吉林省人参黑斑病菌对常用药剂的抗药性监测及交互抗药性测定

Detection of the Resistance of Alternaria panax and Cross-resistance on Ginseng in Jilin Province

[目的]明确吉林省人参黑斑病菌对常用药剂的抗药性及交互抗性。[方法]采用生长速率法测定人参黑斑病菌对常用药剂的敏感性。[结果]室内毒力测定结果表明,嘧菌酯对人参黑斑病的毒力最强,其平均EC_(50)值为1.14 mg/L。其中嘧菌酯、吡唑醚菌酯、腐霉利和代森锰锌之间不存在交互抗药性。[结论]建议加强对代森锰锌的抗性监测,嘧菌酯、吡唑醚菌酯、腐霉利和代森锰锌可交替使用以延缓和治理抗药性。

[Aims] This paper aims to clarify the sensitivity of Alternaria panax on ginseng to fungicides and to make sure whether there is cross-resistance between fungicides. [Methods] The sensitivities of A. panax to fungicides were tested by mycelial growth rate. [Results] The results in laboratory showed that azoxystrobin have the best toxicity against A. panax with the average EC_（50） of 1.14 mg/L. There is no cross-resistances among azoxystrobin, pyraclostrobin,procymidone and mancozeb. [Conclusions] We suggest that resistance monitoring of A. panax to mancozeb should be strengthened. The alternate use of azoxystrobin, pyraclostrobin, procymidone and mancozeb should be applied to postpone and manage resistance.