农药在植物体内的残留量.与间隔的时间有关,最后一次施药与收获间隔的时间越长,其残留量愈低。一般作喷洒施用的农药,大体上可分为以下几个类型:一、高效低毒残效期短的药剂。例如敌百虫、敌敌畏、马拉松、林丹等,施药后五—十天农产品就可以采收食用。二、高效低毒残效较长的药剂、如乐果、西维因等,施药后十—十四天农产品 Residues of pesticides in plants are related to the time interval, the longer the last application and harvest interval, the lower the residual amount. Generally applied for spraying pesticides, in general, can be divided into the following types: First, efficient and low toxicity residual short duration of the agent. For example trichlorfon, dichlorvos, marathon, lindane, etc., five to ten days after the application of agricultural products can be harvested. Second, high efficiency and low toxicity Pharmacists with longer residual effects, such as dimethoate, Cibidir, etc., ten to fourteen days after application of agricultural products