprayed using a sprayer, so a large amount of labor is required when applied over a wide area. . The present invention is a very epoch-making thing which eliminates such complicated work at the time of spraying and reduces labor. Already, several methods of dropping an aqueous suspension or oily suspension directly into paddy water have been reported (the above-mentioned publication), but these are the types that are finally dispersed in paddy water. On the other hand, since the herbicide of the present invention permanently floats on the water surface and exerts an effect, it is possible to recover by increasing the amount of water in the paddy field after the weeding and allowing only the upper layer to flow out of the paddy field. is there. In addition to having these characteristics, the application amount is extremely small, so that it has very little effect on the environment.
【００１４】本発明において用いることのできる植物油
としては、大豆油、菜種油、ひまし油、綿実油、パーム
油、サフラワー油等が挙げられるが、これらに限定され
るものではない。Examples of vegetable oils that can be used in the present invention include, but are not limited to, soybean oil, rapeseed oil, castor oil, cottonseed oil, palm oil, and safflower oil.
【００１５】以上のほかに、必要に応じて各種添加剤、
例えば分解防止剤、酸化防止剤などを添加、使用するこ
とは何等差支えない。In addition to the above, various additives, if necessary,
For example, it does not make any difference to add and use a decomposition inhibitor, an antioxidant and the like.
【００１６】本発明の除草剤は、水田中に発生するあら
ゆる雑草に対して効果を発揮するが、特にノビエ等のイ
ネ科雑草に対して有効である。除草対象とする植物の生
育段階については、特に制限はないが、植物体全体が未
だ水田中に水没した状態にある生育初期のものに対して
特に有効である。例えば、ノビエであれば、２葉期以下
の生育段階のものに対する効果が大きい。なお、本発明
の除草剤は、水田における有用作物であるイネの生育に
対しては何等影響を与えない。The herbicide of the present invention exerts an effect on all weeds occurring in paddy fields, but is particularly effective on grass weeds such as Nobie. The growth stage of the plant to be weeded is not particularly limited, but it is particularly effective for the early growth stage in which the whole plant is still submerged in the paddy field. For example, if it is a Nobie, it has a great effect on the growth stage of 2 leaf stage or less. The herbicide of the present invention has no effect on the growth of rice, which is a useful crop in paddy fields.
【００１７】本発明の除草剤を実際の水田において施用
する場合、その施用方法は、雑草を有効に防除し得る方
法であれば特に制限されないが、湛水下の水田に直接滴
下散布することが望ましい。When the herbicide of the present invention is applied to an actual paddy field, the application method is not particularly limited as long as it is a method capable of effectively controlling weeds, but it can be directly applied by spraying to a paddy field under flooded water. desirable.
【００１８】本発明の除草剤の使用時期は、特に制限さ
れないが、水没状態の幼植物に効果があるため、田植え
後に使用するのが望ましい。また、本除草剤を田植え後
の水田にて滴下施用する場合、１ａ（アール）あたり１
００ｍｌ以上、好ましくは２００〜５００ｍｌを滴下施
用することが望ましい。施用量が上記の範囲未満である
と充分な除草効果が期待できないが、上記の範囲内で施
用量を設定すれば適切な除草が可能である。そのため、
過剰に施用することはコスト面などを考慮すると好まし
くない。The time of use of the herbicide of the present invention is not particularly limited, but it is preferable to use it after planting rice because it has an effect on seedlings submerged in water. When applying this herbicide drop-wise in paddy fields after planting, 1 per 1 a
It is desirable to apply 00 ml or more, preferably 200 to 500 ml dropwise. If the application rate is less than the above range, a sufficient herbicidal effect cannot be expected, but if the application rate is set within the above range, proper weeding is possible. for that reason,
Excessive application is not preferable in consideration of cost and the like.
【００１９】[0019]
【実施例】以下で実施例を挙げて本発明を説明するが、
本発明はこれら実施例によって何等制限されるものでは
ない。The present invention will be described below with reference to examples.
The present invention is not limited to these examples.
