JP4848147B2 - 農園芸用殺菌剤組成物及び植物病害の防除方法 - Google Patents
農園芸用殺菌剤組成物及び植物病害の防除方法 Download PDFInfo
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Description
・4−クロロ−2−シアノ−1−ジメチルスルファモイル−5−(4−メチルフェニル)イミダゾール(化合物No.1)
・4−クロロ−2−シアノ−1−ジメチルスルファモイル−5−(4−メトキシフェニル)イミダゾール(化合物No.2)
・4−クロロ−2−シアノ−1−ジメチルスルファモイル−5−(4−エチルフェニル)イミダゾール(化合物No.3)
・4−クロロ−2−シアノ−1−ジメチルスルファモイル−5−(3−メチル−4−メトキシフェニル)イミダゾール(化合物No.4)
なお、前記一般式(I)のイミダゾール系化合物は、ヨーロッパ特許公開公報第298196号及びヨーロッパ公開特許公報第705823号などに記載された方法によって製造することができる。
(1)式(I)の化合物の少なくとも1種と、プロパモカルブ塩酸塩とを有効成分として含有することを特徴とする農園芸用殺菌剤組成物。
(2) 式(I)の化合物の少なくとも1種と、プロパモカルブ塩酸塩との重量比が1:10000〜1000:1である(1)の農園芸用殺菌剤組成物。
(3)式(I)の化合物の少なくとも1種と、プロパモカルブ塩酸塩との重量比が1:200〜200:1である(1)の農園芸用殺菌剤組成物。
(4)式(I)の化合物の少なくとも1種と、プロパモカルブ塩酸塩との重量比が1:100〜1:1である(1)の農園芸用殺菌剤組成物。
キュウリべと病予防効果試験
直径7.5cmのポリ鉢でキュウリ(品種:四葉)を栽培し、2葉期に達した時に、各供試化合物を所定濃度に調整した薬液をスプレーガンを用い十分量(20ml)散布した。散布液が乾いた後にキュウリべと病胞子懸濁液を噴霧接種し、20℃で4時間湿室に保った。その後20℃の恒温室内に7日間保った後、第1葉の病斑面積率を調査し、下記計算式によって防除価を求めた。その結果を表1に示した。なお、試験は2連制で行なった。
無処理区の病斑面積は、薬液に代えて水をスプレーガンにて散布したこと以外は処理区と同様の操作を行なうことによって求められた。
防除価=(b−a)/b×100
a:処理区の病斑面積率 b:無処理区の病斑面積率
また、コルビーの式により、理論値を計算することができる。実験値がコルビーの式による理論値よりも高い場合に、本発明の農園芸用殺菌剤組成物は、植物病害の防除に関し相乗効果を有する。こういった場合におけるコルビーの式による理論値を表1の( )内に併せ示した。
キュウリべと病治療効果試験
直径7.5cmのポリ鉢でキュウリ(品種:四葉)を栽培し、2葉期に達した時に、キュウリべと病胞子懸濁液を噴霧接種し、20℃で4時間湿室に保った。その後作物を乾かしてから、各供試化合物を所定濃度に調整した薬液をスプレーガンを用い十分量(20ml)散布した。散布液が乾いた後に20℃の恒温室内に7日間保った後、第1葉の病斑面積率を調査し、下記計算式によって防除価を求めた。その結果を表2に示した。なお、試験は2連制で行なった。
無処理区の病斑面積は、薬液に代えて水をスプレーガンにて散布したこと以外は処理区と同様の操作を行なうことによって求められた。
防除価=(b−a)/b×100
a:処理区の病斑面積率 b:無処理区の病斑面積率
また、コルビーの式により、理論値を計算することができる。実験値がコルビーの式による理論値よりも高い場合に、本発明の農園芸用殺菌剤組成物は、植物病害の防除に関し相乗効果を有する。こういった場合におけるコルビーの式による理論値を表2の( )内に併せ示した。
トマト疫病予防効果試験直径7.5cmのポリ鉢でトマト(品種:ポンデローザ)を栽培し、4葉期に達した時に、各供試化合物を所定濃度に調整した薬液をスプレーガンを用いて十分量(20ml)散布した。散布液が乾いた後にトマト疫病菌の遊走子嚢懸濁液を噴霧接種し、20℃で6時間湿室に保った。その後に20℃の恒温室内に3日間保った後、下記のような各葉位の発病指数を調査し、下記計算式によって発病度を求めた。
発病指数0:病斑を認めない。
1:病斑面積が葉面積の10%未満。
2:病斑面積が葉面積の10%から25%未満。
3:病斑面積が葉面積の25%から50%未満。
4:病斑面積が葉面積の50%以上。
また、発病度を用い下記式によって防除価を求め、その結果を表3に示した。なお、試験は2連制で行なった。
無処理区の発病度は、薬液に代えて水をスプレーガンにて散布したこと以外は処理区と同様の操作を行なうことによって求められた。
発病度=[(0×A+1×B+2×C+3×D+4×E)/{4×(A+B+C+D+E)}]×100
A:発病指数0の葉数、B:発病指数1の葉数、C:発病指数2の葉数、D:発病指数3の葉数、E:発病指数4の葉数
防除価=(b'−a')/b'×100
a':処理区の発病度、b':無処理区の発病度
また、コルビーの式により、理論値を計算することができる。実験値がコルビーの式による理論値よりも高い場合に、本発明の農園芸用殺菌剤組成物は、植物病害の防除に関し相乗効果を有する。こういった場合におけるコルビーの式による理論値を表3の( )内に併せ示した。
Claims (3)
- 4−クロロ−2−シアノ−1−ジメチルスルファモイル−5−(4−メチルフェニル)イミダゾールと、プロパモカルブ塩酸塩とを有効成分として含有することを特徴とする農園芸用殺菌剤組成物。
- 4−クロロ−2−シアノ−1−ジメチルスルファモイル−5−(4−メチルフェニル)イミダゾールと、プロパモカルブ塩酸塩との混合重量比が1:150000〜1000:1である請求項1記載の農園芸用殺菌剤組成物。
- 請求項1又は2に記載の農園芸用殺菌剤組成物を植物に施用することを特徴とする植物病害の防除方法。
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