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农药的适期应用,不仅可以节约农药、降低成本,而且可以提高防治效果,减少药物残留,有效控制病虫草的危害,保证作物的正常生长。在确定施药适期时,应从以下几个方面进行考虑: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、成虫盛发期,究竟在哪个时期用药防治效果最为明显,要视具体情况而定。原则上是要掌握害虫的生活习性,在最易杀伤害虫,并能有效地控制危害的阶段进行。如防治粘虫,在卵块孵化高峰期喷药,虽对已孵化的幼
Appropriate application of pesticides, not only can save pesticides, reduce costs, but also can improve the control effect, reduce drug residues, effectively control the harm of pests and diseases, and ensure the normal growth of crops. Pesticide should be considered in the following aspects when determining the appropriate application period: Pest prevalence period: For pests, the pest infestation period can be the period of egg hatching, larvae, adult period, which is Period of drug prevention and treatment of the most obvious effect, as the case may be. In principle, it is necessary to grasp the habits of the pests and carry them out at the stage where pests are most easily killed and the harms can be effectively controlled. Such as the prevention and control of armyworms, spraying the peak incubation period in the egg, although hatched young