作　　者： ; ;

机构地区： 华南农业大学

出　　处： 《华南农业大学学报》 2000年第1期34-37,共4页

摘　　要： 通过田间系统调查和室内观察，组建以作用因子组配的小菜蛾自然种群连续世代生命表．结果表明：春季小菜蛾连续两代种群趋势指数为１１.９，而秋季为２４.４，比春季高出一倍多.菜蛾啮小蜂是影响春季小菜蛾种群数量的重要因子，对连续两代小菜蛾种群的排除作用控制指数（ ＥＩＰＣ）为 ８. ２８，其次为菜蛾绒茧蜂， ＥＩＰＣ为 ４. ８５；在秋季，菜蛾绒茧蜂的作用仅次于 ４龄幼虫的捕食及其它， ＥＩＰＣ为 ３． ６７，菜蛾啮小蜂的作用较低，其 ＥＩＰＣ仅为 １.２。 Based on the data of systematic survey in the field and observation in the laboratory, the natural population life tables of continuous two generations of the diamondback moth (DBM) , Plutella xylostella L., were constructed on one cropping of flowering Chinese cabbage in Shenzheng, Guandong Province. The results showed that the indices of population trend of two continuous generations of DBM were 11. 9 and 24. 4, respectively in spring and autumn. Parasitoids played a determinant role in the control of natural population of DBM. In spring, the important factor influencing the natural population of DBM was the larval-pupae parasitoid, Oomyzus sokolowsakii (Kurdjumov), which exclusive index of population control (EIPC) reached 8. 28. While the EIPC of Cotesia plutellae Kurdjumov was 4. 85. In autumn, C. plutellae was the secondly important factor influencing the natural population of DBM, which EIPC was 3. 67. The low EIPC (1 .2) of O. sokolowsakii caused a high population increase of DBM in autumn.

关 键 词： 小菜蛾 连续世代生命表 种群趋势指数 蔬菜害虫

领　　域： [农业科学] [农业科学] [生物学]