JP2004189601A - Method for controlling rice plant seed infectious disease injury - Google Patents
Method for controlling rice plant seed infectious disease injury Download PDFInfo
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- JP2004189601A JP2004189601A JP2002355312A JP2002355312A JP2004189601A JP 2004189601 A JP2004189601 A JP 2004189601A JP 2002355312 A JP2002355312 A JP 2002355312A JP 2002355312 A JP2002355312 A JP 2002355312A JP 2004189601 A JP2004189601 A JP 2004189601A
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- rice
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Abstract
Description
【0001】
【発明の属する技術分野】
本発明は、イネ種子伝染性病害の防除方法に関する。
【0002】
【従来の技術】
従来から、イネ種子消毒方法として浸種前や浸種後の種子浸漬処理や種子吹き付け処理または種子塗抹処理が多く用いられている。これらの種子処理方法によりイネ種子伝染性病の発病を未然に防除し、水稲栽培に大きく寄与してきている。しかし、近年、環境汚染の問題から浸漬処理に用いた薬剤調製液の廃液処理問題が浮上してきている。その対策として、各種高分子凝集剤や活性炭等を利用した廃液の凝集処理方法が開発されてきている。また、それらの処理を行う種子消毒廃液処理方法及び装置も考案されている(たとえば、特許文献1参照。)。しかし、これらの処理方法は、特別な薬剤や装置が必要となる欠点が挙げられる。
また、廃液処理が出ない種子処理方法として、種子粉衣及び種子塗抹処理が知られている。しかし、これらの処理方法は特別な機械が必要であったり、乾燥工程が必要であったりと、処理工程が複雑である欠点が挙げられる。
【0003】
【特許文献1】
特開平11−235582公報
【0004】
【発明が解決しようとする課題】
本発明は、かかる実状に鑑みてなされたものであり、廃水処理問題がなく、効力にばらつきが少なく、かつ高い効果を有するイネ種子伝染性病害の防除方法を提供することを課題とする。
【0005】
【課題を解決するための手段】
上記の課題を解決するため、本発明者らは廃液処理問題がなく、また、一連の作業の中で簡便にかつ高い効果を有するイネ種子伝染性病害の防除方法を検討した。
【0006】
その結果、イネ種子を播種した後、播種したイネ種子に薬液を散布処理することにより従来の処理方法に比べ少ない投下薬量でイネ種子伝染性病の発病を安定的にかつ効率よく防除できることを見出した。
【0007】
具体的には、従来の方法で浸種し、催芽処理したイネの種子を育苗箱に播種し、播種後、イネ種子処理農薬の薬液を散布処理する。散布タイミングは、覆土前,覆土後どちらでも良いが、覆土前の散布処理の方が高い効果が期待できる。この処理方法を採ることにより、浸種処理後の廃液問題が解決でき、かつ、一連の流れ作業のなかでイネ種子伝染性病害を防除することができる。
【0008】
すなわち、本発明は、イネ種子消毒剤の環境上の問題点を解決したイネ種子処理方法を提供する。
【0009】
【実施の形態】
以下に、本発明について詳細に説明する。
本発明は、イネ種子伝染性病の防除方法である。
【0010】
本発明におけるイネ種子消毒剤は化学農薬である。
【0011】
かかるイネ種子消毒剤は、現在市販されているものとして、イプコナゾール、プロクロラズ、ペフラゾエート、トリフルミゾール、ベノミル、チウラム、チオファネートメチル、フルジオキソニル、キャプタン、チアベンダゾール、オキソリニック酸、および、水酸化第二銅からなる成分を一つまたは二つ以上含有する剤を挙げることができる。
【0012】
本発明の散布液濃度には特に制限はないが、各種薬剤は、低濃度長時間(24時間)浸漬処理に使用する濃度以下でよい。
【0013】
散布水量は、播種したイネ種子に十分かかる量であれば特に制限はないが、好ましくは、育苗箱(30×60×3cm 土壌約5リットル)あたり50〜500ml、さらに好ましくは50〜200mlの範囲である。
【0014】
次に、本発明のイネ種子伝染性病の防除方法について説明する。本発明の防除方法は、播種時にイネ種子消毒剤を散布処理することを特徴とする。
【0015】
本発明のイネ種子伝染性病の防除方法は、播種時に散布処理することによりイネ種子伝染性病を効果的に防除することができる。
【0016】
【実施例】
次に、実施例により本発明をより具体的に説明するが、本発明は以下の実施例に何ら限定されるものではなく、本発明の主旨を逸脱しない範囲で、種子消毒剤の種類、製剤の組成割合、剤型等を自由に変更することができる。また、以下の実施例や比較例では、市販のスポルタック(プロクロラズ)乳剤とテクリードC(イプコナゾール+水酸化第二銅)フロアブル剤を用いた。
【0017】
A)イネばか苗病防除効果試験
(実施例1)
