6种杀菌剂对马铃薯晚疫和辣椒枯萎病菌的室内毒力测定

为筛选出有效防治马铃薯晚疫病和辣椒枯萎病的药剂，采用茵丝生长速率法，测定了6种杀菌剂对马铃薯晚疫病菌和辣椒枯萎病菌的抑菌作用。6种杀菌剂中，25％咪鲜胺EC对2种病原菌的毒力最强，EC50值分别为0．032mg／L和0．089mg／L；氟环唑和己唑醇次之；12．5％腈茵唑EC和粉唑醇抑制效果较好；50％甲基硫菌灵WP的毒力最差。25％咪鲜胺EC，氟环唑和己唑醇均可有效抑制2种病原茵的生长，可进一步用于田间试验。

Indoor Toxicity Measurement of Six Fungicides on Phytophthora infestans from Potatoes and pepper Fusarium oxysporum

In order to select fungicides that can effectively bacteriostasis of six fungicides on Phytophthora infestans control Potato Late Bright and Pepper Fusarium wilt , from Potatoes and Pepper Fusarium oxysporum was measured using mycelium growth rate method. The toxicity of prochloraz 25% EC was the most effective one to the pathogen with the EC50 of 0. 032 mg/L and 0. 089 mg/L respectively. Epoxiconazole and hexaconazole were lesser. Myclobutanil 12.5% EC and flutriafol also had well control effect to the pathogen . While thiophanate - methyl 50% WP was lower than others. Prochloraz 25% EC, epoxiconazole and hexaconazole could effectively inhibit the growth of Phytophthora infestans from Potatoes and Pepper Fusarium oxysporum and could be used in field trials.