作　　者： ;

机构地区： 华南农业大学

出　　处： 《江西科学》 2001年第2期84-87,共4页

摘　　要： 通过调查研究表明棉田捕食性天敌由于化学农药的使用减少了 3 9.3 %～ 63 .0 % ,农田生态系中龟纹瓢虫、食虫蝽发生消长与棉铃虫之间相关性较强 ,分别组建了棉田、玉米田二代棉铃虫自然种群以作用因子为组分的生命表 ,分析结果表明捕食性天敌及其它非寄生因子的排除控制作用指数为 62～ 1 0 6。 The dynamics of the predatory natural enemies and their control on the cotton bollworm, Helicoverpa armigera ,were studied.The results showed that:(1)the quantity of the predatory natural enemies in the treated fields by the insecticides was reduced by 39.3%～63.0% compared to that in the untreated fields;(2)there was high correlation among the cotton bollworm and their natural enemies of the ladybirds and the stinkbugs;(3)the life table of the 2_nd generation cotton bollworm were built up according to the active factors in the cotton and corn fields.The exclusive control indices of the predatory natural enemies and other non_parasite factors were 62～106.

关 键 词： 棉铃虫 捕食性天敌 控制 种群

领　　域： [农业科学] [农业科学] [生物学]