<![CDATA[The interaction of brown planthopper with its natural enemies can be represented in a
predator-prey model. In this research, predator prey model influenced by insecticide is
discussed. It is assumed that insecticide is applied at only one time when the population of
brown planthopper is rised. The simulation results indicate that the brown planthopper
population could be reduced significantly, but only in a moment. For a long periods of time, the
brown planthopper population and their natural enemies will be oscillated and lead to the
specified value. This means, the brown planthopper populations for long periods of time only
depends on the mortality rate of predator and the level of interaction of the brown planthopper
and predators.]]>
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