JP4333120B2 - Rice bacterial disease control agent for seed treatment - Google Patents

Rice bacterial disease control agent for seed treatment Download PDF

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JP4333120B2
JP4333120B2 JP2002317740A JP2002317740A JP4333120B2 JP 4333120 B2 JP4333120 B2 JP 4333120B2 JP 2002317740 A JP2002317740 A JP 2002317740A JP 2002317740 A JP2002317740 A JP 2002317740A JP 4333120 B2 JP4333120 B2 JP 4333120B2
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Prior art keywords
rice
control agent
seed
copper sulfate
bacterial
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JP2004149473A (en
Inventor
幸男 小栗
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Sumitomo Chemical Co Ltd
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Sumitomo Chemical Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、硫酸銅と炭酸水素ナトリウムとを有効成分として含有することを特徴とするイネ細菌病害防除用種子処理剤、及び硫酸銅と炭酸水素ナトリウムとの有効量をイネ種子に処理することを特徴とするイネ細菌病害の防除方法に関する。
【0002】
【従来の技術】
塩基性硫酸銅と炭酸水素ナトリウムとを含有する組成物がイネごま葉枯病、イネいもち病及びイネ紋枯病に具体的効果を有することが知られている。(例えば、特許文献1参照)
【特許文献1】
特開昭55−27164号公報(第3頁右下欄第1行〜2行)
【0003】
【発明が解決しようとする課題】
本発明は、硫酸銅と炭酸水素ナトリウムとを含有する組成物のイネ細菌病害防除用途を提供することを課題とする。
【0004】
【課題を解決するための手段】
本発明者は硫酸銅と炭酸水素ナトリウムとを含有する組成物の用途につき、種々検討を行った。その結果、該組成物をイネ種子処理に使用した場合に、イネ細菌病害に対して硫酸銅又は炭酸水素ナトリウムを単独で使用したときと比較して、相乗的な協力作用を発揮することにより、各々の処理薬量を低減できること;また該組成物をイネ種子処理に使用すると、硫酸銅単独で使用した場合に生じることがある薬害を軽減できることを見出し、本発明を完成した。
【0005】
すなわち、本発明は、硫酸銅と炭酸水素ナトリウムとを有効成分として含有することを特徴とする種子処理用イネ細菌病害防除剤(以下、本発明防除剤と記す。)、及び硫酸銅と炭酸水素ナトリウムとの有効量をイネ種子に処理することを特徴とするイネ細菌病害の防除方法を提供する。
【0006】
【発明の実施の形態】
本発明防除剤が効力を発揮するイネ細菌病害としては、例えばもみ枯細菌病菌(Burkholderia glumae)によって引き起こされる苗腐敗症、苗立枯細菌病菌(Burkholderia plantarii)によって引き起こされる苗立枯細菌病が挙げられる。
【0007】
本発明防除剤は、硫酸銅と炭酸水素ナトリウムとを有効成分として含有することを特徴とする。
本発明防除剤において、硫酸銅と炭酸水素ナトリウムとの重量比は硫酸銅1重量部に対して炭酸水素ナトリウムが通常0.2〜100重量部の割合、好ましくは0.4〜50重量部の割合である。
【0008】
