JP2005068024A - Method for disinfecting rice plant seed - Google Patents
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Abstract
Description
【０００１】
【発明の属する技術分野】
本発明は、イネ種子の消毒方法等に関する。
【０００２】
【従来の技術】
水稲栽培においては発芽をそろえ種子伝染性病害を防除するために、播種前にイネ種子を薬剤により消毒（種子消毒処理）した後、浸種処理、続いて催芽処理が行われている。
【発明が解決しようとする課題】
しかしながら、イネ種子を薬剤により消毒しても、当該薬剤が抗菌力に比べて殺菌力に劣るとか、当該薬剤に耐性を有する病原菌が存在する等の原因が複数重なり、イネの育苗期における種子伝染性病害の発生を必ずしも十分に抑制することができない場合があった。
また、芥子、山葵等の成分が抗菌活性を有することは古くから知られているが、当該成分は極めて強い刺激性を有するために、その利用方法は限られており、今までにイネ種子の種子消毒剤としての使用については何らの報告もなされていない。
【特許文献１】
特開２０００−８６４１４
【０００３】
【課題を解決するための手段】
このような状況下、本発明者らは、イネの育苗期における種子伝染性病害の発生を抑制するイネ種子の消毒方法について種々鋭意検討した結果、刺激性辛味成分を有する植物性香辛材を限定された時期に使用することにより、イネの育苗期における種子伝染性病害の発生を十分に抑制することを見出し、本発明に至った。
【０００４】
即ち、本発明は、
１．刺激性辛味成分を有する植物性香辛材を含有する薬剤に、浸種前のイネ種子を催芽させることなく接触させることを特徴とするイネの種子消毒方法（以下、本発明方法と記すこともある。）；
２．刺激性辛味成分を有する植物性香辛材を含有する薬剤が、刺激性辛味成分を有する植物性香辛材を含有する水懸濁液又は水溶液であり、かつ、浸種前のイネ種子を催芽させることなく接触させる方法が、前記薬剤に浸種前のイネ種子を催芽させることなく浸漬する方法であることを特徴とする前項１記載のイネの種子消毒方法；
３．前記薬剤に浸種前のイネ種子を催芽させることなく浸漬する時間が１２〜４８時間であることを特徴とする前項２のイネ種子の消毒方法；
４．刺激性辛味成分を有する植物性香辛材を含有する薬剤が、刺激性辛味成分を有する植物性香辛材を含有する水懸濁液又は水溶液であり、かつ、浸種前のイネ種子を催芽させることなく接触させる方法が、前記薬剤を浸種前のイネ種子に吹き付ける又は塗沫する方法であることを特徴とする前項１のイネ種子の消毒方法；
５．刺激性辛味成分を有する植物性香辛材を含有する薬剤が、刺激性辛味成分を有する植物性香辛材を含有する粉状物であり、かつ、浸種前のイネ種子を催芽させることなく接触させる方法が、前記薬剤を浸種前のイネ種子に付着させる方法であることを特徴とする前項１のイネ種子の消毒方法；
６．刺激性辛味成分を有する植物性香辛材が、芥子由来の植物性香辛物であることを特徴とする前項１〜５記載のイネ種子の消毒方法；
７．刺激性辛味成分を有する植物性香辛材が、山葵由来の植物性香辛物であることを特徴とする前項１〜５記載のイネ種子の消毒方法；
８．芥子由来の植物性香辛物が、粉末状からし又はペースト状からしであることを特徴とする前項６記載のイネ種子の消毒方法；
９．山葵由来の植物性香辛物が、粉末状わさび、ペースト状わさび又は摩り下ろしわさび汁であることを特徴とする前項７記載のイネ種子の消毒方法；
１０．刺激性辛味成分を有する植物性香辛材を含有する水懸濁液又は水溶液からなることを特徴とするイネ種子の消毒液剤（以下、本液剤と記すこともある。）；
１１．刺激性辛味成分を有する植物性香辛材を含有する粉状物からなることを特徴とするイネ種子の消毒粉剤（以下、本粉剤と記すこともある。）；
等を提供するものである。
【０００５】
【発明の実施の形態】
