JP4480866B2

JP4480866B2 - Particulate wettable powder for seed disinfection and its production method, chemical solution for seed disinfection and its production method

Info

Publication number: JP4480866B2
Application number: JP2000265080A
Authority: JP
Inventors: 佳彦鍋谷; 正樹秋山; 伸二米村
Original assignee: Hokko Chemical Industry Co Ltd
Current assignee: Hokko Chemical Industry Co Ltd
Priority date: 2000-09-01
Filing date: 2000-09-01
Publication date: 2010-06-16
Anticipated expiration: 2020-09-01
Also published as: JP2002080306A

Description

【０００１】
【発明の属する技術分野】
本発明は、種子消毒用の粒状水和剤及びその製法並びに種子消毒用薬液及びその製法に関する。特に、粒状水和剤を水で希釈して、高濃度希釈液を調製する時粉立ちも少なく、水によく分散する種子消毒用粒状水和剤に関する。
【０００２】
【従来の技術】
種子消毒は、農薬活性成分、界面活性剤を有機溶剤にとかした乳剤や、農薬活性成分、界面活性剤、クレーなどの増量剤からなる水和剤を調製し、これを水で２０〜２００倍に希釈した希釈液として、これに種籾を浸漬する方法が一般的に行われている。
【０００３】
一方、最近では大量の種子を省力的に消毒する方法として、水和剤を３〜２０倍に希釈した希釈液、いわゆる高濃度希釈液を乾燥種籾重量の３％相当量を種子消毒用吹き付け装置を用いて種子に吹き付ける方法が普及してきている。この消毒方法に使用する水和剤に関する研究として、例えば、種子病害防除用活性成分としてペンタ−４−エニル＝Ｎ−フルフリル−Ｎ−イミダゾール−１−イルカルボニル−ＤＬ−ホモアラニナートを含む種子吹き付け用水和剤であり、低倍量の水で高濃度希釈液を作る時に生ずる沈殿物が弱い撹拌力で容易に水に再分散させることのできる水和剤に関する特開平７−２３３０１５号公報記載の技術が知られている。また、種子消毒用農薬活性成分を含む種子消毒用水和剤であって、この水和剤を水で希釈して特に高濃度希釈液とした時、いったん沈殿した固体沈殿物を簡単な撹拌又は浸透で水によく再分散できる種子消毒用水和剤に関する特開平７−２５２１０３号公報記載の技術が知られている。
【０００４】
また、この吹き付け装置を用いた種子消毒のための高濃度薬液を調製するには、水和剤が微粉状であるため粉立ちが著しく、作業者の薬剤による被爆などの安全性が問題となっており、これらの問題のない、種子消毒剤として、粒状水和剤の開発が進められている。
一方、本発明で用いるのと同様な「粒状水和剤」は、剤型としては既に、地上散布用としては公知である。
【０００５】
【発明が解決しようとする課題】
このような状況の中で本発明は、粉立ちがなく、少量の水中でも均一に分散し、高濃度希釈液を容易に調製しうる種子消毒用粒状水和剤及びその製法並びに種子消毒用薬液及びその製法を提供することにある。
【０００６】
【課題を解決するための手段】
本発明者らは、これらの課題を解決すべく鋭意、検討した。その結果、従来種子消毒剤として使用してきた水和剤を粒状に製剤化して、かつ水和性と見掛け比重を特定の範囲とすることで前記した課題を解決することを見い出した。
【０００７】
より詳しくは、粒状水和剤の組成が農薬活性成分（ペンタ−４−エニル＝Ｎ−フルフリル−Ｎ−イミダゾール−１−イルカルボニル−ＤＬ−ホモアラニナート（以下ペフラゾエートという）を除く。）、界面活性剤、及び増量剤とからなり、この粒状水和剤の水和性を３分以内、より好ましくは２分以内とし、かつ製剤の見掛け比重を０．４以上となるように製剤化した種子消毒用粒状水和剤が前記の課題を解決するうえで極めて有用であるとの知見を得た。
【０００８】
そして、この種子消毒用の粒状水和剤は、水で３〜２０倍に希釈して、種子消毒薬液とし、種子消毒用の吹き付け装置を用いて常法により種子に吹き付ければよい。このとき、種子消毒薬液の調製時の粒状水和剤の容量は、水和剤の場合に比べ非常に小さく、容易に水になじみ、分散され、扱い易いと同時に粉立ちもない。
【０００９】
【発明の実施の形態】
以下に、本発明に係る種子消毒用粒状水和剤及びその製法並びに種子消毒用薬液及びその製法について、その実施の形態をさらに詳細に説明する。本発明に係る種子消毒用粒状水和剤の農薬活性成分は、稲馬鹿苗病、稲ごま葉枯病などの種子病害や種子消毒による害虫防除に用いられる農薬活性成分（ペフラゾエートを除く）であればよく、これらの１種又は２種以上を併用しても何ら問題ない。これらの農薬活性成分としては、例えば次のようなものが挙げられる。
種子消毒用殺菌成分
ベノミル、チアベンダゾール、チオファネートメチル、チウラム、プロクロラズ、トリフミゾール、イプコナゾール、塩基性塩化銅、フルジオキソニル、水酸化第二銅を挙げることができる。
これらの農薬活性成分の製剤中への添加量は特に制限されないが、一般的には製剤全量の１〜９０重量％、好ましくは５〜７０重量％である。
【００１０】
なお、これらの農薬活性成分名は「農薬ハンドブック」１９９８年版（１９９８年１２月１５日、社団法人日本植物防疫協会発行）に記載の化合物である。
また、本発明に使用する界面活性剤としては、非イオン性界面活性剤、陰イオン性界面活性剤、陽イオン性界面活性剤、両性界面活性剤があり、具体的には次のものを使用することができる。
【００１１】
非イオン性界面活性剤
ポリオキシエチレンアルキルエーテル、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スチリルフェニルエーテル、ポリオキシエチレンアルキルエステル、ポリオキシエチレンソルビタンアルキレート、ポリオキシエチレンフェニルエーテルポリマー、ポリオキシエチレンアルキレンアリールフェニルエーテル、ポリオキシエチレンアルキレングリコール、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などを挙げることができる。
【００１２】
陰イオン性界面活性剤
リグニンスルホン酸塩、アルキルアリールスルホン酸塩、ジアルキルスルホサクシネート、ポリオキシエチレンアルキルアリールエーテルサルフェート、アルキルナフタレンスルホン酸塩、ポリオキシエチレンスチリルフェニルエーテルサルフェートなどを挙げることができる。
【００１３】
陽イオン性界面活性剤
アルキルアミン塩などを挙げることができる。
両性界面活性剤
第４級アンモニウム塩アルキルベタイン、アミンオキサイドなどを挙げることができる。
【００１４】
なお、本発明で使用できる界面活性剤は、これらに限定されるものではなく、これらの１種又は２種以上を併用しても何ら問題ない。また、これらの界面活性剤の添加量は特に限定されないが、水和性を３分以内とするために、製剤中に０．１重量％以上添加することが望ましく、また３０重量％以上添加しても水和性の改善効果は認められないので、製剤中に０．１〜３０重量％が望ましい。
【００１５】
本発明に使用できる増量剤は、無機担体又は有機担体のいずれでもよく例えば、次のようなものが挙げられる。
無機担体
クレー、ベントナイト、タルク、炭酸カルシウム、炭酸ナトリウム、ジークライト、セリサイト、酸性白土、珪石、ケイソウ土、軽石、ゼオライト、バーミキュライト、塩化カリウム、尿素、ホワイトカーボン、硫酸アンモニウム、硫酸ナトリウム、パーライト、硫酸マグネシウムを挙げることができる。
有機担体
グルコース、マルトース、シュークロース、ラクトースを挙げることができる。これらの無機担体又は有機担体は１種又は２種以上を併用することができるが、本発明では、見掛け比重が０．４以上になるようにすることが重要である。また、無機担体と有機担体を併用してもよい。
【００１６】
また、補助剤として、粘結剤、防腐防かび剤、溶剤、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を各々必要に応じて添加してもよいが、ここに例示した補助剤に限定されるものではない。
本発明に使用できる粘結剤としては、特に限定されるものではないが、例えば、次のようなものを挙げることができる。
澱粉、デキストリン、セルロース、メチルセルロース、エチルセルロース、カルボキシメチルセルロース、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、カルボキシメチルデンプン、プルラン、アルギン酸ナトリウム、アルギン酸アンモニウム、アルギン酸プロピレングリコールエステル、グァーガム、ローカストビーンガム、アラビアゴム、キサンタンガム、ゼラチン、カゼイン、ポリビニルアルコール、ポリエチレンオキサイド、ポリエチレングルコール、エチレン・プロピレンブロックポリマー、ポリアクリル酸ナトリウム、ポリビニルピロリドンなどを挙げることができる。
【００１７】
これらの１種又は２種以上を併用することができる。また、これらの粘結剤の添加量は特に限定されないが、効果、経済性より製剤中に０．１〜４０重量％が望ましい。
【００１８】
また、本発明では、低融点の有効成分を液状化する目的あるいは効果増強などを目的として溶剤を使用することができる。
