IPM is an effective pest control method that uses information on the life cycle of the pest and incorporates nonchemical and chemical methods.
这种方法是一种有效的综合运用非化学和化学方法的方法，并充分利用害虫生长周期的一种方法。
In this paper predator-prey systems with periodic impulsive effect concerning pest control are proposed through biological control and chemical control.
摘要本文通过生物控制和化学控制提出了具有周期脉冲效应与害虫控制的捕食系统。
He says collaborators are trying to reformulate the liquid chemical into a powder form that might be more useful in pest control.
他说合作者正在尝试改良液体的生物碱成粉末状便于用在害虫防治上。
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