【００２０】実施例１（ノビエに対する生育阻害効果試
験） ａ）葉令と生育阻害度の関係 １／１００００ａのポットで水田土を用いてノビエを育
苗し、これに水を加えた後に（２葉期程度のノビエであ
れば植物体のほぼ全体が水没することになる。）、ひま
し油を１ポットにつき１０μｌずつ滴下した。この際、
ノビエの葉令と生育阻害度の関係を調べるために、葉令
の異なるノビエ（２葉期、１．５葉期、１葉期）を用い
た。滴下処理後３週間にわたり、処理を施したポットと
無処理のポットとの間でノビエの生育状態を比較観察し
た。無処理のノビエは水上に伸長したのに対し、処理を
施したポットのうち植物体全体が水没していたものは、
成長にともない水面で本除草剤が付着し、水上への伸長
が著しく阻害された。また、処理前に水上に伸長してい
たノビエに関しても、成長にともない水没していた部分
が水面で本除草剤によりダメージを受け、その後枯れ上
がるといった現象が観察された。なお、この際、本除草
剤のイネの生育への影響を調べるため、ノビエと同様に
育苗した葉令の異なるイネに関しても滴下処理を行な
い、生育状況を観察した。 Example 1 (Test of growth inhibitory effect on Nobie
Test) a) Relationship between leaf age and growth inhibition degree After growing seedlings of Nobie by using paddy soil in a pot of 1 / 10000a, and adding water to the seeds (almost whole plant of Nobie in 2-leaf stage) Will be submerged in water), and 10 μl of castor oil was added dropwise to each pot. On this occasion,
In order to investigate the relationship between the leaf age and the degree of growth inhibition of Nobie, nobies with different leaf ages (2 leaf stage, 1.5 leaf stage, 1 leaf stage) were used. For 3 weeks after the dripping treatment, the growth state of Nobie was compared and observed between the treated pot and the untreated pot. The untreated nobie grew on the water, whereas the treated pots in which the whole plant was submerged
The herbicide adhered to the surface of the water as it grew and its extension on the water was significantly inhibited. In addition, it was also observed that, even with regard to the Novi fly that had grown on the water before the treatment, the part that had been submerged due to growth was damaged by the herbicide on the water surface and then withered. At this time, in order to investigate the effect of this herbicide on the growth of rice, drop treatment was also performed on rice plants with different leaf ages, which were raised in the same manner as in Nobie, and the growth condition was observed.
【００２１】本除草剤のノビエに対する生育阻害効果
の、処理３週間後までの判定結果を表１に示す。また、
本除草剤のイネへの生育阻害度の、処理３週間後までの
判定結果を表２に示す。Table 1 shows the results of determination of the growth inhibitory effect of the present herbicide on Nobies up to 3 weeks after the treatment. Also,
Table 2 shows the determination results of the degree of inhibition of growth of this herbicide on rice up to 3 weeks after the treatment.
【００２２】生育阻害度は、無処理ポットにおける生育
状況と差異の無かった場合を０％、生育が完全に阻害さ
れた場合を１００％とする百分率で表わした。よって、
ノビエに関しては処理時の葉令が２葉期以下で植物体全
体が水没状態であったポットは、阻害度が１００％の場
合は、成育が阻害されることによりポット内の植物体全
てが水面上に伸長できずやがて壊死したことを意味す
る。The degree of growth inhibition was expressed as a percentage with 0% when there was no difference from the growth situation in the untreated pot and 100% when the growth was completely inhibited. Therefore,
As for Nobie, the pot in which the leaf age at the time of treatment was 2 leaves stage or less and the whole plant was submerged, the growth rate was 100% when all the plants in the pot were on the water surface when the degree of inhibition was 100%. It means that it could not extend upward and eventually became necrotic.
【００２３】[0023]
【表１】 [Table 1]
【００２４】[0024]
【表２】 [Table 2]
【００２５】このように、本発明に関わる除草剤を実施
例の方法で１／１００００ａ当たり１０μｌ、つまり１
ａ当たり１００ｍｌ施用することによって、水没した状
態の２葉期以下のノビエの生育をかなり強力に阻害し得
ることが判明した。なお、表１では数値的に植物が回復
するように見受けられるが、これは水面での薬剤の付着
が充分でなくダメージから回復した葉の存在が数値化さ
れたためで、実際の使用場面では適宜滴下施用すれば完
全防除が可能である。また、本除草剤はイネの生育に全
く影響を及ぼさないことも確認された。なお、本除草剤
は水面滴下後速やかに水面を拡展し、継続して水面を浮
遊して効果を発揮した。As described above, the herbicide according to the present invention was treated by the method of the example in an amount of 10 μl per 1 / 10000a, that is, 1
It was found that the application of 100 ml per a can considerably strongly inhibit the growth of Nobier in the submerged state at the 2nd leaf stage or below. In Table 1, it seems that the plants recover numerically, but this is because the adhesion of the chemicals on the water surface was not sufficient and the existence of the leaves recovered from damage was quantified. Complete control is possible if applied dropwise. It was also confirmed that this herbicide had no effect on rice growth. In addition, this herbicide spread the water surface immediately after dropping on the water surface and continuously floated on the water surface to exert its effect.