本発明方法は、刺激性辛味成分を有する植物性香辛材を含有する薬剤に、浸種前のイネ種子を催芽させることなく接触させることを特徴とする。特に、刺激性辛味成分を有する植物性香辛材を含有する薬剤が、刺激性辛味成分を有する植物性香辛材を含有する水懸濁液又は水溶液であり、かつ、浸種前のイネ種子を催芽させることなく接触させる方法が、前記薬剤に浸種前のイネ種子を催芽させることなく浸漬する方法であることを特徴とする前記のイネの種子消毒方法が好まし
い。
【０００６】
本発明方法において用いられる「刺激性辛味成分を有する植物性香辛材」（以下、本植物性香辛材と記すこともなる。）としては、例えば、芥子、山葵等由来の植物性香辛物をあげることができる。芥子の種類としては、和からし（Ｂｒａｓｓｉｃａ ｊｕｎｃｅａ）、黒からし（Ｂｒａｓｓｉｃａ ｎｉｇｒａ）、洋からし（Ｓｉｎａｐｉｓ ａｌｂａ）等があげられる。また山葵の種類としては、本わさび（Ｗａｓａｂｉａ ｊａｐｏｎｉｃａ）、西洋わさび（Ａｒｍｏｒａｃｉａ ｒｕｓｔｉｃａｎａ）等があげられる。
芥子、山葵等由来の植物性香辛物は、例えば、粉末状のものやペースト状のものを用いることができ、これらを水に均一に懸濁又は溶解して使用するとよい。粉末状のものとしては、例えば、凍結乾燥物、市販の粉わさびまたは粉からし等の乾燥物をあげることができる。ペースト状のものとしては、摩り下ろしたものや粉末状のものを水で練った後に加工したもの等をあげることができる。さらに、山葵については、根わさびを摩り下ろした後に得られる摩り下ろし汁を刺激性辛味成分を有する植物性香辛材として使用してもよい。
刺激性辛味成分を有する植物性香辛材は、上記のような植物性香辛物を少なくとも１種類を含むものであればよいが、複数種類を混合したものでもよい。
本発明方法に用いられる刺激性辛味成分を有する植物性香辛材には、必要に応じて、例えば、ポリオキシエチレンソルビタンモノラウレート、ポリオキシエチレンソルビタンモノオレート等の界面活性剤を適量含有させていてもよい。
【０００７】
本発明方法において用いられる刺激性辛味成分を有する植物性香辛材を含有する薬剤（以下、本薬剤と記すこともある。）は、刺激性辛味成分を有する植物性香辛材を含有する水懸濁液又は水溶液であってもよく、また刺激性辛味成分を有する植物性香辛材を含有する粉状物であってもよい。好ましくは前者をあげることができる。
【０００８】
本発明方法において用いられる刺激性辛味成分を有する植物性香辛材を含有する水懸濁液又は水溶液は、通常、水に植物性香辛材を、水の量に対して、例えば、０．０１〜１０重量％の割合で含有させることがよい。粉末状のものを用いる場合には、通常、水に植物性香辛材を、例えば、０．０１〜５重量％、好ましくは０．０５〜２重量％の割合で含有させることがよい。ペースト状のものを用いる場合には、通常、水に植物性香辛材を、水の量に対して、例えば、０．０２〜１０重量％、好ましくは０．１〜５重量％の割合で含有させることがよい。根わさびの摩り下ろし汁を用いる場合には、水に植物性香辛材を、水の量に対して０．０１〜２重量％の割合で含有させることがよい。
【０００９】
本発明方法において用いられる刺激性辛味成分を有する植物性香辛材を含有する水懸濁液又は水溶液の調製方法としては、通常、水に植物性香辛材を、前記のような所定濃度になるように加え、よく混合する方法があげられるが、一旦、高濃度の混合物を調製した後、水で希釈することにより再調製する方法もあげられる。
【００１０】
このように調製された本液剤に浸種前のイネ種子を催芽させることなく接触させる方法としては、当該薬剤に浸種前のイネ種子を催芽させることなく浸漬する方法や、当該薬剤を浸種前のイネ種子に吹き付ける又は塗沫する方法等をあげることができる。
【００１１】
例えば、前者の場合（浸漬法）には、本液剤にイネ種子を浸漬する際の温度は、通常、１０〜３０℃の範囲である。また、本液剤にイネ種子を浸漬する際の本液剤の量は、イネ種子が浸漬できる量であればよく、通常、イネ種子の重量に対して約１〜３倍量である。本液剤にイネ種子を浸漬する際の浸漬時間は、イネ種子を浸漬する際の温度にもよるが、通常、１２〜４８時間の範囲である。
【００１２】
本発明方法において用いられる刺激性辛味成分を有する植物性香辛材を含有する水懸濁液又は水溶液の調製方法としては、通常、水に植物性香辛材を、前記のような所定濃度になるように加え、よく混合する方法があげられるが、一旦、高濃度の混合物を調製した後、水で希釈することにより再調製する方法もあげられる。
