川楝素对斜纹夜蛾幼虫取食行为的影响  

Effect of toosendanin on larva feeding behavior of tobacco cutworm[Spodoptera litura (Fabricius)]

作　　者：李云寿[1] 邹华英[1] 胡萃[2] 赵善欢[3] 

机构地区：[1]云南省农业科学院生物技术研究所,昆明650223 [2]浙江农业大学植物保护系,杭州310029 [3]华南农业大学植物保护系,广州510642

出　　处：《华东昆虫学报》1999年第2期99-102,共4页Entomological Journal of East China

基　　金：云南省中青年学术和技术带头人培养经费资助

摘　　要：斜纹夜蛾５龄幼虫的取食活动是非连续进行的。在每两次取食活动之间存在一个取食间间隔，在每次取食活动期间，也存在一非常短暂的取食内间隔。经川楝素处理后的斜纹夜蛾５龄幼虫，其２４小时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；可是在每次取食活动中，用于取食的时间明显减少。这是因为，取食内间隔的次数增加了，取食内间隔的时间也延长了。所有上述指标，处理虫与对照之间均存在着显著或极显著的差异。Feeding activities of the 5th instar larva of tobacco cutworm [Spodoptera litura (Fabricius)]were shown to occur in discrete boults (or meals). There was an inter-feeding gap between every two feeding boults, and a very short inter-feeding gap in each boult. The 5th instar larvae sprayed with toosendanin in this experiment, compared with the untreated larvae, had the decreaced, number of feeding bouts and inter-feeding gaps , but the prolonged. length of feeding boults and inter-feeding gaps. However, the eating time in a meal is shortened because the number of inter-feeding gaps increased and the inter-feeding gaps prolonged. All the above-mentioned feeding behavior indices of the treated larvae were significantly different from those untreated.

关 键 词：取食行为 斜纹夜蛾 幼虫 川楝素 次数 发生 延长 间隔 活动 

分 类 号：Q111.7[生物学—普通生物学] S435[农业科学—农业昆虫与害虫防治]