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[目的]明确河南省番茄灰霉病菌对苯胺基嘧啶类杀菌剂嘧霉胺的抗药性状况。[方法]采用菌丝生长速率法测定从河南省不同保护地中采集、分离的101株番茄灰霉病菌对嘧霉胺的敏感性。[结果]高抗菌株8株(7.92%),中抗菌株52株(51.49%),低抗菌株22株(21.78%),敏感菌株19株(18.81%)。[结论]河南省番茄灰霉病菌已对嘧霉胺产生不同水平的抗药性,各地应合理更换或轮换使用与嘧霉胺无交互抗性的药剂,以确保番茄灰霉病的有效控制。
[Objective] The research aimed to clarify the resistance of Botrytis cinerea to the anilinopyrimidine bactericide pyrimethanil in Henan Province. [Method] The mycelial growth rate method was used to determine the sensitivity of 101 Botrytis cinerea isolates collected from different protected areas in Henan Province to pyrimethanil. [Result] There were 8 strains with high antibacterial activity (7.92%), 52 strains with moderate antibacterial activity (51.49%), 22 strains with low antibacterial activity (21.78%) and 19 strains with sensitivity activity (18.81%). [Conclusion] Botrytis cinerea in Henan Province had different levels of resistance to pyrimethanil, and should be rationally replaced or rotated with the agents that did not interact with pyrimethanil to ensure the effective control of tomato gray mold disease.