不同昆虫病毒对斜纹夜蛾和甜菜夜蛾的联合增效作用

Synergism of Different Insect Virus to Spodoptera litura and Spodoptera exigua

测定了多种病毒组合对斜纹夜蛾和甜菜夜蛾的联合增效作用。结果表明:八字地老虎颗粒体病毒(XcGV)、银锭夜蛾质型多角体病毒(McCPV)可明显提高斜纹夜蛾核多角体病毒(SlNPV)对斜纹夜蛾的杀虫速度,其中XcGV可使SlNPV对斜纹夜蛾3龄幼虫LT50缩短了0 5～2 5d;McCPV可使其缩短0 6～2 9d,但未提高其杀虫毒力。XcGV亦可提高SlNPV和XcNPV对甜菜夜蛾的杀虫速度,分别使甜菜夜蛾2龄幼虫LT50缩短1 3和1 7d。

The synergism of Spodoptera litura, Mamestra brassicae, He li vocerpa armigera, Xestia cnigrum nucleopolyhedrovirus combined with X. c nigrum granulosis virus and Macdunoughia confusa cytoplasmic polyhedrosis virus on S. litura and S. exigua were studied. The results showed that the combination of SlNPV with XcGV and McCPV shortened the duration of infection in S. litura, XcGV and McCPV could decreased the lethal time of 50 percents individuals (LT50) of 3rd instar larvae 0.5-2.5d and 0.6-2.9d, respective ly. And XcGV also shortened the lethal duration of SlNPV and XcNPV on S. exig ua, the LT50 of 2nd instar larvae decreased by 1.3 and 1.7d respectively . But the above insect viruses didn't increase the infection capability. 