The Effect of Insecticide on Predator-prey Model to Control the Brown Planthopper

摘要

The interaction of brown planthopper with its natural enemies can be represented in apredator-prey model. In this research, predator prey model influenced by insecticide isdiscussed. It is assumed that insecticide is applied at only one time when the population ofbrown planthopper is rised. The simulation results indicate that the brown planthopperpopulation could be reduced significantly, but only in a moment. For a long periods of time, thebrown planthopper population and their natural enemies will be oscillated and lead to thespecified value. This means, the brown planthopper populations for long periods of time onlydepends on the mortality rate of predator and the level of interaction of the brown planthopperand predators.