【００１３】
また、例えば、後者の場合（吹き付け法、塗布法）には、本液剤をイネ種子に吹き付ける又は塗沫する際の本液剤の量は、通常、イネ種子の重量１ｋｇに対して１ｍｌ〜１００ｍｌであるが、好ましくは３ｍｌ〜３０ｍｌである。
【００１４】
本発明方法において用いられる刺激性辛味成分を有する植物性香辛材を含有する粉状物は、通常、当該粉状物中に、刺激性辛味成分を有する植物性香辛材を、例えば、０．０５重量％〜７０重量％、好ましくは０．１重量％〜５０重量％の割合で含有させることがよい。
【００１５】
このように調製された本粉剤に浸種前のイネ種子を催芽させることなく接触させる方法としては、当該薬剤を浸種前のイネ種子に付着させる方法等をあげることができる。当該薬剤のイネ種子への付着量は、イネ種子の重量当たり０．１重量％〜５重量％であり、好ましくは０．５重量％〜１重量％である。
【００１６】
本発明方法により種子消毒されたイネ種子は、定法に従って、浸種後催芽され続いて播種が行われる。播種は、通常、３０ｃｍ×６０ｃｍのイネ育苗箱に乾燥した籾量で８０ｇ〜２５０ｇの範囲内の量で行うとよい。通常、催芽させたイネ種子を土壌表面に撒き、当該イネ種子が隠れる程度に覆土する。
播種されたイネ種子は、約３０℃で２〜３日間多湿度条件下に放置すると出芽する。この育苗箱を約２０〜３０℃の条件で２週間〜４週間程度生育させることにより移植可能な苗に生育させる。尚、移植時のイネ苗の生育ステージは地域により大きく異なるが、乳苗移植では１．５葉期程度、中苗移植では２．５葉期程度、成苗移植では３．５葉期程度である。なお、出芽から移植可能時期までの期間が育苗期と呼ばれる期間である。
【００１７】
本発明方法により種子消毒されたイネ種子の場合には、イネの育苗に発生する種子伝染性病害の発生が十分に抑制される。かかる種子伝染性病害としては、ばか苗病、苗立枯病、苗いもち等があげられる。
【００１８】
【実施例】
以下、試験例等により本発明をさらに詳しく説明するが、本発明はこれらの例に限定されるものではない。
【００１９】
まず、本液剤の製造を下記の製造例に示す。
【００２０】
製造例１
０．２５ｇの粉末状わさびを容器に計り取った後、これに水を加えて全体で１００ｍｌにする。その後十分に撹拌混合し、０．２５重量％の本液剤を得る。
【００２１】
製造例２
０．２５ｇの粉末状からしを容器に計り取った後、これに水を加えて全体で１００ｍｌにする。その後十分に撹拌混合し、０．２５重量％の本液剤を得る。
【００２２】
製造例３
０．２５ｇのペースト状わさびを容器に計り取った後、これに水を加えて全体で１００ｍｌにする。その後十分に撹拌混合し、０．２５重量％の本液剤を得る。
【００２３】
製造例４
０．２５ｇのペースト状からしを容器に計り取った後、これに水を加えて全体で１００ｍｌにする。その後十分に撹拌混合し、０．２５重量％の本液剤を得る。
【００２４】
製造例５
１００ｇの根わさびを摩り下ろした後にガーゼでろ過して、絞り汁を摩り下ろしわさび汁として得る。０．２５ｍｌの摩り下ろし汁を容器に計り取った後、これに水を加えて全体で１００ｍｌにする。その後十分に撹拌混合し、０．２５重量％の本液剤を得る。
【００２５】
製造例６
２ｇの粉末状からしを容器に計り取った後、これに８ｇのタルクを加えてよく混合し、２０重量％の本粉剤を得る。
【００２６】
次に本液剤を用いた病害防除についての試験例を示す。
【００２７】
試験例１
ばか苗病菌に汚染されたイネの自然感染種子７ｇを、所定濃度に懸濁された市販の粉わさび又は粉からしの水懸濁液に、１５℃で２４時間浸漬した後、直ちにイネ種子重量（ｇ）の２倍量相当の水（水温１５℃）に３日間浸漬した。その後、浸漬されたイネ種子を３０℃で２４時間静置し、催芽させた。このようにして催芽させたイネ種子を育苗箱に播種した後、３０℃で３日間放置することにより出芽させ、さらに約２０〜３０℃のガラス温室内で３６日間栽培することにより苗に生育させた。調査の際には、生育したイネ苗を観察し、徒長した発病苗数と無発病苗数とを数え、下記の計算式により発病苗率を求め、防除価を算出した。
