不同杀菌剂对油梨溃疡病菌的抑菌效果

Inhibitory Effect of Different Fungicides on Avocado Canker

[目的]筛选有效抑制油梨溃疡病菌的杀菌剂。[方法]采用菌丝生长速率法测定了8种杀菌剂对油梨溃疡病的抑菌作用。[结果]对油梨溃疡病菌的毒力最强的是45%咪鲜胺EW,其EC50为0.0274 mg/L;其次是40%氟硅唑EC和10%苯醚甲环唑WDG,其EC50分别为0.1031 mg/L和0.1361 mg/L;40%丙环唑ME的EC50为0.2577 mg/L,其抑菌作用也较强;30%醚菌酯与43%戊唑醇SC的EC50分别为3.3386 mg/L和3.3692 mg/L,其抑菌作用较差;25%烯唑醇EC及25%三唑酮WP的抑菌作用最差,其EC50分别为13.5509 mg/L、24.8385 mg/L。[结论]45%咪鲜胺EW、40%氟硅唑EC、10%苯醚甲环唑WDG、40%丙环唑ME、30%醚菌酯SC、43%戊唑醇SC对油梨溃疡病菌的生长有一定的抑制作用。

[Aims] Screening fungicides effective suppression of avocado canker. [Methods] Toxicity of eight fun-gicides on avocado canker were measured using mycelium growth rate method. [Results] The toxicity of 45% Pro-chloraz EW was the strongest, with the EC50 of 0.0274 mg/L, followed by 40% Flusilazole EC and 10% Difenocon-azole WDG with the EC50 of 0.1031 mg/L and 0.1361 mg/L. EC50 of 40% Propiconazole ME, 30% Kresoxim-methylSC and 43% Tebuconazole SC were 0.2577 mg/L, 3.3386 mg/L and 3.3692 mg/L. The sensitivity of avocado canker25% Diniconazole EC and 25% Triadimefon WP were lower than others. [Conclusions] 45% Prochloraz EW, 40%Flusilazole EC, 10% Difenoconazole WDG, 40% Propiconazole ME, 30% Kresoxim-methyl SC and 43% Tebucon-azole SC can effectively inhibit the growth of avocado canker.