摘要
研究了经印楝素处理后斜纹夜蛾[Spodopteralitura(Fabricius)]5龄幼虫的取食行为.结果表明:斜纹夜蛾5龄幼虫24h内发生的取食活动和取食间间隔的次数减少,平均每次取食活动和取食间间隔持续的时间延长;在每次取食活动中,用于取食的时间明显减少,这主要是因为在每次取食活动中,取食内间隔的次数增加了,并且取食内间隔的时间也延长了.所有上述有关取食行为的指标,处理虫与对照虫之间均存在显著或极显著的差异.
Effect of azadirachtin on the feeding behavior of the fifth instar larvae of tobacco cutworm [ Spodoptera litura ( Fabricius) ] eating flowering Chinese cabbage ( Brassica campestris L. ssp. chinensis var. utilis Tsen et Lee) leaves was quavtitatively described through continual observation for 24 h in the laboratory. Six larvae treated by their host plant leaves were sprayed with Margosan O in the petri dishes and the control group was sprayed with water. The result showed that the temporal feeding patterns of the six larvae which were treated with Margosan O were different from those untreated. The meal length, the net time spent eating in a meal, the inter feeding gap and the intra feeding gap length, the boult numbers and the numbers of the two types of gaps of the larvae treated with Margosan O were significantly different from those untreated.
基金
云南省中青年学术和技术带头人培养经费资助
关键词
斜纹夜蛾
幼虫
印楝素
拒食剂
取食行为
Spodoptera litura
larvae
azadirachtin
antifeedant
feeding behavior