Indoor Toxicity and Field Efficacy of Five Strobilurins Fungicides against Phomopsis asparagi (Sacc.) Bubak

• 作者: Gao Deliang Hu Zunji Song Huawen Xu Nana Zhuang Zhanxing Zhuang Zhiguo
• 来源期刊: Plant Diseases and Pests(植物病虫害研究:英文版)
• 学科: 农学
• 关键词: STROBILURINS fungicides PHOMOPSIS asparagi(Sacc.)Bubak TOXICITY Field EFFICACY
• 年，卷（期）: 2019,（5）
• 页码范围: 31-33
• 页数: 3页
• 分类号: S48

摘要

[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.