プロクロラズ乳剤(スポルタック25.0%乳剤:日産化学工業)を用いた。定法でイネ種子を浸漬および催芽処理し、宇部粒状培土に播種した。覆土前にプロクロラズ乳剤の1000倍希釈薬液をハンドスプレーにて均一に散布処理した。散布液量は育苗箱あたり100mlとした。
【0018】
(比較例1)
比較例として実施例1で用いたプロクロラズ乳剤の1000倍希釈薬液中に15℃で24時間イネ種子を浸漬処理した。処理後、イネ種子を水道水に積算温度100℃を目安に浸漬処理したあと、30℃で1日間催芽処理を行なった。播種後出芽処理を30℃で2日間行なった後、温室内で育苗した。なお、無処理区は、薬剤処理を行わない他は、実施例1および比較例1と同様の操作を行った。
【0019】
(実施例2)
イプコナゾール+水酸化第二銅フロアブル剤(テクリードC5.0+4.6%フロアブル剤:クミアイ化学工業)を用いた。定法でイネ種子150gを浸漬および催芽処理し、宇部粒状培土に播種した。覆土前にイプコナゾール+水酸化第二銅フロアブル剤の200倍希釈薬液をハンドスプレーにて均一に散布処理した。散布液量は育苗箱あたり100mlとした。
【0020】
(比較例2)
比較例として実施例2で用いたイプコナゾール+水酸化第二銅フロアブル剤の200倍希釈薬液300ml中に15℃で24時間イネ種子150gを浸漬処理した。処理後、イネ種子を水道水に積算温度100℃を目安に浸漬処理したあと、30℃で1日間催芽処理を行なった。播種後出芽処理を30℃で2日間行なった後、温室内で育苗した。なお、無処理は、薬剤処理を行わない他は、実施例2および比較例2と同様の操作を行った。
【0021】
調査方法)
イネの苗が2〜3葉期になった時点で、下記の基準でイネばか苗病の発病率を調査した。結果を第1表に示した。
イネばか苗病発病苗率(%)=(徒長苗数/(徒長苗数+健全苗数))×100
【0022】
実施例結果)
実施例および比較例の実験結果を表に示す。実施例1では、比較例1の試験例と同様イネばか苗病に対し、高い防除価が得られた。また、比較例2で示されたように、通常の浸種処理方法で高い防除価が得られなかった場合に於いても、実施例2の播種時の散布処理方法では、高い防除価が得られた。これらの試験結果より、播種時の散布処理方法は、有効かつ有望な処理方法であることが示された。
【表1】
【0023】
【発明の効果】
以上説明したように、本発明によれば、廃液処理問題が無く、かつイネの育苗センター等、大型の種子処理施設の設備を有効に利用でき、一連の流れ作業のなかでイネ種子伝染性病害を防除することができるイネ種子伝染性病防除方法が提供される。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for controlling rice seed-borne diseases.
[0002]
[Prior art]
Conventionally, as a rice seed disinfection method, seed soaking treatment, seed spraying treatment, or seed smearing treatment before or after soaking is often used. These seed treatment methods have been used to control the emergence of rice seed infectious diseases, and have greatly contributed to rice cultivation. However, in recent years, the problem of treating the waste liquid of the chemical preparation used for the immersion treatment has emerged due to the problem of environmental pollution. As a countermeasure, a flocculation treatment method for waste liquid using various polymer flocculants, activated carbon and the like has been developed. Also, a method and apparatus for treating seed disinfecting waste liquid that perform such treatment have been devised (for example, see Patent Document 1). However, these processing methods have the drawback that special chemicals and equipment are required.
Also, seed dressing and seed smearing are known as seed treatment methods that do not produce waste liquid treatment. However, these processing methods have drawbacks in that the processing steps are complicated, such as the necessity of a special machine or the drying step.
