13种杀菌剂对草坪新月弯孢菌的毒力测定及应用分析

Toxicity and apply of 13 kinds of fungicides on Curuularia lunata

采用室内生长速率法测定了敌力脱、世高、适乐时、阿米西达及奥美灵系列等13种供试杀菌剂对新月弯孢菌Curuularialunata(Walker)Beodijn的抑制作用,得到13条毒力回归曲线及相应的EC50.结果表明:世高、甲基托布津、雷多米尔、奥美灵3号等4种供试药对新月弯孢菌具有极强的毒力;适乐时、敌力脱、AF 136、AF 137、阿米西达等5种供试药对新月弯孢菌的毒力作用较强;而奥美灵2号、奥美灵1号、2116、奥美灵4号等4种供试药剂,对离体条件下培养的新月弯孢菌抑制作用不明显.

The toxicity of 13 kinds of fungicides on Curuularia lunata, like Tilt, Score, Celest, Amistar, Aomeiling, and so on, were measured by the method of growth ratio. Their regressive equations and EC_(50) were calculated. The results demonstrated that there were 4 kinds of fungicides, such as Score, Topsin-m,Ridomil and Aomeiling3, which could inhibit C. lunata very effectively; The toxicities of Celest, Tilt, AF-136, AF-137 and Amistar had also highly inhbitant, but they had less effect than the former 4 fungicides; The effects of Aomeiling2, Aomeiling1, 2116 and Aomeiling4 on C. lunata were not significant. The experimental results would be useful to the further studies on the selection of effective fungicides and the optimal mixture of fungicides on Curuularia lunata.