本発明防除剤は硫酸銅と炭酸水素ナトリウムとの混合物そのものであってもよく、場合によってはさらに固体担体、液体担体等と混合し、必要により界面活性剤その他の製剤用補助剤を添加して、粉剤、水和剤、フロアブル剤、液剤等に製剤化されている。
これらの製剤は硫酸銅と炭酸水素ナトリウムとを合計量にして通常0.001〜99重量%含有する。
【0009】
製剤化の際に用いられる固体担体としては、例えば粘土類(カオリンクレー、アッタパルジャイトクレー、珪藻土、ベントナイト、フバサミクレー、酸性白土等)、タルク、合成含水酸化珪素、及びその他の無機物(セリサイト、石英、硫黄、活性炭、酸化カルシウム、水和シリカ等)の粒状物及び粉状物が挙げられ、液体担体としては例えば水が挙げられる。
【0010】
界面活性剤としては、例えばアルキル硫酸エステル塩、アルキルアリールスルホン酸塩、ジアルキルスルホコハク酸塩、ポリオキシエチレンアルキルアリールエーテルリン酸エステル塩、リグニンスルホン酸塩、ナフタレンスルホン酸ホルマリン縮合物等の陰イオン界面活性剤、ポリオキシエチレンアルキルアリールエーテル、ポリオキシエチレンアルキルポリオキシプロピレンブロックコポリマー、ソルビタン脂肪酸エステル等の非イオン界面活性剤等があげられる。
その他の製剤用補助剤としては、例えばポリビニルアルコ−ル、ポリビニルピロリドン等の水溶性高分子;アラビアガム、アルギン酸またはその塩、CMC(カルボキシメチルセルロ−ス)、ザンサンガム等の多糖類;アルミニウムマグネシウムシリケート、アルミナゾル等の無機物;防腐剤;着色剤;PAP(酸性リン酸イソプロピル)、BHT等の安定剤等があげられる。
【0011】
本発明防除剤は、その製剤形態によっては硫酸銅を製剤化したものと、炭酸水素ナトリウムを製剤化したものとを混合することによっても調製することができ、また処理直前に混用することもできる。
【0012】
本発明防除剤をイネ種子に処理する方法は、有効成分である硫酸銅と炭酸水素ナトリウムとがイネ種子に接触する方法であればよく、例えば本発明防除剤をイネ種子に散布処理する方法(種子吹き付け処理)、本発明防除剤にイネ種子を浸漬処理する方法、本発明防除剤をイネ種子に粉衣処理する方法が挙げられる。
【0013】
本発明防除剤をイネ種子に散布処理する方法としては、例えば本発明防除剤の製剤を水で希釈してイネ種子にスプレー機等を用いて散布する方法が挙げられる。この場合、散布液の有効成分濃度は通常0.5〜20重量%、好ましくは1〜4重量%であり、散布量は通常イネ種子1kgあたり有効成分量として通常0.001〜50gの割合である。
【0014】
本発明防除剤にイネ種子を浸漬処理する方法としては、例えば本発明防除剤の製剤の水希釈液にイネ種子を浸漬する方法が挙げられる。この場合、イネ種子を浸漬する処理液の有効成分濃度は通常0.001〜4重量%、好ましくは0.005重量%〜2重量%であり、浸漬時間は通常約10分間〜約24時間の範囲である。
【0015】
本発明防除剤をイネ種子に粉衣処理する方法としては、例えば少量の水で湿らせたイネ種子と、粉状に製剤化された本発明防除剤とを混合する方法が挙げられる。この場合に用いられる本発明防除剤の有効成分濃度は通常0.5〜80重量%、好ましくは1〜30重量%であり、本発明防除剤の処理量はイネ種子1kgあたり有効成分量として通常0.001〜50gの割合である。
【0016】
本発明のイネ細菌病害の防除方法は、通常有効量の硫酸銅と炭酸水素ナトリウムとを含有する本発明防除剤をイネ種子に上記の方法で処理することにより行われる。
【0017】
本発明防除剤は、他の殺虫剤、殺菌剤等と共に用いることができる。
かかる殺菌剤の有効成分としては、例えば5−エチル−5,8−ジヒドロ−8−オキソ[1,3]ジオキソロ[4,5−g]キノリン−7−カルボン酸(一般名:オキソリニック酸)が挙げられる。
【0018】
【実施例】
以下、製剤例及び試験例等により本発明をさらに詳しく説明するが、本発明は以下の例に限定されるものではない。
【0019】
製剤例1
硫酸銅7.7部、炭酸水素ナトリウム12部、リグニンスルホン酸カルシウム3部、ラウリル硫酸ナトリウム2部及び合成含水酸化珪素75.3部をよく粉砕混合することにより水和剤を得る。
【0020】
製剤例2