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. H11-235558
[Problems to be solved by the invention]
The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a method for controlling a rice seed infectious disease which has no wastewater treatment problem, has a small variation in efficacy, and has a high effect.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present inventors have studied a method for controlling a rice seed infectious disease which has no waste liquid treatment problem and has a simple and high effect in a series of operations.
[0006]
As a result, after sowing rice seeds, by spraying a chemical solution on the seeded rice seeds, it was found that the onset of rice seed infectious diseases can be controlled stably and efficiently with a smaller amount of applied drug compared to conventional treatment methods. Was.
[0007]
Specifically, rice seeds soaked and germinated by a conventional method are sown in a nursery box, and after sowing, a chemical solution of the rice seed treatment pesticide is sprayed. The sprinkling timing may be either before or after soil covering, but a higher effect can be expected with the spraying process before soil covering. By adopting this treatment method, the problem of the waste liquid after the seeding treatment can be solved, and the infectious disease of rice seeds can be controlled in a series of flow operations.
[0008]
That is, the present invention provides a rice seed treatment method which solves the environmental problems of the rice seed disinfectant.
[0009]
Embodiment
Hereinafter, the present invention will be described in detail.
The present invention is a method for controlling rice seed infectious diseases.
[0010]
The rice seed disinfectant in the present invention is a chemical pesticide.
[0011]
Such a rice seed disinfectant is currently commercially available, a component consisting of ipconazole, prochloraz, pefurazoate, triflumizole, benomyl, thiuram, thiophanate methyl, fludioxonil, captan, thiabendazole, oxolinic acid, and cupric hydroxide And one or more agents containing
[0012]
The concentration of the spray liquid according to the present invention is not particularly limited, but the concentration of various chemicals may be lower than the concentration used for the low-concentration long-term (24 hours) dipping treatment.
[0013]
The amount of water to be sprayed is not particularly limited as long as the amount is sufficient for the seeds of rice seeds. It is.
[0014]
Next, the method for controlling rice seed infectious diseases of the present invention will be described. The control method of the present invention is characterized in that a rice seed disinfectant is sprayed at the time of sowing.
[0015]
The method for controlling rice seed infectious diseases of the present invention can effectively control rice seed infectious diseases by spraying at the time of sowing.
[0016]
【Example】
Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the following examples at all, and without departing from the gist of the present invention, the type and formulation of the seed disinfectant Can be freely changed in the composition ratio, dosage form, and the like. In the following Examples and Comparative Examples, commercially available Sportac (prochloraz) emulsion and Techlead C (ipconazole + cupric hydroxide) flowable agent were used.
[0017]
A) Rice baka seedling disease control effect test (Example 1)
Prochloraz emulsion (Sporttac 25.0% emulsion: Nissan Chemical Industries) was used. Rice seeds were immersed and germinated in a usual manner and sown on Ube granular soil. Prior to soil covering, a 1000-fold diluted prochloraz emulsion was sprayed uniformly by hand spraying. The spraying liquid volume was 100 ml per nursery box.
[0018]
(Comparative Example 1)
As a comparative example, rice seeds were immersed in a 1000-fold diluted solution of the prochloraz emulsion used in Example 1 at 15 ° C. for 24 hours. After the treatment, the rice seeds were immersed in tap water at an integrated temperature of 100 ° C. as a guide, and then germinated at 30 ° C. for one day. After sowing, the seedlings were germinated at 30 ° C. for 2 days and then raised in a greenhouse. In the non-treated section, the same operation as in Example 1 and Comparative Example 1 was performed except that the chemical treatment was not performed.
[0019]
(Example 2)
Ipconazole + cupric hydroxide flowable agent (Techlead C5.0 + 4.6% flowable agent: Kumiai Chemical Industry) was used. By a conventional method, 150 g of rice seeds were immersed and germinated, and sown on Ube granular soil. Before covering the soil, a 200-fold diluted chemical solution of ipconazole + a cupric hydroxide flowable agent was evenly sprayed with a hand spray. The spraying liquid volume was 100 ml per nursery box.
[0020]
(Comparative Example 2)
As a comparative example, 150 g of rice seeds was immersed in 300 ml of a 200-fold diluted solution of ipconazole + cupric hydroxide flowable agent used in Example 2 at 15 ° C for 24 hours. After the treatment, the rice seeds were immersed in tap water at an integrated temperature of 100 ° C. as a guide, and then germinated at 30 ° C. for 1 day. After sowing, the seedlings were seeded at 30 ° C. for 2 days, and then raised in a greenhouse. In the case of no treatment, the same operation as in Example 2 and Comparative Example 2 was performed except that no chemical treatment was performed.