本発明に使用できる溶剤としては、アジピン酸イソブチル、アジピン酸ジオレイル、アジピン酸ジイソデシル、フタル酸ジエチルヘキシル、フタル酸ジデシル、トリメリット酸２−エチルヘキシル、トリメット酸トリイソデシルなどの多塩基酸アルコールエステル、２−エチルヘキサン酸セチル、ヤシ脂肪酸セチル、ラウリン酸メチル、ミリスチン酸メチル、オレイン酸メチル、オレイン酸オクチルなどの脂肪酸アルコールエステル、ソルビタンモノラウレート、ソルビタンモノオレエートなどの多価アルコール脂肪酸エステル、オクチルアルコール、ラウリルアルコールなどの高級アルコール、１，２−ジメチル−４−エチルベンゼン、メチルナフタレン、１−フェニル−１−キシリルエタン、１−キシリル−１，３−ジフェニルブタンなどの芳香族炭化水素、などがあり、これらの１種又は２種以上を併用することができる。これらの使用量は特に限定されないが１〜２０重量％が好ましい。
【００１９】
また、本発明の粒状水和剤は、単に粒状水和剤としただけでは所期の目的を達成することはできない。すなわちまず、水和性「農薬科学用語辞典」社団法人日本植物防疫協会平成６年６月１５日発行第１４０頁）を３分以内となるように、調整することが必要である。そして、製剤の見掛け比重を０．４以上とする必要がある。
なお、製剤の見掛け比重は０．４以上であれば特に問題はないが、有効成分、界面活性剤、固体担体、その他の補助剤の個々の見掛け比重の点から、製剤の見掛け比重は一般的に０．４〜２．０となる。この粒状水和剤の見掛け比重が０．４よりも小さくなると水での希釈時に薬剤の容量が大きくなり水への水和性、そして分散に時間がかかり、作業性に劣る。
また、水和性が３分を超えても水への分散に時間がかかり、作業性が悪くなる。
これらの水和性、分散性は界面活性剤の種類、添加量を適宜選択することにより調整でき、また固体担体、その他補助剤の種類、添加量を適宜選択することが見掛け比重を０．４以上に調整することができる。
なお、水和性、及び見掛け比重は後述する試験例について説明した方法により測定した。
【００２０】
種子消毒用粒状水和剤の調製法
本発明に係る種子消毒用粒状水和剤の調製法は特に限定されないが次の方法によって調製することができる。
例えば、前記したごとく農薬活性成分、界面活性剤、増量剤を混合し、さらに必要があれば粘結剤、防腐防かび剤、農薬活性成分安定化剤などと混合して、加水混練後、押し出し造粒機にて造粒し、乾燥、整粒すればよい。また、加水しながら転動造粒機にて造粒し乾燥、整粒してもよい。さらに水を添加する前の粉体混合物を水に分散させ噴霧造粒機により造粒してもよく、また、粉体混合物を流動させながら粘結剤溶液あるいは農薬活性成分などをスプレーして造粒する流動層造粒機により、造粒してもよい。
また、本発明の種子消毒用粒状水和剤を得るには、界面活性剤の使用により、分散性機能を付与して、水和性を３分以内、好ましくは２分以内になるように調整し、比重の異なる増量剤などを使用して粒状水和剤の見掛け比重を０．４以上になるように調整すればよい。
【００２１】
【実施例】
次に、実施例で本発明をさら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。以下に部とあるのはすべて重量部を意味する。
【００２２】
実施例１
ベノミル２０部、リグニンスルホン酸ナトリウム１０部、乳糖１５部、クレー５５部をハンマーミル（不二パウダル株式会社製）で混合した。その後、この混合物１００部に対し水１０部を添加し、双腕ニーダー（不二パウダル株式会社製）で混練混合した。次いで０．８ｍｍ径のスクリーンを付けた押し出し造粒機で造粒し、さらに流動層乾燥機（不二パウダル株式会社製）にて乾燥篩別し、粒径０．３５５ｍｍ〜１．１８ｍｍの粒状水和剤を得た。得られた粒状水和剤の水和性は５４秒、見掛け比重は０．５８、粉立ち性は１秒であった。
【００２３】
実施例２
ベノミル２０部、チウラム２０部、β−ナフタレンスルホン酸ホルマリン縮合物のナトリウム塩５部、ポリオキシエチレンスチリルフェニルエーテル２部、プルラン１部、クレー５２部をハンマーミルで混合した。その後、この混合物１００部に対し水１２部を添加し双腕ニーダーで混練混合する。次いで０．８ｍｍ径のスクリーンを付けた造粒機で造粒し、さらに流動層乾燥機にて乾燥篩別し粒径０．３５５〜１．１８ｍｍの粒状水和剤を得た。得られた粒状水和剤の水和性は１１０秒、見掛け比重は０．４０、粉立ち性は２秒であった。
【００２４】
実施例３
ベノミル２０部、ホワイトカーボン３部、ポリオキシエチレンスチリルフェニルエーテル５部、ドデシルベンゼンスルホン酸ナトリウム１０部、ベントナイト１部、ケイ石６１部をハンマーミルで混合した。
その後、この混合物１００部に対し水１２部を添加し双腕ニーダーで混練混合した。次いで０．８ｍｍ径のスクリーンを付けた押し出し造粒機で造粒し、さらに流動層乾燥機にて乾燥篩別し、粒径０．３５５〜１．１８ｍｍの粒状水和剤を得た。
得られた粒状水和剤の水和性は４７秒、見掛け比重は０．６３、粉立ち性は２秒であった。
【００２５】
実施例４
実施例２のクレー５２部をケイ石５２部にかえた以外は実施例２と同様の粒径０．３５５〜１．８ｍｍの粒状水和剤を得た。
得られた粒状水和剤の水和性は１５秒、見掛け比重は０．７１、粉立ち性は１秒であった。
【００２６】
実施例５
実施例１のベノミル２０部をチウラム２０部に乳糖１５部をショ糖１０部にかえ、ドデシルベンゼンスルホン酸ナトリウム５部を加えた以外は実施例１と同様の粒径０．３５５〜１．１８ｍｍの粒状水和剤を得た。得られた粒状水和剤の水和性は３０秒、見掛け比重は０．５５、粉立ち性は１秒であった。
【００２７】
比較例１
ベノミル２０部、リグニンスルホン酸ナトリウム１０部、乳糖１５部、クレー５５部をハンマーミルで混合し水和剤を得た。
得られた水和剤の水和性は２０３秒、見掛け比重は０．２８、粉立ち性は２０秒であった。
【００２８】
比較例２
ベノミル２０部、チウラム２０部、ポリオキシエチレンソルビタン脂肪酸エステル２部、β−ナフタレンスルホン酸ホルマリン縮合物のナトリウム塩５部、クレー５３部をハンマーミルで混合して水和剤を得た。得られた水和剤の水和性は２３５秒、見掛け比重は０．２１、粉立ち性は１６秒であった。
【００２９】
比較例３
ベノミル２０部、ホワイトカーボン３部、ポリオキシエチレンアリールフェニルエーテルホスフェート５部、クレー７２部をハンマーミルで混合し水和剤を得た。得られた水和剤の水和性は２２５秒、見掛け比重は０．２５、粉立ち性は１９秒であった。
【００３０】
比較例４
実施例２のクレー５２部をゼオライト５２部におきかえて、ハンマーミルで混合し、あとは実施例２と同様に粒径０．３５５〜１．１８ｍｍの粒状水和剤を得た。得られた粒状水和剤の水和性は１４０秒見掛け比重は０．２７、粉立ち性は８秒であった。
【００３１】
比較例５
実施例３のポリオキシエチレンスチリルフェニルエーテル５部を１部に、ドデシルベンゼンスルホン酸ナトリウム１０部を１部に、ケイ石６１部を７４部におきかえて、ハンマーミルで混合し、あとは実施例３と同様に粒径０．３５５〜１．１８ｍｍの粒状水和剤を得た。得られた粒状水和剤の水和性は１９０秒、見掛け比重は０．６、粉立ち性は３秒であった。
【００３２】
比較例６
実施例２のβ−ナフタレンスルホン酸ホルマリン縮合物のナトリウム塩５部をリグニンスルホン酸ナトリウム１０部に、クレー５２部をゼオライト４７部におきかえて、ハンマーミルで混合し、あとは実施例２と同様に粒径０．３５５〜１．１８ｍｍの粒状水和剤を得た。得られた粒状水和剤の水和性は６８秒、見掛け比重は０．３２、粉立ち性は３秒であった。
【００３３】
ここで、上記水和性、見掛け比重、粉立ち性の試験方法について、以下の試験例１〜３の記載によって説明する。また、これらに加えて、試験例４及び試験例５によって、さらに本発明の有用性を明らかにする。
【００３４】
試験例１（水和性）
この試験では、５００ｍｌビーカーに２０℃の水（以下の＊１に説明）２００ｍｌを入れ、これに試料５ｇを水面上約１０ｃｍの位置よりうすくひろがるように静かに落とす。試料を落とし終わってから水面に没するまでの時間（秒）を測定する。
この試験結果は、前述したが、表１にもまとめて示す。
なお、本方法は公定検査法と同じ方法である。
＊１水：硬度３度のものを使用する。
硬度３度水の調整法
炭酸カルシウム０．３０７７ｇ、酸化マグネシウム０．０９２ｇを少量の希塩酸に溶かした後、砂浴上で蒸発乾固して塩酸を除去し、水で１０リットルに希釈する。
【００３５】
試験例２（見掛け比重）
この試験では、試料２０ｇを底面が平で座りのよい１００ｍｌ容量ガラス製メスシリンダー（重量が１２７±５ｇ、５〜１００ｍｌまで１ｍｌごとに目盛が刻まれていて０〜１００ｍｌ標線までの距離が１５．５〜１６．５ｍｍであること）に流し込み、親指と人さし指でシリンダー上部をはさみ、１秒間で指定の高さ（下から２５±２ｍｍ）まで持ち上げ、次の１秒の初めに親指と人さし指をすばやくはなし、シリンダーを厚さ２ｃｍの木板（杉板）の上に落下させる。このようにしてシリンダーを２秒に１回の割合で５０回落下させる。シリンダーを持ち上げ指を放す直前に角度にして約１０°シリンダーを回す。こうすることにより、試料層が平に収まり体積が読み取り易くなる。５０回落下させた後、直ちにシリンダーを目の高さに持ち上げ体積をｍｌ単位で読み取る（Ｖｍｌ）。
見掛け比重（Ｄ）は、次式を用いて計算する。その結果は、前述したとおりであるが、表１にもまとめて示す。
Ｄ＝２０／Ｖ
【００３６】
試験例３（粉立ち性）
この試験では、試料２００ｇを１リットル容量の大きさのマヨネーズ瓶中に入れ、ふたをして激しく上下に２０回振とうし静置する。その後、浮遊性粒子がほとんど沈降するのを内眼で確かめ、それまでの時間を測定する。
この試験結果は、前述したとおりであるが、表１にもまとめて示す。
試験結果から了解されるように、実施例１〜５の粉立ち性は極端に小さくなっている。
【００３７】
試験例４（崩壊性試験）
この試験では、１００ｍｌ容量の有栓シリンダーに２０℃の３度の硬水９５ｍｌを入れ、粒状水和剤５ｇを投入し、１分後にシリンダーを転倒し、すべての粒が崩壊するまでの転倒回数を計測した。
その結果は、表１のとおりである。
結果から了解されるように、実施例１〜５の崩壊性は、比較例４〜６に比べて良好であり、すばやく所定の濃度に調整できる。
【００３８】
【表１】

