斜纹夜蛾NPV对取食不同蔬菜的斜纹夜蛾幼虫的毒力差异

采用生物测定法，比较了斜纹夜蛾ＮＰＶ对取食芋叶等７科８种蔬菜的斜纹夜蛾幼虫的毒力反应差异性。结果表明ＮＰＶ对取食番茄叶的幼虫毒力最高，比取食芋叶的毒力高６．８２倍；但再经菜心饲养一代后，ＮＰＶ的毒力差异消失。

Toxicity difference of NPV to larvae of Prodenia litura Fabricius feeding on different vegetables

Toxicity difference of cotton leafworm NPV to larvae of cotton leaf worm feeding on & vegetables of 7 families has been studied through bioassay. The results indicate that the toxicity difference is remarkable, and the LC_50 to the larvae feeding on tomato leaf is 6. 82 times higher than to the larvae feeding on taro leaf. But the toxicity difference disappeares when larvae feeding on Chinese flowering cabbage in next generation.