【００２６】ｂ）滴下量と生育阻害度の関係 １／１００００ａのポットで水田土を用いてノビエを
１．５葉期まで育苗し１ポットにつき５本ずつに間引
き、水を加えて水没状態にした後に、ａ）の除草剤の一
定量を滴下した。その後４週間にわたり、処理を施した
ポットと無処理のポットとの間でノビエの生育状態を比
較観察し、滴下量と生育阻害度の関係を調べた。処理４
週間後までの判定結果を表３に示す。B) Relationship between dropping amount and growth inhibition degree In a pot of 1 / 10000a, seedlings of Nobie are grown to 1.5 leaf stage, thinned into 5 pots per pot, and water is added to submerge them. After that, a fixed amount of the herbicide in a) was dropped. Over the next 4 weeks, the growth state of Nobie was compared and observed between the treated pot and the untreated pot, and the relationship between the dropping amount and the growth inhibition degree was investigated. Process 4
Table 3 shows the determination results up to a week later.
【００２７】生育阻害度は、無処理ポットにおけるノビ
エの生育状況と差異の無かった場合を０％、５本の植物
体全てが水面に拡展した本除草剤によりダメージを受
け、水面上への伸長を完全に阻害された場合を１００％
とする百分率で表わした。なお、１００％の状態が続く
とやがて水浸状のダメージが広がり植物体全体が壊死し
た。The degree of growth inhibition was 0% when there was no difference from the growth condition of Nobie in the untreated pot, and all five plants were damaged by the herbicide spread on the water surface, and 100% when the elongation is completely inhibited
And expressed as a percentage. In addition, when the state of 100% continued, the water-like damage eventually spread and the whole plant was necrotic.
【００２８】[0028]
【表３】 [Table 3]
【００２９】このように、１ポット当たり１０μｌの滴
下量でも充分にノビエの生育を阻害し得るが、５０μｌ
の滴下により、ダメージを受けた植物体の再生をほぼ完
全に抑制できることが判明した。Thus, although 10 μl of the amount added per pot can sufficiently inhibit the growth of Nobie, 50 μl
It was found that by dripping, the regeneration of damaged plants can be suppressed almost completely.
【００３０】なお、この際、本除草剤の滴下量とイネの
生育阻害効果の関係を調べるため、１／１００００ａの
ポットで水田土を用いて２．５葉期まで育苗したイネに
関しても、ノビエと同様にポットを水で満たし第２葉か
ら下部を水没させた後に滴下処理を行ない、生育状況を
観察した。滴下処理４週間後までの判定結果を表４に示
す。生育阻害度は、前記と同様の百分率で表わした。At this time, in order to investigate the relationship between the dropping amount of the herbicide and the growth inhibitory effect of rice, rice plants grown up to the 2.5 leaf stage in paddy soil of 1 / 10000a were also used to grow Similarly to the above, the pot was filled with water, the lower part from the second leaf was submerged, and then the dropping treatment was performed to observe the growth condition. Table 4 shows the determination results up to 4 weeks after the dropping treatment. The degree of growth inhibition was expressed as the same percentage as above.
【００３１】[0031]
【表４】 [Table 4]
【００３２】このように、第２葉から上部が水面上に伸
長した状態のイネは、本除草剤を１／１００００ａ当た
り５０μｌ滴下した場合であっても全く影響を受けない
ことが判明した。よって、実際に田植え後の水田で本除
草剤を滴下施用する場合、イネへの薬害は問題にならな
い。As described above, it was revealed that the rice in which the upper part of the second leaf extends above the water surface is not affected even when 50 μl of the present herbicide is dripped per 1/10000 a. Therefore, when the herbicide is applied dropwise to a paddy field after rice planting, phytotoxicity to rice is not a problem.