【００３９】
試験例５（イネ馬鹿苗病防除効果試験）
イネ馬鹿苗病自然感染罹病籾（品種「日本晴」）の乾燥種籾１５０ｇに対し実施例に準じて調製した粒状水和剤を水で所定の濃度になるように希釈した薬液あるいは市販薬剤を水で希釈した薬液のそれぞれ４．５ｍｌ（種籾重量の３％相当量）を種籾に均一に付着するようにエアースプレーガン（Ｆ８８型明治機械製作所製）を用いて吹き付け処理した。
【００４０】
処理した種籾を１５℃で６日間浸種し、さらに３０℃で１晩催芽した。この種籾１５０ｇ中の１８ｇ量を、通常の育苗箱（縦×横×高さ＝６０ｃｍ×３０ｃｍ×３ｃｍ）の１／１０の大きさの育苗箱（縦×横×高さ＝１２ｃｍ×１５ｃｍ×３ｃｍ）に播種し直ちに覆土した。覆土後は３２℃で２日間出芽処理し、出芽後２日間は温室内の寒冷紗で遮光し、その後は寒冷紗を除去し通常の栽培管理をした。
【００４１】
なお、育苗培土には市販のクミアイ粒状培土Ｄ（呉羽化学工業株式会社製）を使用した。
播種３０日後に育苗箱の全苗について徒長、枯死などのイネ馬鹿苗病状を示した発病苗数と無病徴の苗数について調査し下記式によって発病苗率（％）を求め防除価（％）を求めた。また薬害については出芽程度、生育程度などについて観察し、下記の薬害程度で示した。
発病苗率（％）＝（発病苗数）／（総調査苗数）×１００
防除価（％）＝｛１−（処理区の発病苗率）／（無処理区の発病苗率）｝ ×１００
【００４２】
薬害程度
−：無 ±：微＋：小＋＋：中＋＋＋：大
この結果を表２に示す。
この結果から了解されるように、本発明によれば、優れた種子消毒活性を期待することができる。
【００４３】
【表２】

