ピラゾール誘導体の植物病害防除効果 I

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The purpose of this work is to evaluate the contro1ing effect of 36 3-methylpyrazole derivatives upon rice blast, sheath blight and bacterial leaf blight of rice and cucumber anthracnose in greenhouse. The relationship between the structural modifications of 3-methylpyrazole derivatives and their protective effect upon rice blast was intimate, but not on sheath blight of rice and cucumber anthracnose, and also their therapeutic effect on bacteria1 1eaf blight of rice was not intimate. Some 3-methylpyrazo1e derivatives substituted at l-position with p-nitropheny1 or p-ha1ogenophenyl group, at 4-position with SCN or without SCN, and at 5-position with CH_3 or C_6 H_5 showed good protective effect upon rice blast, and substitution with SCN at 4-position was more effective than that without SCN, and both 3-methy l-4-thiocyanatopyrazole derivatives substituted at 5-position with CH_3 and those at 5-position with C_6H_5 were similarly effective. Three pyrazo1e derivatives, i. e. 3,5-dimethy-1-(2-nitrophenyl)-4-thiocyanatopyrazole, 3-methyl-1, 5-diphenyl-4-thiocyanatopyrazo1e, and 3, 5-dimethyl-1-(4-nitrophenyl)-4-thiocyanatopyrazole, showed good protective effect and a 1ittle less sporulation inhibiting effect on rice blast, whi1e they were not effective in the therapeutic test. In the seed1ing bed test in field these three componds were less effective than blasticidin S as a blast control agent.(Received November 30, 1965)
日本植物病理学会の論文
1966-06-30

ピラゾール誘導体の植物病害防除効果 I

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