采用田间调查和室内实验 ,研究了多异瓢虫的种群消长规律和捕食功能 ,表明该虫在棉田发生量大 ,发生时间长 ,幼虫、成虫对棉蚜的功能反应均为 Holling- 型 ,并随着幼虫的生长其捕食量逐渐增大。 Field investigation and laboratory experiments were conducted to study the population dynamics and predation function of the ladybugs. The results showed that the larvae had a large amount of occurrence in the cotton field and took a long time to develop. The functional responses of larvae and adults to the cotton aphid were Holling-type As the larvae grow their predators increases.