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多异瓢虫Adonia variegata Goeze是棉蚜的重要天敌,对控制棉花蕾铃期蚜害有显著作用。作者通过对该虫自然种群生命表的研究,提出影响棉田一、二、三代多异瓢虫死亡的主要原因是自然损失和被捕食,死亡率较高的阶段为印至二龄幼虫期,其中以一龄幼虫期为死亡率最高的关键阶段。
Adonia variegata Goeze is an important natural enemy of cotton aphid and plays a significant role in controlling aphid damage in cotton boll stage. Based on the study of the natural population life table of the pest, the author suggests that the main causes of the death of the first, second and third generation ladybugs in the cotton field are natural loss and predation, and the higher mortality stage is from the second to the second instar larvae The first instar larvae are the most critical stage of mortality.