Under the same environmental condition, the order of half-life period of the four types of organophosphorus pesticide from long to short is: methamidophos>dimethoate>equigard>trichlorton.5.

• 4、相同环境条件下，四种有机磷农药的半衰期(T_(0.；5))从大到小依次为：甲胺磷＞乐果＞敌敌畏＞敌百虫。