硫酸銅11.6部、炭酸水素ナトリウム25部、リグニンスルホン酸カルシウム3部、ラウリル硫酸ナトリウム2部及び合成含水酸化珪素58.4部をよく粉砕混合することにより水和剤を得る。
【0021】
製剤例3
硫酸銅0.8部、炭酸水素ナトリウム0.3部、カオリンクレー88.9部及びタルク10部をよく粉砕混合することにより粉剤を得る。
【0022】
次に、本発明防除剤の効力を試験例により示す。
試験例1
イネ種子をもみ枯細菌病菌(Burkholderia glumae)懸濁液(1×108cfu/ml)に4時間浸漬した。このイネ種子を1日間風乾し、もみ枯細菌病に感染したイネ種子を作成した。このイネ種子20重量部と、もみ枯細菌病に感染していないイネ種子80重量部とを混合して、試験用イネ種子を準備した。
一方、硫酸銅と炭酸水素ナトリウムとを所定濃度となるように水に溶解し、試験用薬液を調製した。試験用薬液20mlに室温で前記試験用イネ種子10gを10分間浸漬した後、1日間風乾した。
このイネ種子を通常の栽培方法(浸種処理:23℃で3日間、催芽処理:30℃で1日間、出芽処理:30℃で3日間)で出芽させた後、温室(昼間:24℃、夜間19℃)内で10日間栽培した。その後、苗の発病の有無を観察し、発病苗率を算出した。また、苗の薬害を以下の基準で調査した。

Figure 0004333120
結果を表1に示す。
【0023】
【表1】
Figure 0004333120
【0024】
試験例2
イネ種子を苗立枯細菌病菌(Burkholderia plantarii)懸濁液(1×108cfu/ml)に4時間浸漬した。このイネ種子を1日間風乾し、苗立枯細菌病に感染したイネ種子を作成した。このイネ種子10重量部と、苗立枯細菌病に感染していないイネ種子90重量部とを混合して、試験用イネ種子を準備した。
一方、硫酸銅と炭酸水素ナトリウムとを所定濃度となるように水に溶解し、試験用薬液を調製した。試験用薬液20mlに室温で前記試験用イネ種子10gを10分間浸漬した後、1日間風乾した。
このイネ種子を通常の栽培方法(浸種処理:23℃で3日間、催芽処理:30℃で1日間、出芽処理:30℃で3日間)で出芽させた後、温室(昼間:24℃、夜間:19℃)内で10日間栽培した。その後、苗の発病の有無を観察し、発病苗率を算出した。また、苗の薬害を以下の基準で調査した。
Figure 0004333120
結果を表2に示す。
【0025】
【表2】
Figure 0004333120
【0026】

培土を入れた直径16cm(1/5000are)のポットに2.5葉期のイネ苗を移植し、温室(昼間:25℃、夜間:20℃)内で60日間生育させた。一方、硫酸銅と炭酸水素ナトリウムとを所定濃度となるように水に溶解し、試験用薬液を調製した。
この試験用薬液を150L/10areの割合でイネに茎葉散布した。イネを風乾した後、もみ枯細菌病懸濁液(5×108cfu/ml)を10ml/ポットの割合で散布した。その後、このイネを多湿の温室(所定間隔で霧状の水を供給、昼間:25℃、夜間:20℃)で1日間、さらに通常の湿度の温室(昼間:25℃、夜間:20℃)で14日間栽培した。
その後、イネの穂のもみの発病を調査し、発病もみ率を算出した。
結果を表3に示す。
【0027】
【表3】
Figure 0004333120
【0028】
【発明の効果】
本発明防除剤をイネ種子に処理することにより、イネ細菌病害を防除することができる。[0001]
BACKGROUND OF THE INVENTION
The present invention comprises a seed treatment agent for controlling rice bacterial diseases characterized by containing copper sulfate and sodium bicarbonate as active ingredients, and treating rice seeds with an effective amount of copper sulfate and sodium bicarbonate. The present invention relates to a characteristic method for controlling rice bacterial diseases.
