【摘要】 利用室内浸渍法测定了双甲脒与溴氰菊酯、氰戊菊酯混用对麦长管蚜( M acrosiphum avenae F.)的增效作用。溴氰菊酯、氰戊菊酯与双甲脒均以2∶1比例混合时 ，增效作用最为显著；但当溴氰菊酯与双甲脒以15∶1混用，氰戊菊酯与双甲脒以1∶10混用 时会产生严重的拮抗作用，与分别使用各单剂时相比效果明显降低。更多还原

【Abstract】 The synergistic effects of the mixed insecticides of deltamethrin or fenvalerate with amitraz were determined in laboratory with immersion method. The results showed that the synergistic eff ect was the most remarkable when the ratio of deltamethrin or fenvalerate to amitraz was 2∶1,but an antagonistic effect would be displayed when the ratios were set at 15∶1 and 1∶10, respectively.更多还原