【００２８】
（計算式１）発病苗率（％）＝［（発病苗数）／｛（発病苗数）＋（無発病苗数）｝］×１００
【００２９】
（計算式２）防除価（％）＝１００×［１−｛（処理区の発病苗率）／（無処理区の発病苗率）｝］
【００３０】
結果を表１に示す。表１から明らかなように、本発明方法はばか苗病に対して高い防除効果を有していることが確認された。
【００３１】
【表１】
【発明の効果】
本発明方法により、イネの育苗期に発生する種子伝染性病害を十分に抑制することができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for disinfecting rice seeds.
[0002]
[Prior art]
In paddy rice cultivation, rice seeds are sterilized with chemicals (seed sterilization treatment) before seeding, followed by soaking treatment and sprouting treatment in order to arrange germination and control seed infectious diseases.
[Problems to be solved by the invention]
However, even if rice seeds are sterilized with chemicals, there are multiple causes such as the fact that the chemicals are inferior in bactericidal activity compared to antibacterial activity, or there are pathogenic bacteria that are resistant to the chemicals. In some cases, the occurrence of sexually transmitted diseases cannot always be sufficiently suppressed.
In addition, it has been known for a long time that ingredients such as eggplant and yam have antibacterial activity, but since the ingredient has extremely strong irritation, its use has been limited, and so far, There are no reports on its use as a seed disinfectant.
[Patent Document 1]
JP 2000-86414 A
[0003]
[Means for Solving the Problems]
Under such circumstances, the present inventors have made various studies on the method of disinfecting rice seeds to suppress the occurrence of seed infectious diseases during the rice seedling stage, and as a result, limited plant spices having stimulating pungent components. It was found that the occurrence of a seed infectious disease during the rice seedling stage was sufficiently suppressed by using it at the time when the rice was grown, and the present invention was achieved.
