摘要： 选择与球孢白僵菌相容性好的4种杀虫剂甲维盐、除尽、铁沙掌和康夫。用它们的亚致死剂量和次亚致死剂量分别与白僵菌菌悬液复配,对甜菜夜蛾进行室内毒力测定。结果表明,含农药浓度高的复配剂的杀虫效果好于含低剂量农药的复配剂;且杀虫效果好的农药,其复配剂的防效也高。在第2天时,含甲维盐和除尽的复配剂校正防效达到了53%~70%,到第10天,校正防效达到了92%以上,其中含甲维盐的复配剂的防效都达到了97.7%。

关键词: 球孢白僵菌, 化学杀虫剂, 生物相容性, 防效

Abstract: Six kinds of insect icides and three kinds of fungicides at convent ional field use concentrations were measured to determine the effects on mycelial growth of B. bassiana. In terms of the result, four kinds of insecticides with more compatiblity were picked out, that is Jiaweiyan, Chujin,Tieshazhang and Kangfu.Then, the four insecticides at 1/ 5 and 1/ 10 conventional field use concentrations were mixed with the suspension of B. bassiana at concentration of 1×10⁷ spores/mL respectively to study the effects of the mixture aginst Spodoptera exigua. As a consequence, the mixture containing insecticides at low concentrat ion were less effective than that at high concentration. Two days after treatment, thecontrolling effects of the mixture containing Jiaweiyan and Chujin increased to 53% - 70%. Ten days after treatment, thecontrolling effects were up to over 92%, and the controlling effects of the two kinds of mixture containing Jiaweiyan bothincreased to 97.7%. In the mixture, the pesticide was the key factor of high controlling effects, while B. bassiana wascritical to persistent controlling effects. Therefore, the mixture involved B. bassiana and Jiaweiyan or Chujin at low concentrat ion should be electded in order to get high and persistent controlling effects.

Key words: Beauveria bassiana, Chemical insecticide, Biotic compatibility, Controlling effect

中图分类号: 

• S433.4