[0002]
[Prior art]
It is known that a composition containing basic copper sulfate and sodium hydrogen carbonate has specific effects on rice sesame leaf blight, rice blast and rice blight. (For example, see Patent Document 1)
[Patent Document 1]
JP 55-27164 (page 3, lower right column, lines 1 to 2)
[0003]
[Problems to be solved by the invention]
This invention makes it a subject to provide the rice bacterial disease control use of the composition containing copper sulfate and sodium hydrogencarbonate.
[0004]
[Means for Solving the Problems]
The present inventor conducted various studies on the use of the composition containing copper sulfate and sodium hydrogen carbonate. As a result, when the composition is used for rice seed treatment, it exhibits a synergistic synergistic action as compared to when copper sulfate or sodium bicarbonate is used alone for rice bacterial diseases, The present inventors have found that the amount of each treatment can be reduced; and that the use of the composition for rice seed treatment can alleviate phytotoxicity that may occur when copper sulfate alone is used, thereby completing the present invention.
[0005]
That is, the present invention contains a rice bacterial disease control agent for seed treatment (hereinafter referred to as the present invention control agent) characterized by containing copper sulfate and sodium hydrogen carbonate as active ingredients, and copper sulfate and hydrogen carbonate. Provided is a method for controlling rice bacterial diseases characterized by treating rice seeds with an effective amount of sodium.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Examples of rice bacterial diseases for which the control agent of the present invention exhibits efficacy include seed rot caused by Burkholderia glumae, and bacterial wilt caused by Burkholderia plantarii. It is done.
[0007]
The control agent of the present invention contains copper sulfate and sodium hydrogen carbonate as active ingredients.
In the control agent of the present invention, the weight ratio of copper sulfate to sodium hydrogen carbonate is usually 0.2 to 100 parts by weight, preferably 0.4 to 50 parts by weight of sodium hydrogen carbonate relative to 1 part by weight of copper sulfate. It is a ratio.
[0008]
The control agent of the present invention may be a mixture of copper sulfate and sodium hydrogencarbonate itself. In some cases, the control agent may be further mixed with a solid carrier, a liquid carrier, etc., and if necessary, a surfactant or other formulation adjuvant may be added. , Powders, wettable powders, flowables, liquids, etc.
These preparations usually contain 0.001 to 99% by weight of copper sulfate and sodium hydrogen carbonate as a total amount.
[0009]
Examples of solid carriers used in the formulation include clays (kaolin clay, attapulgite clay, diatomaceous earth, bentonite, fusami clay, acidic clay), talc, synthetic silicon hydroxide, and other inorganic substances (sericite, Quartz, sulfur, activated carbon, calcium oxide, hydrated silica, and the like), and examples of the liquid carrier include water.
[0010]
Examples of surfactants include anionic interfaces such as alkyl sulfate esters, alkylaryl sulfonates, dialkyl sulfosuccinates, polyoxyethylene alkylaryl ether phosphates, lignin sulfonates, and naphthalene sulfonate formalin condensates. Nonionic surfactants such as activators, polyoxyethylene alkyl aryl ethers, polyoxyethylene alkyl polyoxypropylene block copolymers, sorbitan fatty acid esters, and the like.
Other adjuvants for preparation include, for example, water-soluble polymers such as polyvinyl alcohol and polyvinyl pyrrolidone; polysaccharides such as gum arabic, alginic acid or salts thereof, CMC (carboxymethyl cellulose) and xanthan gum; aluminum magnesium silicate And inorganic substances such as alumina sol; antiseptics; colorants; stabilizers such as PAP (isopropyl acid phosphate) and BHT.
[0011]
The control agent of the present invention can be prepared by mixing copper sulfate formulated with sodium bicarbonate and depending on the formulation form, and can also be mixed immediately before treatment. .
[0012]
The method for treating the rice seed with the present control agent may be any method in which copper sulfate and sodium hydrogen carbonate, which are the active ingredients, are in contact with the rice seed. For example, a method for spraying the present control agent on the rice seed ( Seed spraying treatment), a method of immersing rice seeds in the present control agent, and a method of dressing the present control agent on rice seeds.