【００４４】
【発明の効果】
本発明を実施すると、次のような効果がもたらされる。すなわち、第１に本発明は水和性と見掛け比重を特定の範囲に制限することにより、粉立ちを極端に小さくすることができる。したがって、種子消毒用の薬液を調製する作業がやり易くかつ人にかかることもなく安全に行うことができる利点がある。
第２に水和性を３分以内とすることにより、種子消毒用の高濃度希釈液を、たとえ大量に調整する必要があっても、例えば３〜２０倍の希釈倍率のいずれの濃度に調整する場合でもすばやく調整することができる。
第３に、使用できる種子消毒用の農薬活性成分は特定の種類のものに限定されることはなく、かつ実際に使用しても、本来有する種子消毒活性をいかんなく発揮するものである。
これらのことから、本発明に係る種子消毒用粒状水和剤は、新しい種子消毒用の製剤として有用である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a granular wettable powder for seed disinfection and a production method thereof, and a chemical solution for seed disinfection and a production method thereof. In particular, the present invention relates to a granular wettable powder for seed disinfection that is less powdered and is well dispersed in water when a granular wettable powder is diluted with water to prepare a highly concentrated diluted solution.
[0002]
[Prior art]
For seed disinfection, we prepared emulsions in which agrochemical active ingredients and surfactants were dissolved in organic solvents, and wettable powders consisting of extenders such as agrochemical active ingredients, surfactants, and clays, which were 20 to 200 times in water. As a diluted solution, a method of immersing seed pods in this is generally performed.
[0003]
On the other hand, as a method for disinfecting a large amount of seeds recently, as a method for spraying seed disinfection, a diluted solution obtained by diluting a wettable powder 3 to 20 times, that is, a so-called high-concentration diluted solution, is equivalent to 3% of the dry seed weight The method of spraying seeds using cereals has become widespread. As a study on wettable powders used in this disinfection method, for example, hydration for seed spraying containing penta-4-enyl = N-furfuryl-N-imidazol-1-ylcarbonyl-DL-homoalaninate as an active ingredient for controlling seed diseases Japanese Patent Application Laid-Open No. 7-233015 relates to a wettable powder which is a hydrating agent and can be easily redispersed in water with a weak stirring force. Are known. It is also a seed disinfecting wettable powder containing an agrochemical active ingredient for seed disinfecting, and when this wettable powder is diluted with water to make a particularly high-concentration diluted solution, the solid precipitate once precipitated is simply stirred or permeated. A technique described in Japanese Patent Laid-Open No. 7-252103 relating to a seed disinfecting wettable powder that can be well redispersed in water is known.
[0004]
In addition, when preparing a high-concentration chemical solution for seed disinfection using this spraying device, the wettable powder is in the form of fine powder, so powdering is significant, and safety such as exposure to the worker's chemicals becomes a problem. As a seed disinfectant free from these problems, the development of granular wettable powder is underway.
On the other hand, “particulate wettable powder” similar to that used in the present invention is already known as a dosage form for ground spraying.
[0005]
[Problems to be solved by the invention]
Under such circumstances, the present invention provides a granular dispersible powder for seed disinfection that is free from powdering, is uniformly dispersed in a small amount of water, and can easily prepare a high-concentration diluted solution, a method for producing the same, and a chemical solution for seed disinfection. And providing a manufacturing method thereof.
[0006]
[Means for Solving the Problems]
The present inventors diligently studied to solve these problems. As a result, it has been found that a wettable powder that has been used as a seed disinfectant in the past is formulated into a granular form, and the above-mentioned problems are solved by making the hydration property and apparent specific gravity within a specific range.
[0007]
More specifically, the composition of the granular wettable powder is an agrochemical active ingredient (excluding penta-4-enyl = N-furfuryl-N-imidazol-1-ylcarbonyl-DL-homoalaninate (hereinafter referred to as pefazoate)), a surfactant. And a bulking agent, and the hydrating property of the granular wettable powder is within 3 minutes, more preferably within 2 minutes, and the formulation is formulated so that the apparent specific gravity of the preparation is 0.4 or more. The present inventors have found that granular wettable powder is extremely useful in solving the above-mentioned problems.
[0008]
Then, the granular wettable powder for seed disinfection may be diluted with water 3 to 20 times to obtain a seed disinfectant solution and sprayed on the seeds by a conventional method using a seed disinfecting spray device. At this time, the volume of the granular wettable powder at the time of preparation of the seed disinfectant solution is very small compared to the case of the wettable powder, and it is easy to handle and disperse in water, and is easy to handle and does not powder.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
In the following, the embodiment of the granular dispersal powder for seed disinfection and the production method thereof, and the chemical solution for seed disinfection and the production method thereof according to the present invention will be described in more detail. The agrochemical active ingredient of the granular dispersible powder for seed disinfection according to the present invention may be an agrochemical active ingredient (excluding pefazoate) used for pest control by seed disinfection or seed disinfection, such as rice stag seedling disease and rice sesame leaf blight. What is necessary is just to use these 1 type (s) or 2 or more types together, and there is no problem. Examples of these agrochemical active ingredients include the following.
Examples of the disinfecting components for seed disinfection include benomyl, thiabendazole, thiophanate methyl, thiuram, prochloraz, trifumisol, ipconazole, basic copper chloride, fludioxonil, and cupric hydroxide .
The amount of these agrochemical active ingredients added to the preparation is not particularly limited, but is generally 1 to 90% by weight, preferably 5 to 70% by weight, based on the total amount of the preparation.
[0010]
The names of these agrochemical active ingredients are the compounds described in “Agricultural Chemicals Handbook” 1998 edition (December 15, 1998, published by the Japan Plant Protection Association).
The surfactants used in the present invention include nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants. Specifically, the following are used: can do.
[0011]
Nonionic surfactants Polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether, polyoxyethylene styryl phenyl ether, polyoxyethylene alkyl ester, polyoxyethylene sorbitan alkylate, polyoxyethylene phenyl ether polymer, Examples include polyoxyethylene alkylene aryl phenyl ether, polyoxyethylene alkylene glycol, and polyoxyethylene / polyoxypropylene block polymer.
[0012]
Anionic surfactants include lignin sulfonate, alkyl aryl sulfonate, dialkyl sulfo succinate, polyoxyethylene alkyl aryl ether sulfate, alkyl naphthalene sulfonate, polyoxyethylene styryl phenyl ether sulfate, etc. be able to.
[0013]
Cationic surfactants Alkylamine salts and the like can be mentioned.
Amphoteric surfactants Quaternary ammonium salt alkylbetaines, amine oxides and the like can be mentioned.
[0014]
The surfactant that can be used in the present invention is not limited to these, and there is no problem even if one or more of these are used in combination. The amount of these surfactants to be added is not particularly limited, but it is desirable to add 0.1% by weight or more, and 30% by weight or more in the preparation to make the hydration property within 3 minutes. However, since the improvement effect of hydration is not recognized, 0.1 to 30 weight% is desirable in a formulation.
[0015]
The bulking agent that can be used in the present invention may be either an inorganic carrier or an organic carrier, and examples thereof include the following.
Inorganic carrier clay, bentonite, talc, calcium carbonate, sodium carbonate, dikelite, sericite, acid clay, silica, diatomaceous earth, pumice, zeolite, vermiculite, potassium chloride, urea, white carbon, ammonium sulfate, sodium sulfate, perlite, sulfuric acid Mention may be made of magnesium .
Examples include organic carriers glucose, maltose, sucrose, and lactose . These inorganic carriers or organic carriers can be used alone or in combination of two or more. In the present invention, it is important that the apparent specific gravity is 0.4 or more. Further, an inorganic carrier and an organic carrier may be used in combination.
[0016]
In addition, as an auxiliary agent, a binder, an antiseptic and fungicide, a solvent, a stabilizer for an agrochemical active ingredient, an antioxidant, an ultraviolet ray inhibitor, a crystal precipitation inhibitor, etc. may be added as necessary. However, it is not limited to the adjuvants exemplified here.
Although it does not specifically limit as a binder which can be used for this invention, For example, the following can be mentioned.
Starch, dextrin, cellulose, methylcellulose, ethylcellulose, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, carboxymethyl starch, pullulan, sodium alginate, ammonium alginate, propylene glycol ester alginate, guar gum, locust bean gum, gum arabic, xanthan gum, gelatin, Examples include casein, polyvinyl alcohol, polyethylene oxide, polyethylene glycol, ethylene / propylene block polymer, sodium polyacrylate, polyvinyl pyrrolidone, and the like.
[0017]
These 1 type (s) or 2 or more types can be used together. Moreover, the addition amount of these binders is not particularly limited, but is preferably 0.1 to 40% by weight in the preparation from the viewpoint of effects and economy.
[0018]
In the present invention, a solvent can be used for the purpose of liquefying an effective component having a low melting point or enhancing the effect.
Solvents that can be used in the present invention include polybutyl alcohol esters such as isobutyl adipate, dioleyl adipate, diisodecyl adipate, diethylhexyl phthalate, didecyl phthalate, 2-ethylhexyl trimellitic acid, triisodecyl trimetate, 2- Fatty acid alcohol esters such as cetyl ethylhexanoate, coconut fatty acid cetyl, methyl laurate, methyl myristate, methyl oleate, octyl oleate, polyhydric alcohol fatty acid esters such as sorbitan monolaurate, sorbitan monooleate, octyl alcohol, Higher alcohols such as lauryl alcohol, 1,2-dimethyl-4-ethylbenzene, methylnaphthalene, 1-phenyl-1-xylylethane, 1-xylyl-1,3-diphenylbutane Aromatic hydrocarbons, include, may be used in combination one or more of these. Although the usage-amount of these is not specifically limited, 1 to 20 weight% is preferable.
[0019]
Moreover, the granular wettable powder of the present invention cannot achieve the intended purpose simply by using a granular wettable powder. That is, first, it is necessary to adjust the hydration “Pesticide Science Terminology Dictionary” Japan Plant Protection Association, issued June 15, 1994, page 140) to be within 3 minutes. And it is necessary to make the apparent specific gravity of a formulation 0.4 or more.
