种群数量控制指数及其应用

THE CONSTITUTION AND APPLICATION OF POPULATION CONTROL INDEX

In this paper,an index of population control (IPC) is proposed for evaluating the effect of control factors on life system of population.It is expressed by the reciprocal of survival rate caused by the act on intrinsic components of system,or the survival ratio of that after action to the original.That is to say,IPC is the multiple causing change of population dynamic trend.By applying IPC,the rice case worm Cnaphalocrocis medinalis,rice brown planthopper Nilaparvata lugens,and paddy stem borer Scirpophaga incertulas were used as examples to discuss the effects of natural enemy,in secticide,and transplanting time on life system control of insect pest population.The IPC is contributed to the study on integrated pest control strategy.