[0013]
Examples of the method of spraying the rice control agent on rice seeds include a method of diluting the preparation of the control agent of the invention with water and spraying the rice seeds using a sprayer or the like. In this case, the active ingredient concentration of the spray liquid is usually 0.5 to 20% by weight, preferably 1 to 4% by weight, and the spray amount is usually 0.001 to 50 g as an active ingredient amount per 1 kg of rice seeds. is there.
[0014]
Examples of the method for immersing rice seeds in the control agent of the present invention include a method of immersing rice seeds in an aqueous dilution of the preparation of the control agent of the present invention. In this case, the active ingredient concentration of the treatment liquid for immersing the rice seed is usually 0.001 to 4% by weight, preferably 0.005% to 2% by weight, and the immersion time is usually about 10 minutes to about 24 hours. It is a range.
[0015]
Examples of the method for dressing rice seeds with the present control agent include a method of mixing rice seeds moistened with a small amount of water and the present control agent formulated in a powder form. The active ingredient concentration of the control agent of the present invention used in this case is usually 0.5 to 80% by weight, preferably 1 to 30% by weight, and the treatment amount of the control agent of the present invention is usually as the amount of active ingredient per kg of rice seed The ratio is 0.001 to 50 g.
[0016]
The rice bacterial disease control method of the present invention is usually carried out by treating rice seeds with the above-mentioned control agent containing an effective amount of copper sulfate and sodium hydrogencarbonate by the above method.
[0017]
The control agent of the present invention can be used together with other insecticides, fungicides and the like.
As an active ingredient of such a fungicide, for example, 5-ethyl-5,8-dihydro-8-oxo [1,3] dioxolo [4,5-g] quinoline-7-carboxylic acid (generic name: oxolinic acid) is used. Can be mentioned.
[0018]
【Example】
Hereinafter, the present invention will be described in more detail with reference to formulation examples and test examples, but the present invention is not limited to the following examples.
[0019]
Formulation Example 1
A wettable powder is obtained by thoroughly pulverizing and mixing 7.7 parts of copper sulfate, 12 parts of sodium hydrogen carbonate, 3 parts of calcium lignin sulfonate, 2 parts of sodium lauryl sulfate and 75.3 parts of synthetic silicon hydroxide.
[0020]
Formulation Example 2
A wettable powder is obtained by thoroughly pulverizing and mixing 11.6 parts of copper sulfate, 25 parts of sodium hydrogen carbonate, 3 parts of calcium lignin sulfonate, 2 parts of sodium lauryl sulfate and 58.4 parts of synthetic hydrous silicon oxide.
[0021]
Formulation Example 3
A powder is obtained by thoroughly pulverizing and mixing 0.8 parts of copper sulfate, 0.3 parts of sodium hydrogen carbonate, 88.9 parts of kaolin clay and 10 parts of talc.
[0022]
Next, the effectiveness of the control agent of the present invention is shown by test examples.
Test example 1
Rice seeds were immersed in a Burkholderia glumae suspension (1 × 10 8 cfu / ml) for 4 hours. The rice seeds were air-dried for 1 day to prepare rice seeds infected with the bacterial wilt disease. A test rice seed was prepared by mixing 20 parts by weight of the rice seeds and 80 parts by weight of rice seeds not infected with the bacterial wilt disease.
On the other hand, copper sulfate and sodium hydrogen carbonate were dissolved in water to a predetermined concentration to prepare a test chemical solution. The test rice seed 10 g was immersed in 20 ml of the test chemical at room temperature for 10 minutes, and then air-dried for 1 day.
The rice seeds were germinated by the usual cultivation method (immersion treatment: 3 days at 23 ° C., germination treatment: 1 day at 30 ° C., germination treatment: 3 days at 30 ° C.) and then greenhouse (daytime: 24 ° C., nighttime). (19 ° C.) for 10 days. Thereafter, the presence or absence of seedlings was observed, and the diseased seedling rate was calculated. In addition, phytotoxicity of seedlings was investigated according to the following criteria.