[0004]
That is, the present invention
1. Rice seed disinfection method (hereinafter referred to as the method of the present invention), characterized in that a rice seed before soaking is brought into contact with a drug containing a vegetable spice having an irritating pungent component without germination. );
2. The agent containing a vegetable spice having an irritating pungent component is a water suspension or an aqueous solution containing a vegetable spice having an irritating pungent component, and without germinating rice seeds before soaking The method for disinfecting rice seeds according to item 1 above, wherein the contacting method is a method of immersing rice seeds before soaking in the drug without causing germination;
3. The method for disinfection of rice seeds according to item 2 above, wherein the time for soaking without seeding rice seeds before soaking in the drug is 12 to 48 hours;
4). The agent containing a vegetable spice having an irritating pungent component is a water suspension or an aqueous solution containing a vegetable spice having an irritating pungent component, and without germinating rice seeds before soaking The method for disinfecting rice seeds according to item 1 above, wherein the contact method is a method of spraying or smearing the rice seeds before soaking with seeds;
5). A method in which a drug containing a vegetable spice having an irritating pungent ingredient is a powdery substance containing a vegetable spice having an irritating pungent ingredient, and the rice seeds before soaking are contacted without germination Is a method of disinfecting rice seeds according to item 1 above, wherein the agent is attached to rice seeds before soaking;
6). The method for disinfecting rice seeds according to the preceding items 1 to 5, wherein the vegetable spice having an irritating pungent component is a vegetable spice derived from eggplant;
7). The method for disinfecting rice seeds according to the preceding items 1 to 5, wherein the vegetable spice having an irritating pungent component is a vegetable spice derived from yam;
8). The method for disinfecting rice seeds according to item 6 above, wherein the vegetable spices derived from coconut are powdered mustard or pasty mustard;
9. The method for disinfecting rice seeds according to item 7 above, wherein the vegetable spice derived from yam is powdered wasabi, pasty wasabi or ground wasabi juice;
10. Disinfecting liquid for rice seeds (hereinafter sometimes referred to as the present liquid), comprising a water suspension or an aqueous solution containing a vegetable spice having an irritating pungent component;
11. Disinfecting powder of rice seeds (hereinafter sometimes referred to as the present powder) characterized by comprising a powdery substance containing a vegetable spice having an irritating pungent component;
Etc. are provided.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The method of the present invention is characterized by bringing a rice seed before soaking into contact with a drug containing a vegetable spice having an irritating pungent component without causing germination. In particular, the agent containing a vegetable spice having an irritating pungent component is an aqueous suspension or aqueous solution containing a vegetable spice having an irritating pungent component, and germinates rice seeds before soaking. The rice seed disinfection method described above is characterized in that the method without contact is a method of immersing rice seeds before soaking in the drug without germination.
[0006]
Examples of the “plant spice having an irritating pungent component” used in the method of the present invention (hereinafter also referred to as the present plant spice) are plant spices derived from eggplant, yam, and the like. be able to. Examples of the kind of the eggplant include Japanese mustard (Brassica juncea), black mustard (Brassica nigra), western mustard (Sinapis alba) and the like. In addition, examples of the types of yam include Wasabi japonica and Armoria rusticana.
As plant spices derived from eggplant, yam, etc., for example, powdered or paste-like ones can be used, and these may be used by uniformly suspending or dissolving them in water. Examples of the powdered material include lyophilized products, dried products such as commercially available powdered wasabi or powdered mustard. Examples of the paste-like material include those that have been ground down and those that have been processed after being kneaded with water. Furthermore, for yam, the soup obtained after grinding root wasabi may be used as a vegetable spice having an irritating pungent component.
The vegetable spicy material having an irritating pungent component may contain at least one kind of the above-mentioned vegetable spices, but may be a mixture of a plurality of kinds.
The vegetable spice having an irritating pungent component used in the method of the present invention contains an appropriate amount of a surfactant such as polyoxyethylene sorbitan monolaurate or polyoxyethylene sorbitan monooleate as necessary. May be.
[0007]
An agent containing a vegetable spice having an irritating pungent component used in the method of the present invention (hereinafter sometimes referred to as the present agent) is an aqueous suspension containing a vegetable pungent having an irritating pungent component. It may be a liquid or an aqueous solution, or may be a powder containing a vegetable spice having an irritating pungent component. Preferably, the former can be mentioned.
