番茄灰霉病菌(Botrytis cinerea)对3种杀菌剂的抗性监测及交互抗药性研究

采用菌丝生长速率法,测定了采自江苏和河南的158株番茄灰霉病菌对嘧菌酯、啶酰菌胺、啶菌(噁)唑等3种药剂的敏感性,并研究了部分抗性菌株的交互抗性情况.结果显示,供试菌株对嘧菌酯、啶酰菌胺、啶菌(噁)唑的EC50值分别在0.004 5～90.5、0.057 6～36.8、0.016 9～2.64μg/mL,并分别出现了 ...

Resistance Monitoring and Cross-resistance Study of Botrytis cinerea to Three Fungicides

The sensitivity of 158 Botrytis cinerea strains,which were collected from Jiangsu and Henan to azoxystrobin,boscalid and SYP-Z048 were determined by mycelial growth method,as well as the cross resistance of some resistant strains were also studied.The results showed that the EC50 values of the tested strains to azoxystrobin,boscalid and were 0.0045-90.5,0.0576-36.8 and 0.0169-2.64μg/mL,respectively.There were 19.0%,11.4% and 0.6% frequency of resistant strains,respectively.As a whole,the resistance level of Jiangsu strains was higher than that of Henan regions.Botrytis cinerea has cross-resistance to azoxystrobin,kresoxim-methyl,trifloxystrobin and pyraclostrobin,and cross-resistance to boscalid,carboxin and thifluzamide,but no cross-resistance to flupyramide.The problem of multi-drug resistance already exists in the pathogen population.One pathogen has resistance to azoxystrobin,boscalid and SYP-Z048 simultaneously,while 17 isolates have resistance to azoxystrobin and boscalid simultaneously.