Figure 0004333120
The results are shown in Table 1.
[0023]
[Table 1]
Figure 0004333120
[0024]
Test example 2
Rice seeds were dipped in a Burkholderia plantarii suspension (1 × 10 8 cfu / ml) for 4 hours. The rice seeds were air-dried for 1 day to prepare rice seeds infected with seedling blight. A test rice seed was prepared by mixing 10 parts by weight of this rice seed and 90 parts by weight of rice seed not infected with the seedling blight disease.
On the other hand, copper sulfate and sodium hydrogen carbonate were dissolved in water to a predetermined concentration to prepare a test chemical solution. The test rice seed 10 g was immersed in 20 ml of the test chemical at room temperature for 10 minutes, and then air-dried for 1 day.
The rice seeds were germinated by the usual cultivation method (immersion treatment: 3 days at 23 ° C., germination treatment: 1 day at 30 ° C., germination treatment: 3 days at 30 ° C.) and then greenhouse (daytime: 24 ° C., nighttime). : 19 ° C.) for 10 days. Thereafter, the presence or absence of seedlings was observed, and the diseased seedling rate was calculated. In addition, phytotoxicity of seedlings was investigated according to the following criteria.
Figure 0004333120
The results are shown in Table 2.
[0025]
[Table 2]
Figure 0004333120
[0026]
Rice seedlings at the 2.5 leaf stage were transplanted into pots having a diameter of 16 cm (1/5000 are) containing the example soil and grown in a greenhouse (daytime: 25 ° C., night time: 20 ° C.) for 60 days. On the other hand, copper sulfate and sodium hydrogen carbonate were dissolved in water to a predetermined concentration to prepare a test chemical solution.
This test chemical was sprayed on the rice at a rate of 150 L / 10 are. After the rice was air-dried, a rice wilt bacterial suspension (5 × 10 8 cfu / ml) was sprayed at a rate of 10 ml / pot. After that, the rice is kept in a humid greenhouse (mist water is supplied at predetermined intervals, daytime: 25 ° C, nighttime: 20 ° C) for 1 day, and a normal humidity greenhouse (daytime: 25 ° C, nighttime: 20 ° C) And cultivated for 14 days.
Then, the incidence of rice ear fir was investigated, and the incidence fir rate was calculated.
The results are shown in Table 3.
[0027]
[Table 3]
Figure 0004333120
[0028]
【The invention's effect】
Rice bacterial diseases can be controlled by treating rice seeds with the control agent of the present invention.

Claims (4)

硫酸銅と炭酸水素ナトリウムとを有効成分として含有することを特徴とする種子処理用イネ細菌病害防除剤。A rice bacterial disease control agent for seed treatment, comprising copper sulfate and sodium hydrogen carbonate as active ingredients. イネ細菌病害がもみ枯細菌病菌によって引き起こされる苗腐敗症又は苗立枯細菌病菌によって引き起こされる苗立枯細菌病である請求項1記載のイネ細菌病害防除剤。The rice bacterial disease control agent according to claim 1, wherein the rice bacterial disease is a seed rot caused by a rice blast fungus or a seedling bacterial bacterium caused by a seed bacterial bacterium. 硫酸銅と炭酸水素ナトリウムとの有効量をイネ種子に処理することを特徴とするイネ細菌病害の防除方法。A method for controlling rice bacterial diseases, comprising treating rice seeds with an effective amount of copper sulfate and sodium bicarbonate. イネ細菌病害がもみ枯細菌病菌によって引き起こされる苗腐敗症又は苗立枯細菌病菌によって引き起こされる苗立枯細菌病である請求項3記載のイネ細菌病害の防除方法。4. The method for controlling a rice bacterial disease according to claim 3, wherein the rice bacterial disease is a seed rot caused by a rice blast fungus or a seedling bacterial bacterium caused by a seed bacterium.
JP2002317740A 2002-10-31 2002-10-31 Rice bacterial disease control agent for seed treatment Expired - Fee Related JP4333120B2 (en)

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