[0021]
Survey method)
When the rice seedlings reached the 2-3 leaf stage, the incidence of rice stunt seedling disease was investigated according to the following criteria. The results are shown in Table 1.
Rate of rice birch seedling disease-causing seedlings (%) = (number of seedlings / (number of seedlings + number of healthy seedlings)) × 100
[0022]
Example results)
Tables show the experimental results of the examples and the comparative examples. In Example 1, as in the test example of Comparative Example 1, a high control value was obtained against rice blight seedling disease. Also, as shown in Comparative Example 2, even when a high control value was not obtained by the normal soaking treatment method, a high control value was obtained by the spraying method at the time of sowing of Example 2. Was. From these test results, it was shown that the spraying method at the time of sowing is an effective and promising processing method.
[Table 1]
[0023]
【The invention's effect】
As described above, according to the present invention, there is no waste liquid treatment problem, and equipment of a large-scale seed treatment facility such as a rice nursery center can be effectively used. The present invention provides a method for controlling rice seed infectious diseases, which can control rice.
Claims (4)
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005272412A (en) * | 2004-03-26 | 2005-10-06 | Sumitomo Chemical Co Ltd | Use of benzimidazole-based antibacterial compound as active component of irrigation liquid for control of leaf blast of seedling |
JP2007332058A (en) * | 2006-06-13 | 2007-12-27 | Hokko Chem Ind Co Ltd | Seed disinfectant |
CN102057927A (en) * | 2011-01-08 | 2011-05-18 | 陕西美邦农药有限公司 | Bactericidal composition containing captan and triazole compounds |
CN101496519B (en) * | 2009-03-11 | 2011-11-23 | 陕西韦尔奇作物保护有限公司 | Composition containing JS399-19 and thiophonate-methyl |
JP2013173733A (en) * | 2012-01-24 | 2013-09-05 | Sumitomo Chemical Co Ltd | Plant disease control composition and control method of plant disease |
JP2013173734A (en) * | 2012-01-25 | 2013-09-05 | Sumitomo Chemical Co Ltd | Plant disease control composition and control method of plant disease |
CN104094937A (en) * | 2014-06-25 | 2014-10-15 | 广东中迅农科股份有限公司 | Sterilization composition containing triflumizole and fludioxonil |
CN106719692A (en) * | 2016-12-28 | 2017-05-31 | 联保作物科技有限公司 | A kind of paddy rice suspension seed-coating agent of ipconazole-containinpesticide and fludioxonil |
-
2002
- 2002-12-06 JP JP2002355312A patent/JP2004189601A/en active Pending
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005272412A (en) * | 2004-03-26 | 2005-10-06 | Sumitomo Chemical Co Ltd | Use of benzimidazole-based antibacterial compound as active component of irrigation liquid for control of leaf blast of seedling |
JP2007332058A (en) * | 2006-06-13 | 2007-12-27 | Hokko Chem Ind Co Ltd | Seed disinfectant |
CN101496519B (en) * | 2009-03-11 | 2011-11-23 | 陕西韦尔奇作物保护有限公司 | Composition containing JS399-19 and thiophonate-methyl |
CN102057927A (en) * | 2011-01-08 | 2011-05-18 | 陕西美邦农药有限公司 | Bactericidal composition containing captan and triazole compounds |
JP2013173733A (en) * | 2012-01-24 | 2013-09-05 | Sumitomo Chemical Co Ltd | Plant disease control composition and control method of plant disease |
JP2013173734A (en) * | 2012-01-25 | 2013-09-05 | Sumitomo Chemical Co Ltd | Plant disease control composition and control method of plant disease |
US9386771B2 (en) | 2012-01-25 | 2016-07-12 | Sumitomo Chemical Company, Limited | Plant disease control composition |
CN104094937A (en) * | 2014-06-25 | 2014-10-15 | 广东中迅农科股份有限公司 | Sterilization composition containing triflumizole and fludioxonil |
CN104094937B (en) * | 2014-06-25 | 2016-09-14 | 广东中迅农科股份有限公司 | A kind of containing fluorine bacterium azoles and the bactericidal composition of CGA-173506 |
CN106719692A (en) * | 2016-12-28 | 2017-05-31 | 联保作物科技有限公司 | A kind of paddy rice suspension seed-coating agent of ipconazole-containinpesticide and fludioxonil |
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