There is no particular problem if the apparent specific gravity of the preparation is 0.4 or more, but the apparent specific gravity of the preparation is general in terms of the individual specific gravity of the active ingredient, surfactant, solid carrier, and other adjuvants. 0.4 to 2.0. If the apparent specific gravity of the granular wettable powder is less than 0.4, the volume of the drug becomes large when diluted with water, and it takes time to hydrate and disperse in water, resulting in poor workability.
Moreover, even if hydration property exceeds 3 minutes, dispersion | distribution to water takes time and workability | operativity worsens.
These hydration properties and dispersibility can be adjusted by appropriately selecting the type and addition amount of the surfactant, and the apparent specific gravity is 0.4 by appropriately selecting the type and addition amount of the solid carrier and other auxiliary agents. It can adjust to the above.
The hydration property and the apparent specific gravity were measured by the methods described for the test examples described later.
[0020]
Preparation method of seed disinfectant granular wettable powder The method of preparing the seed disinfectant granular wettable powder according to the present invention is not particularly limited, and can be prepared by the following method.
For example, as described above, agrochemical active ingredients, surfactants, and bulking agents are mixed, and if necessary, mixed with a binder, antiseptic, fungicide, agrochemical active ingredient stabilizer, etc. It may be granulated with a granulator, dried and sized. Further, the mixture may be granulated with a tumbling granulator while adding water, dried and sized. Further, the powder mixture before adding water may be dispersed in water and granulated by a spray granulator, or it may be produced by spraying a binder solution or an agrochemical active ingredient while flowing the powder mixture. You may granulate with the fluidized-bed granulator which granulates.
Further, in order to obtain the granular wettable powder for seed disinfection of the present invention, by using a surfactant, a dispersibility function is imparted, and the hydration property is adjusted to be within 3 minutes, preferably within 2 minutes. Then, it is only necessary to adjust the apparent specific gravity of the granular wettable powder to 0.4 or more by using a bulking agent having a different specific gravity.
[0021]
【Example】
Next, the present invention will be described more specifically with reference to examples, but the present invention is not limited thereto. In the following, “parts” means all parts by weight.
[0022]
Example 1
20 parts of benomyl, 10 parts of sodium lignin sulfonate, 15 parts of lactose and 55 parts of clay were mixed with a hammer mill (manufactured by Fuji Powder Co., Ltd.). Thereafter, 10 parts of water was added to 100 parts of this mixture, and kneaded and mixed with a double-arm kneader (manufactured by Fuji Powder Co., Ltd.). Next, the mixture is granulated by an extrusion granulator equipped with a 0.8 mm diameter screen, and further sieved by a fluidized bed dryer (manufactured by Fuji Powder Co., Ltd.) to obtain particles having a particle size of 0.355 mm to 1.18 mm. A wettable powder was obtained. The obtained granular wettable powder had a hydration property of 54 seconds, an apparent specific gravity of 0.58, and a powderiness of 1 second.
[0023]
Example 2
20 parts of benomyl, 20 parts of thiuram, 5 parts of sodium salt of β-naphthalenesulfonic acid formalin condensate, 2 parts of polyoxyethylene styrylphenyl ether, 1 part of pullulan and 52 parts of clay were mixed in a hammer mill. Thereafter, 12 parts of water is added to 100 parts of this mixture and kneaded and mixed with a double arm kneader. Next, the mixture was granulated with a granulator equipped with a 0.8 mm diameter screen, and further sieved with a fluid bed dryer to obtain a granular wettable powder having a particle size of 0.355 to 1.18 mm. The obtained granular wettable powder had a hydration property of 110 seconds, an apparent specific gravity of 0.40, and a powderiness of 2 seconds.
[0024]
Example 3
20 parts of benomyl, 3 parts of white carbon, 5 parts of polyoxyethylene styryl phenyl ether, 10 parts of sodium dodecylbenzenesulfonate, 1 part of bentonite and 61 parts of silica were mixed with a hammer mill.
Thereafter, 12 parts of water was added to 100 parts of this mixture and kneaded and mixed with a double arm kneader. Next, the mixture was granulated with an extrusion granulator equipped with a 0.8 mm diameter screen, and further sieved with a fluidized bed dryer to obtain a granular wettable powder with a particle size of 0.355 to 1.18 mm.
The obtained granular wettable powder had a hydration property of 47 seconds, an apparent specific gravity of 0.63, and a powderiness of 2 seconds.
[0025]
Example 4
A granular wettable powder having a particle size of 0.355 to 1.8 mm was obtained in the same manner as in Example 2 except that 52 parts of the clay in Example 2 was replaced with 52 parts of silica.
The obtained granular wettable powder had a hydration property of 15 seconds, an apparent specific gravity of 0.71, and a powderiness of 1 second.
[0026]
Example 5
The particle size of 0.355 to 1.18 mm was the same as in Example 1 except that 20 parts of benomyl of Example 1 was replaced with 20 parts of thiuram, 15 parts of lactose with 10 parts of sucrose, and 5 parts of sodium dodecylbenzenesulfonate was added. A granular wettable powder was obtained. The obtained granular wettable powder had a hydration property of 30 seconds, an apparent specific gravity of 0.55, and a powderiness of 1 second.
[0027]
Comparative Example 1
20 parts of benomyl, 10 parts of sodium lignin sulfonate, 15 parts of lactose and 55 parts of clay were mixed with a hammer mill to obtain a wettable powder.
The obtained wettable powder had a hydration property of 203 seconds, an apparent specific gravity of 0.28, and a powderiness of 20 seconds.
[0028]
Comparative Example 2
20 parts of benomyl, 20 parts of thiuram, 2 parts of polyoxyethylene sorbitan fatty acid ester, 5 parts of sodium salt of β-naphthalenesulfonic acid formalin condensate and 53 parts of clay were mixed with a hammer mill to obtain a wettable powder. The obtained wettable powder had a hydration property of 235 seconds, an apparent specific gravity of 0.21, and a powderiness of 16 seconds.
[0029]
Comparative Example 3
20 parts of benomyl, 3 parts of white carbon, 5 parts of polyoxyethylene arylphenyl ether phosphate and 72 parts of clay were mixed with a hammer mill to obtain a wettable powder. The obtained wettable powder had a hydration property of 225 seconds, an apparent specific gravity of 0.25, and a powderiness of 19 seconds.
[0030]
Comparative Example 4
52 parts of the clay of Example 2 was replaced with 52 parts of zeolite and mixed with a hammer mill, and thereafter, a granular wettable powder having a particle size of 0.355 to 1.18 mm was obtained in the same manner as in Example 2. The resulting wettable powder had a wettability of 140 seconds, an apparent specific gravity of 0.27, and a powderiness of 8 seconds.
[0031]
Comparative Example 5
Replace 5 parts of polyoxyethylene styrylphenyl ether of Example 3 with 1 part, 10 parts of sodium dodecylbenzenesulfonate with 1 part, and 61 parts of silica with 74 parts, and mix with a hammer mill. In the same manner as in Example 3, a granular wettable powder having a particle size of 0.355 to 1.18 mm was obtained. The obtained granular wettable powder had a hydration property of 190 seconds, an apparent specific gravity of 0.6, and a powderiness of 3 seconds.
[0032]
Comparative Example 6
5 parts of the sodium salt of β-naphthalene sulfonic acid formalin condensate of Example 2 is replaced with 10 parts of sodium lignin sulfonate and 52 parts of clay is replaced with 47 parts of zeolite, followed by mixing with a hammer mill. A granular wettable powder having a particle size of 0.355 to 1.18 mm was obtained. The obtained granular wettable powder had a hydration property of 68 seconds, an apparent specific gravity of 0.32, and a powderiness of 3 seconds.
[0033]
Here, the test method of the said hydration property, apparent specific gravity, and powderiness is demonstrated by description of the following test examples 1-3. In addition to these, Test Example 4 and Test Example 5 further clarify the usefulness of the present invention.
[0034]
Test Example 1 (hydratability)
In this test, 200 ml of 20 ° C. water (described in * 1 below) is placed in a 500 ml beaker, and 5 g of the sample is gently dropped from the position of about 10 cm above the water surface. Measure the time (seconds) from dropping the sample to immersing it on the water surface.
Although this test result was mentioned above, it shows collectively also in Table 1.
This method is the same as the official inspection method.
* 1 Water: Use water with a hardness of 3 degrees.
Method of adjusting water with hardness of 3 degrees After dissolving 0.3077 g of calcium carbonate and 0.092 g of magnesium oxide in a small amount of dilute hydrochloric acid, the solution is evaporated to dryness on a sand bath to remove hydrochloric acid and diluted to 10 liters with water.
[0035]
Test example 2 (apparent specific gravity)
In this test, a sample 20 g is a flat 100 ml glass graduated cylinder with a flat bottom (weight is 127 ± 5 g, scale is engraved every 1 ml from 5 to 100 ml, and the distance from the 0 to 100 ml mark is 15 5 to 16.5 mm), hold the top of the cylinder with the thumb and forefinger, lift it to the specified height (25 ± 2 mm from the bottom) in 1 second, and then push the thumb and forefinger at the beginning of the next second Quickly, drop the cylinder onto a 2 cm thick wooden board (cedar board). In this way, the cylinder is dropped 50 times at a rate of once every 2 seconds. Turn the cylinder about 10 ° at an angle just before lifting the cylinder and releasing your finger. By doing so, the sample layer is flat and the volume is easy to read. After dropping 50 times, immediately lift the cylinder to eye level and read the volume in ml (Vml).
The apparent specific gravity (D) is calculated using the following formula. The results are as described above, but are also shown in Table 1.
D = 20 / V
[0036]
Test example 3 (powderability)
In this test, 200 g of a sample is placed in a 1-liter mayonnaise bottle, covered, shaken vigorously up and down 20 times, and left to stand. After that, it is confirmed with the internal eye that the airborne particles are almost settled, and the time until that time is measured.
The test results are as described above, but are also shown in Table 1.
As understood from the test results, the powderiness of Examples 1 to 5 is extremely small.
[0037]
Test Example 4 (Disintegration test)
In this test, 95 ml of 3 degree hard water at 20 ° C. was put into a 100 ml capacity plugged cylinder, 5 g of granular wettable powder was added, the cylinder was overturned after 1 minute, and the number of falls until all the grains collapsed was measured. Measured.
The results are shown in Table 1.
As understood from the results, the disintegration properties of Examples 1 to 5 are better than those of Comparative Examples 4 to 6, and can be quickly adjusted to a predetermined concentration.
[0038]
[Table 1]

