不同杀菌剂对油梨炭疽病菌的抑菌效果

摘要

In order to screen fungicides effectively suppressing A.anthracnose,toxicity of eight fungicides on A.anthracnose were measured.Results:The toxicity of 10% difenoconazole WDG was the strongest,with the EC50 of 2.829 1 mg/L,followed by 80% ethylicin EC and 25% bromothalonil WP with the EC50 of 13.522 8 mg/L and 16.698 3 mg/L,45% prochloraz EW and 70% Thiophanate-Methyl WP with the EC50 of 36.5306mg/L and 192.838 6 mg/L. The sensitivity of pepper anthracnose 75%chlorothalonil WP ,80% mancozeb WP and 80% captan WDG were lower than others.10% difenoconazole WDG,80% ethylicin EC,25% bromothalonil WP,45% prochloraz EW and 70% Thiophanate-Methyl WP can effectively inhibit the growth of A.anthracnose.%为了筛选有效抑制油梨炭疽病菌的杀菌剂，测定了8种杀菌剂对油梨炭疽病菌的室内抑菌率和毒力。结果表明：抑菌率较高的是45％咪鲜胺EW和70％甲基硫菌灵 WP，达72％以上；其次是25％溴菌清 WP、10％苯醚甲环唑 WDG 和80％乙蒜素 EC，抑菌率均大于61％；80％代森锰锌 WP、75％百菌清WP和80％克菌丹 WDG 抑菌率较低。对油梨炭疽病菌毒力最强的是10％苯醚甲环唑 WDG，EC50为2．8291 mg/L；其次是80％乙蒜素 EC和25％溴菌清 WP，EC50分别为13．5228 mg/L和16．6983 mg/L。结论：10％苯醚甲环唑 WDG、80％乙蒜素EC、25％溴菌清 WP、45％咪鲜胺 EW和70％甲基硫菌灵 WP对油梨炭疽病菌的生长有一定的抑制作用。