[0008]
The aqueous suspension or aqueous solution containing a vegetable spice having an irritating pungent component used in the method of the present invention is usually a vegetable spice in water, for example, 0.01 to It is good to make it contain in the ratio of 10 weight%. When using a powdery thing, it is usually good to contain a vegetable spice material in water, for example in the ratio of 0.01-5 weight%, Preferably 0.05-2 weight%. In the case of using a paste-like material, usually, the vegetable spice is contained in water at a ratio of, for example, 0.02 to 10% by weight, preferably 0.1 to 5% by weight, based on the amount of water. It is good to let them. In the case of using rooted wasabi juice, it is preferable to contain a vegetable spice in water at a ratio of 0.01 to 2% by weight with respect to the amount of water.
[0009]
As a method for preparing an aqueous suspension or aqueous solution containing a vegetable spice having an irritating pungent component used in the method of the present invention, the vegetable spice is usually added to water at a predetermined concentration as described above. In addition to the above, there is a method of mixing well, but there is also a method of once preparing a highly concentrated mixture and then re-preparing it by diluting with water.
[0010]
Examples of the method of bringing the seeds before sowing into contact with the liquid preparation thus prepared without germination include the method of immersing the seeds of rice before sowing in the agent without sprouting the rice seeds before sowing, Examples of the method include spraying or smearing seeds.
[0011]
For example, in the former case (immersion method), the temperature at which rice seeds are immersed in this solution is usually in the range of 10 to 30 ° C. Further, the amount of the present liquid agent when immersing rice seeds in this liquid agent may be an amount that allows rice seeds to be immersed, and is usually about 1 to 3 times the weight of rice seeds. The immersion time when immersing rice seeds in this solution is usually in the range of 12 to 48 hours, although it depends on the temperature when immersing rice seeds.
[0012]
As a method for preparing an aqueous suspension or aqueous solution containing a vegetable spice having an irritating pungent component used in the method of the present invention, the vegetable spice is usually added to water at a predetermined concentration as described above. In addition to the above, there is a method of mixing well, but there is also a method of once preparing a highly concentrated mixture and then re-preparing it by diluting with water.
[0013]
Further, for example, in the latter case (spraying method, coating method), the amount of the liquid agent when the liquid agent is sprayed or smeared on rice seed is usually 1 ml to 100 ml with respect to 1 kg of rice seed weight. However, it is preferably 3 ml to 30 ml.
[0014]
The powdery substance containing the vegetable spice having an irritating pungent component used in the method of the present invention usually contains a vegetable spice having an irritating pungent component in the powder, for example, 0.05. It is good to make it contain in the ratio of weight%-70 weight%, Preferably 0.1 weight%-50 weight%.
[0015]
Examples of a method of bringing the rice seed before sowing into contact with the powder thus prepared without germination include a method of attaching the agent to the rice seed before sowing. The amount of the drug attached to rice seeds is 0.1% to 5% by weight, preferably 0.5% to 1% by weight, based on the weight of the rice seeds.
[0016]
Rice seeds sterilized by the method of the present invention are sprouted after soaking according to a conventional method, followed by sowing. The seeding is usually performed in an amount within a range of 80 g to 250 g as a drought amount dried in a 30 cm × 60 cm rice seedling box. Usually, the germinated rice seeds are sown on the soil surface and covered with soil so that the rice seeds are hidden.
The seeded rice seeds germinate when left under high humidity conditions at about 30 ° C. for 2 to 3 days. The seedling box is grown at a temperature of about 20 to 30 ° C. for about 2 to 4 weeks to grow into a transplantable seedling. The growth stage of rice seedlings at the time of transplantation varies greatly from region to region, but about 1.5 leaf stage for breast seedling transplantation, about 2.5 leaf stage for medium seedling transplantation, and about 3.5 leaf stage for adult seedling transplantation. is there. The period from the emergence to the transplantable period is a period called the seedling raising period.
[0017]
In the case of rice seed sterilized by the method of the present invention, the occurrence of seed infectious diseases occurring in rice seedlings is sufficiently suppressed. Examples of such seed infectious diseases include stupid seedling disease, seedling blight, and seedling blast.