[0039]
Test Example 5 (Rice ridicule control effect test)
A chemical solution obtained by diluting a granular wettable powder prepared in accordance with the example to 150 g of dry varieties of rice idiots with natural infection (variety “Nippon Hare”) with water to a predetermined concentration or a commercially available drug with water. Each diluted chemical solution (4.5 ml (equivalent to 3% of seed weight)) was sprayed using an air spray gun (F88 type, manufactured by Meiji Kikai Seisakusho Co., Ltd.) so as to uniformly adhere to the seed seeds.
[0040]
The treated seed pods were soaked at 15 ° C. for 6 days and further germinated at 30 ° C. overnight. A seedling box (vertical x horizontal x height = 12 cm x 15 cm x 3 cm) that is 1/10 the size of a normal nursery box (vertical x horizontal x height = 60 cm x 30 cm x 3 cm). ) And immediately covered with soil. After covering the soil, budding treatment was carried out at 32 ° C. for 2 days. After budding, the plant was shielded from light with cold chillers in the greenhouse, after which the chilled potatoes were removed and normal cultivation management was carried out.
[0041]
In addition, the commercially available Kumiai granular culture soil D (made by Kureha Chemical Industry Co., Ltd.) was used for the seedling culture soil.
After 30 days of sowing, all seedlings in the nursery box were investigated for the number of diseased seedlings and disease-free seedlings that showed rice ridiculous disease conditions such as chief, dead, etc., and the diseased seedling rate (%) was calculated by the following formula and the control value (%) Asked. Regarding phytotoxicity, the degree of emergence and growth were observed, and the following phytotoxicity was shown.
Disease seedling rate (%) = (number of diseased seedlings) / (total number of seedlings) × 100
Control value (%) = {1- (Disease seedling rate in treated area) / (Disease rate in untreated area)} × 100
[0042]
Degree of chemical damage-: None ±: Fine +: Small ++: Medium +++: Large This result is shown in Table 2.
As understood from this result, according to the present invention, excellent seed disinfection activity can be expected.
[0043]
[Table 2]

