辽宁省番茄灰霉病菌对常用杀菌剂的抗药性监测与交互抗药性

Detection of the Resistance of Botrytis cinerea on Tomato in Liaoning Province to Fungicides and Cross-resistance

[目的]明确辽宁省番茄灰霉病菌对常用药剂的抗药性及其交互抗性。[方法]采用菌丝生长速率法测定病菌对药剂的敏感性。[结果]灰霉病菌对腐霉利出现低、中抗药性;鞍山和抚顺地区抗性频率达100%,盘锦地区为40%,其他地区达70%以上;嘧霉胺抗性频率达100%;灰霉病菌对咯菌腈和啶酰菌胺均敏感。4种杀菌剂间不存在交互抗性。[结论]建议生产上暂停嘧霉胺的使用;加强对腐霉利的抗性监测;腐霉利、啶酰菌胺和咯菌腈可交替使用,延缓和治理抗药性。

[Aims] The paper aims to explicit the sensitivity ofBotrytis cinerea on tomato to fungicides and make sure if there is cross-resistance between fungicides. [Methods] The sensitivity of B. cinerea to fungicides were tested by measuring mycelial growth rate. [Results] The resistant isolates of B. cinerea in Liaoning were detected to procymidonc and the resistant frequenc~ of isolates in Anshan and Fushun reached to 100% and 40% in Panjin. The resistant frequence of isolates to pyrimethanil reached to 100%. The isolates were sensitive to fludoixonil and boscalid. There is not cross-resistance between fungicides. [Conclusions] Pyrimcthanil should be suspended application on tomato. Monitering resistance of B. cinerea to pmcymidone should be strongthencd. The isolates of B. cinerea were sensitive to fludoixonil and boscalid. The alternate use of procymidone, boscalid and fludoixonil should bc applied to postpone and manage the resistant isolates.