The interference index of population control,IIPC was used to evaluate the control effect of Avermectins,Yasimie and Yasimiejin on peach-aphid.

应用干扰作用控制指数法评维菌素、虱灭、虱蓟净等杀虫剂对桃种群控制的作用。

In this paper,we study the permanence of populations of a competing chemostat model in a polluted environment.Population control is also dealt with for the model without inter species competitionin.

讨论污染的竞争恒型的永久持续生存性,当种群只有种内竞争时考虑种群的控制问题。