[0044]
【The invention's effect】
When the present invention is implemented, the following effects are brought about. That is, firstly, according to the present invention, powdering can be extremely reduced by limiting the hydration property and the apparent specific gravity to a specific range. Therefore, there is an advantage that the operation for preparing the chemical solution for seed disinfection is easy and can be performed safely without taking a person.
Secondly, by setting the hydration property within 3 minutes, even if it is necessary to adjust the high-concentration dilution for seed disinfection in large quantities, for example, it is adjusted to any concentration of 3 to 20 times the dilution factor. You can quickly adjust even if you want.
Thirdly, the pesticidal active ingredient for seed disinfection that can be used is not limited to a specific type, and even if it is actually used, the seed disinfecting activity inherently exhibited.
From these facts, the granular wettable powder for seed disinfection according to the present invention is useful as a new preparation for seed disinfection.

Claims

Disinfecting components for seed disinfection (excluding penta-4-enyl = N-furfuryl-N-imidazol-1-ylcarbonyl-DL-homoalaninate), polyoxyethylene styryl phenyl ether, sodium lignin sulfonate, β-naphthalene sulfonic acid A granular wettable powder comprising a sodium salt of a formalin condensate, at least one surfactant selected from the group consisting of sodium dodecylbenzenesulfonate, and a bulking agent comprising an inorganic carrier and / or an organic carrier, A granular wettable powder for seed disinfection comprising 0.1 to 30% by weight of a surfactant, wherein the wettable nature of the granular wettable powder is adjusted within 3 minutes and the apparent specific gravity is adjusted to 0.4 or more. ,
The hydration properties are:
Place 200 ml of water at 20 ° C. in a 500 ml beaker, and gently drop 5 g of the sample from the position of about 10 cm above the water surface, and measure the time (seconds) from when the sample is dropped until it is immersed in the water surface. Here, water having a hardness of 3 degrees is used as the above water, 0.3077 g of calcium carbonate and 0.092 g of magnesium oxide are dissolved in a small amount of dilute hydrochloric acid, and then evaporated to dryness on a sand bath to obtain hydrochloric acid. And the hardness is adjusted by diluting to 10 liters with water,
The apparent specific gravity is:
A sample 20 g of a 100 ml capacity glass graduated cylinder with a flat bottom surface (weight is 127 ± 5 g, scaled every 1 ml up to 5-100 ml, and the distance from 0 to 100 ml marked line is 15.5-16 5mm), hold the top of the cylinder with your thumb and forefinger, lift to the specified height (25 ± 2mm from the bottom) in 1 second, and quickly release your thumb and forefinger at the beginning of the next 1 second. The cylinder is dropped onto a wooden board (cedar board) with a thickness of 2 cm. In this way, the cylinder is dropped 50 times at a rate of once every 2 seconds, and the cylinder is lifted to an angle immediately before releasing the finger. Turn the cylinder about 10 ° and drop it 50 times, then immediately raise the cylinder to eye level and read the volume in ml (Vml), D = 20 / V Granular wettable powder for seed disinfection characterized by comprising as a D calculated Te.

