农药适期施用,不仅可以节约农药,降低成本,而且能提高防治效果,减少药物残留,有效控制病虫危害,保护天敌,维持田间生态平衡。在确定施药适期时,应注意从以下几个方面考虑:一、害虫盛发期对于害虫来说,害虫盛发期可以是卵孵盛期、幼虫盛发期和成虫盛发期,究竟在哪个时期施药,要视具体情况而定。原则上要掌握害虫的生活习性,在最易杀伤害虫,并能有效控制危害的阶段进行。如防治粘虫,在卵块孵化的高峰期 The proper application of pesticides can not only save pesticides, reduce costs, but also improve the control effect, reduce drug residues, effectively control pests and diseases, protect natural enemies and maintain the ecological balance in the field. In determining the appropriate period of application, should pay attention to consider the following aspects: First, pests flourishing period For pests, pests flourishing period can be egg hatching Sheng, larvae Sheng and adult Sheng period, after all At what time the application of drugs, as the case may be. In principle, it is necessary to grasp the pest’s habits and habits at the stage where pests are most easily killed and can effectively control the damage. Such as the prevention and control of armyworms, egg peak in the incubation period