[0018]
【Example】
Hereinafter, the present invention will be described in more detail with reference to test examples and the like, but the present invention is not limited to these examples.
[0019]
First, manufacture of this liquid agent is shown in the following manufacture examples.
[0020]
Production Example 1
0.25 g of powdered wasabi is weighed into a container, and water is added to make a total of 100 ml. Thereafter, the mixture is sufficiently stirred and mixed to obtain 0.25% by weight of this solution.
[0021]
Production Example 2
0.25 g of powdered mustard is weighed into a container, and water is added to make a total of 100 ml. Thereafter, the mixture is sufficiently stirred and mixed to obtain 0.25% by weight of this solution.
[0022]
Production Example 3
0.25 g of pasty wasabi is weighed into a container, and water is added to make a total of 100 ml. Thereafter, the mixture is sufficiently stirred and mixed to obtain 0.25% by weight of this solution.
[0023]
Production Example 4
0.25 g of pastry mustard is weighed into a container, and water is added to make a total of 100 ml. Thereafter, the mixture is sufficiently stirred and mixed to obtain 0.25% by weight of this solution.
[0024]
Production Example 5
100 g of root wasabi is ground down and then filtered through gauze to obtain the juice as ground down wasabi juice. After weighing 0.25 ml of the soup stock into a container, add water to make a total of 100 ml. Thereafter, the mixture is sufficiently stirred and mixed to obtain 0.25% by weight of this solution.
[0025]
Production Example 6
After weighing 2 g of powdered mustard into a container, 8 g of talc is added and mixed well to obtain 20% by weight of this powder.
[0026]
Next, the test example about disease control using this liquid agent is shown.
[0027]
Test example 1
7 g of naturally infected seeds of rice contaminated with fungal seedlings were immersed in a commercially available powdered wasabi or powdered water suspension suspended at a predetermined concentration for 24 hours at 15 ° C. It was immersed for 3 days in water equivalent to twice the amount of (g) (water temperature 15 ° C.). Thereafter, the immersed rice seeds were allowed to stand at 30 ° C. for 24 hours for germination. Rice seeds thus sprouting are sown in a seedling box, then left to stand at 30 ° C. for 3 days, and then germinated in a glass greenhouse at about 20 to 30 ° C. for 36 days to grow into seedlings. It was. At the time of the survey, the grown rice seedlings were observed, the number of diseased seedlings and the number of diseaseless seedlings were counted, the diseased seedling rate was calculated by the following formula, and the control value was calculated.
[0028]
(Calculation formula 1) Diseased seedling rate (%) = [(number of diseased seedlings) / {(number of diseased seedlings) + (number of diseaseless seedlings)}] × 100
[0029]
(Calculation Formula 2) Control Value (%) = 100 × [1-{(Disease Seedling Rate in Treatment Zone) / (Disease Seedling Rate in Non-Treatment Zone)}]
[0030]
The results are shown in Table 1. As is apparent from Table 1, it was confirmed that the method of the present invention has a high control effect against ridiculous seedling diseases.
[0031]
[Table 1]
【The invention's effect】
By the method of the present invention, seed infectious diseases that occur during the rice seedling raising stage can be sufficiently suppressed.
Claims (11)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003208989A JP4404580B2 (en) | 2003-08-27 | 2003-08-27 | Rice seed disinfection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003208989A JP4404580B2 (en) | 2003-08-27 | 2003-08-27 | Rice seed disinfection method |
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| Publication Number | Publication Date |
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| JP2005068024A true JP2005068024A (en) | 2005-03-17 |
| JP4404580B2 JP4404580B2 (en) | 2010-01-27 |
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| CN115997519A (en) * | 2023-03-06 | 2023-04-25 | 浙江大禾种业有限公司 | Seed soaking and germination accelerating method for rice seeds |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115997519A (en) * | 2023-03-06 | 2023-04-25 | 浙江大禾种业有限公司 | Seed soaking and germination accelerating method for rice seeds |
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