The toxicity measurement indicates that the mixtures of 5% chlorfluazuron and 4.5% beta-cypemethrin at the four ratios all had significant synergistic activity and the 39% chlorfluazuron + 6% beta-cypermethrin is the highest one, the CTC was 367.22.

• 室内毒力测定结果表明；5%25定虫隆与4.；5%25高效氯氰菊酯4种混剂对小菜蛾均有显著的增效作用；其中混配2的增效作用最显著；其共毒系数最高为367