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在直径90 mm培养皿中进行了经饥饿处理的异色瓢虫成虫对同时存在的等数量桃蚜和温室白粉虱若虫、棉蚜和温室白粉虱若虫、西花蓟马和温室白粉虱若虫捕食偏嗜性研究。结果表明,在桃蚜和温室白粉虱若虫同时存在条件下,异色瓢虫成虫对其捕食更偏嗜桃蚜。但是,随着瓢虫饥饿时间延长,捕食选择性减低;在棉蚜和温室白粉虱若虫同时存在条件下,异色瓢虫成虫对其捕食较偏嗜棉蚜;在西花蓟马和温室白粉虱同时存在条件下,异色瓢虫成虫对其捕食更偏食西花蓟马。各试验中对温室白粉虱的捕食效果普遍较差。
Adult starved adults of Harmonia axyridis with a diameter of 90 mm were subjected to simultaneous prey of the same number of Myzus persicae and Greenhouse whitefly nymphs, cotton aphids and green housefly nymphs, western flower thrips and green housefly nymphs Biopharmaceutical research. The results showed that adult Myzus persicae was more susceptible to Myzus persicae than other species of Myzus persicae in the presence of Myzus persicae and Greenhouse feverfew. However, as the ladybug hungry for a longer time, prey selectivity was reduced. In the presence of both cotton aphid and greengreen whitefly nymphs, adult C. elegans had a predilection for predation on cotton aphid; Under the condition of lice, the adult Chrysomelopsis ochrocephala had more preference for F. occidentalis on its predation. The predation effect of whitefly on greenhouse was generally poor in all the experiments.