【００３３】実施例２（各種植物油に関する検討） １／１００００ａのポットで水田土を用いてノビエを
１．５葉期まで育苗し１ポットにつき５本ずつに間引
き、水を加えて水没状態にした後に、各種植物油（ひま
し油、菜種油、大豆油）を２０μｌずつ滴下した。その
後３週間にわたり、前記と同様にして植物油の種類と生
育阻害度の関係を調べた。判定結果を表５に示す。な
お、生育阻害度の判定は、実施例１と同様に行なった。 Example 2 (Study on various vegetable oils) In a pot of 1 / 10000a, Nobie was grown up to 1.5 leaf stage using paddy soil, thinned into 5 plants per pot, and water was added to submerge it. After that, 20 μl each of various vegetable oils (castor oil, rapeseed oil, soybean oil) were dropped. Then, for 3 weeks, the relationship between the type of vegetable oil and the degree of growth inhibition was examined in the same manner as above. The judgment results are shown in Table 5. The growth inhibition degree was determined in the same manner as in Example 1.
【００３４】[0034]
【表５】 [Table 5]
【００３５】このように、あらゆる植物油がノビエに対
する生育阻害効果を有することが判明し、かつ、それら
は水面滴下後速やかに水面を拡展し、継続して浮遊する
ものであった。As described above, it was found that all vegetable oils have a growth inhibitory effect on Nobies, and they rapidly spread the water surface after being dripped on the water surface and continuously float.
【００３６】[0036]
【発明の効果】本発明の除草剤を水田水に少量直接滴下
施用することにより、水面を速やかに広範囲に拡展した
薬剤による水田雑草の防除が可能となる。本除草剤は、
既存の化学除草剤原体を含有せず、継続して水面を浮遊
するため、除草後は水田水上層を除去することにより排
除でき、環境に与える影響も少ない。EFFECTS OF THE INVENTION By applying a small amount of the herbicide of the present invention directly to paddy field water, it becomes possible to control weeds in paddy fields with a chemical that spreads the water surface rapidly over a wide area. This herbicide is
Since it does not contain the existing active ingredient of chemical herbicides and continuously floats on the water surface, it can be eliminated by removing the upper layer of the paddy field after weeding, and has little impact on the environment.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 田辺 陽子 神奈川県横浜市緑区梅が丘６番地２ 日本 たばこ産業株式会社植物開発研究所横浜セ ンター内 (72)発明者 辻野 泰子 神奈川県横浜市緑区梅が丘６番地２ 日本 たばこ産業株式会社植物開発研究所横浜セ ンター内 (72)発明者 森田 健二 神奈川県横浜市緑区梅が丘６番地２ 日本 たばこ産業株式会社植物開発研究所横浜セ ンター内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoko Tanabe 6 Umegaoka, Midori-ku, Yokohama-shi, Kanagawa Prefecture, Japan 2 Tobacco Inc. Plant Development Laboratory Yokohama Center (72) Inventor Yasuko Tsujino Midori-ku, Yokohama-shi, Kanagawa Umegaoka 6 2 Japan Tobacco Inc., Plant Development Laboratory Yokohama Center (72) Inventor Kenji Morita 6 Umegaoka 6, Midori Ward, Yokohama City, Kanagawa Japan Tobacco Inc. Plant Development Laboratory Yokohama Center
Claims (2)
特徴とする除草剤。1. A herbicide containing a vegetable oil as an active ingredient.
直接滴下散布することを特徴とする除草方法。2. A herbicidal method, which comprises spraying the herbicide according to claim 1 directly onto a paddy field under flooding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6050495A JPH07258016A (en) | 1994-03-22 | 1994-03-22 | Herbicide and method for killing weed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6050495A JPH07258016A (en) | 1994-03-22 | 1994-03-22 | Herbicide and method for killing weed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07258016A true JPH07258016A (en) | 1995-10-09 |
Family
ID=12860518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6050495A Pending JPH07258016A (en) | 1994-03-22 | 1994-03-22 | Herbicide and method for killing weed |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07258016A (en) |
-
1994
- 1994-03-22 JP JP6050495A patent/JPH07258016A/en active Pending
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