一、为什么要了解杀虫药剂的持久毒性 杀虫药剂的“持久毒性”,也就是它的药效期有多长,了解它在生产实践上有一定意义。 许多种杀虫药剂对人畜有一定毒性的,有的毒性还很大,如1059等。研究这些杀虫药剂的持久毒性,就可以了解它们需要多长时间能够分解、消失到对人畜安全的程度。 在防治害虫时,有很多种害虫的发生时期不很整齐,一般要求一次适期的施药,杀死最大数量的害虫。这个施药的适期往往决定于杀虫药剂的持久毒性。类如特捕(TFPP)、敌敌畏及除虫菊酯等残 First, why do you know the “long-term toxicity” of long-lasting toxic insecticide pesticides, that is, how long its efficacy period, to understand it has some significance in the production practice. Many kinds of pesticides have some toxicity to humans and animals, some are still very toxic, such as 1059 and so on. Studying the long-lasting toxicity of these pesticides shows how long it takes them to decompose and disappear to the point of being safe to humans and animals. In the control of pests, there are many kinds of pest occurrence period is not very neat, generally require a proper application of pesticides to kill the maximum number of pests. The duration of this application often depends on the long-term toxicity of the insecticide. Class such as special capture (TFPP), dichlorvos and pyrethrins residues