Disinfecting components for seed disinfection (excluding penta-4-enyl = N-furfuryl-N-imidazol-1-ylcarbonyl-DL-homoalaninate), polyoxyethylene styryl phenyl ether, sodium lignin sulfonate, β-naphthalene sulfonic acid Granular water comprising at least one surfactant selected from the group consisting of sodium salt of formalin condensate, sodium dodecylbenzenesulfonate, a bulking agent comprising an inorganic carrier and / or an organic carrier, and optionally other auxiliary components A wettable powder for seed disinfection, wherein the wettable powder is 3 minutes or less and the apparent specific gravity is adjusted to 0.4 or more,
The hydration properties are:
Place 200 ml of water at 20 ° C. in a 500 ml beaker, and gently drop 5 g of the sample from the position of about 10 cm above the water surface, and measure the time (seconds) from when the sample is dropped until it is immersed in the water surface. Here, water having a hardness of 3 degrees is used as the above water, 0.3077 g of calcium carbonate and 0.092 g of magnesium oxide are dissolved in a small amount of dilute hydrochloric acid, and then evaporated to dryness on a sand bath to obtain hydrochloric acid. And the hardness is adjusted by diluting to 10 liters with water,
The apparent specific gravity is:
A sample 20 g of a 100 ml capacity glass graduated cylinder with a flat bottom surface (weight is 127 ± 5 g, scaled every 1 ml up to 5-100 ml, and the distance from 0 to 100 ml marked line is 15.5-16 5mm), hold the top of the cylinder with your thumb and forefinger, lift to the specified height (25 ± 2mm from the bottom) in 1 second, and quickly release your thumb and forefinger at the beginning of the next 1 second. The cylinder is dropped onto a wooden board (cedar board) with a thickness of 2 cm. In this way, the cylinder is dropped 50 times at a rate of once every 2 seconds, and the cylinder is lifted to an angle immediately before releasing the finger. Turn the cylinder about 10 ° and drop it 50 times, then immediately raise the cylinder to eye level and read the volume in ml (Vml), D = 20 / V Granular wettable powder for seed disinfection characterized by comprising as a D calculated Te.

3. The wettable powder for seed disinfection according to claim 1 or 2, wherein the hydration property is adjusted within 2 minutes.

A seed disinfectant chemical solution obtained by diluting the granular wettable powder for seed disinfection according to any one of claims 1 to 3 with water.

A high-concentration dilution type seed disinfectant for spraying seeds obtained by diluting the granular dispersible powder for seed disinfection according to any one of claims 1 to 3 with water 3 to 20 times.

Disinfecting components for seed disinfection (excluding penta-4-enyl = N-furfuryl-N-imidazol-1-ylcarbonyl-DL-homoalaninate), polyoxyethylene styryl phenyl ether, sodium lignin sulfonate, β-naphthalene sulfonic acid A granular wettable powder obtained by mixing a sodium salt of a formalin condensate, at least one surfactant selected from the group consisting of sodium dodecylbenzenesulfonate, and a filler consisting of an inorganic carrier and / or an organic carrier. A method for producing a granular wettable powder for seed disinfection using these compositions, wherein the wettable nature of the granular wettable powder is adjusted within 3 minutes and the apparent specific gravity is adjusted to 0.4 or more,
The hydration properties are:
Place 200 ml of water at 20 ° C. in a 500 ml beaker, and gently drop 5 g of the sample from the position of about 10 cm above the water surface, and measure the time (seconds) from when the sample is dropped until it is immersed in the water surface. Here, water having a hardness of 3 degrees is used as the above water, 0.3077 g of calcium carbonate and 0.092 g of magnesium oxide are dissolved in a small amount of dilute hydrochloric acid, and then evaporated to dryness on a sand bath to obtain hydrochloric acid. And the hardness is adjusted by diluting to 10 liters with water,
The apparent specific gravity is:
A sample 20 g of a 100 ml capacity glass graduated cylinder with a flat bottom surface (weight is 127 ± 5 g, scaled every 1 ml up to 5-100 ml, and the distance from 0 to 100 ml marked line is 15.5-16 5mm), hold the top of the cylinder with your thumb and forefinger, lift to the specified height (25 ± 2mm from the bottom) in 1 second, and quickly release your thumb and forefinger at the beginning of the next 1 second. The cylinder is dropped onto a wooden board (cedar board) with a thickness of 2 cm. In this way, the cylinder is dropped 50 times at a rate of once every 2 seconds, and the cylinder is lifted to an angle immediately before releasing the finger. Turn the cylinder about 10 ° and drop it 50 times, then immediately raise the cylinder to eye level and read the volume in ml (Vml), D = 20 / V Preparation of seed disinfection for particulate wettable agent characterized by comprising as a D calculated Te.

Disinfecting components for seed disinfection (excluding penta-4-enyl = N-furfuryl-N-imidazol-1-ylcarbonyl-DL-homoalaninate), polyoxyethylene styryl phenyl ether, sodium lignin sulfonate, β-naphthalene sulfonic acid Mixing a sodium salt of a formalin condensate, at least one surfactant selected from the group consisting of sodium dodecylbenzenesulfonate, a bulking agent composed of an inorganic carrier and / or an organic carrier, and other auxiliary components as necessary. A method for producing a granular wettable powder for seed disinfection using these compositions, wherein the wettable nature of the granular wettable powder is adjusted within 3 minutes and the apparent specific gravity is adjusted to 0.4 or more. There,
The hydration properties are:
Place 200 ml of water at 20 ° C. in a 500 ml beaker, and gently drop 5 g of the sample from the position of about 10 cm above the water surface, and measure the time (seconds) from when the sample is dropped until it is immersed in the water surface. Here, water having a hardness of 3 degrees is used as the above water, 0.3077 g of calcium carbonate and 0.092 g of magnesium oxide are dissolved in a small amount of dilute hydrochloric acid, and then evaporated to dryness on a sand bath to obtain hydrochloric acid. And the hardness is adjusted by diluting to 10 liters with water,
The apparent specific gravity is:
A sample 20 g of a 100 ml capacity glass graduated cylinder with a flat bottom surface (weight is 127 ± 5 g, scaled every 1 ml up to 5-100 ml, and the distance from 0 to 100 ml marked line is 15.5-16 5mm), hold the top of the cylinder with your thumb and forefinger, lift to the specified height (25 ± 2mm from the bottom) in 1 second, and quickly release your thumb and forefinger at the beginning of the next 1 second. The cylinder is dropped onto a wooden board (cedar board) with a thickness of 2 cm. In this way, the cylinder is dropped 50 times at a rate of once every 2 seconds, and the cylinder is lifted to an angle immediately before releasing the finger. Turn the cylinder about 10 ° and drop it 50 times, then immediately raise the cylinder to eye level and read the volume in ml (Vml), D = 20 / V Preparation of seed disinfection for particulate wettable agent characterized by comprising as a D calculated Te.

The method for producing a granular wettable powder for seed disinfection according to claim 6 or 7 , wherein the hydration property is adjusted within 2 minutes.

The manufacturing method of the chemical | medical solution for seed disinfection which dilutes the granular wettable powder for seed disinfection in any one of Claims 1-3 to the use density | concentration with water.

A method for producing a high-concentration dilution type seed disinfecting chemical for spraying, wherein the granular dispersible powder for disinfecting seeds according to claim 1 is made 3 to 20 times with water.