[Objective]The study was to evaluate the indoor toxicity and field efficacy of five Strobilurins fungicides including pyraclostrobin 250 g/L EC,azoxystrobin 250 g/L SC,kresoxim-methyl 50%WG,picoxystrobin 22.5%SC and t...[Objective]The study was to evaluate the indoor toxicity and field efficacy of five Strobilurins fungicides including pyraclostrobin 250 g/L EC,azoxystrobin 250 g/L SC,kresoxim-methyl 50%WG,picoxystrobin 22.5%SC and trifloxystrobin 50%WG against Phomopsis asparagi(Sacc.)Bubak,and to screen out effective fungicides.[Method]The toxicity was tested by mycelial growth rate method.The field trials were carried out by routine spraying method.[Result]The indoor toxicities successively were pyraclostrobin>kresoxim-methyl>picoxystrobin>trifloxystrobin>azoxystrobin.The EC50 values were 6.1029,52.5591,83.8257,129.8616 and 252.1214 mg/L,respectively,all significantly higher than that of benzimidazole fungicide carbendazim(753.3650 mg/L).The field efficacies successively were pyraclostrobin>kresoxim-methyl≥picoxystrobin≥azoxystrobin≥trifloxystrobin.The control effects were 81.20%,77.95%,74.80%,71.69%and 68.54%,respectively,all significantly higher than that of benzimidazole fungicide carbendazim(48.27%).[Conclusion]The five Strobilurins fungicides all have good toxicity and field efficacy against P.asparagi.展开更多
基金Supported by Agricultural Science and Technology Innovation Project of Shandong Academy of Agricultural Sciences"Key Technology for Green Prevention and Control of Diseases and Insect Pests of Major Crops"(CXGC2018E19).
文摘[Objective]The study was to evaluate the indoor toxicity and field efficacy of five Strobilurins fungicides including pyraclostrobin 250 g/L EC,azoxystrobin 250 g/L SC,kresoxim-methyl 50%WG,picoxystrobin 22.5%SC and trifloxystrobin 50%WG against Phomopsis asparagi(Sacc.)Bubak,and to screen out effective fungicides.[Method]The toxicity was tested by mycelial growth rate method.The field trials were carried out by routine spraying method.[Result]The indoor toxicities successively were pyraclostrobin>kresoxim-methyl>picoxystrobin>trifloxystrobin>azoxystrobin.The EC50 values were 6.1029,52.5591,83.8257,129.8616 and 252.1214 mg/L,respectively,all significantly higher than that of benzimidazole fungicide carbendazim(753.3650 mg/L).The field efficacies successively were pyraclostrobin>kresoxim-methyl≥picoxystrobin≥azoxystrobin≥trifloxystrobin.The control effects were 81.20%,77.95%,74.80%,71.69%and 68.54%,respectively,all significantly higher than that of benzimidazole fungicide carbendazim(48.27%).[Conclusion]The five Strobilurins fungicides all have good toxicity and field efficacy against P.asparagi.
