关键词: 敌敌畏, 豆类蔬菜, 土壤, 残留, 降解

Abstract: Some field experiments were taken on the degrading process of dichlorvos residing in bean vegetables (green soy bean, pea, cowpea) and soil.The results showed that when the 80% dichlorvos oil was used at rates of 500~2 000 times, the degradation rate of dichlorvos was higher than 93%.3 d after sprayed, the degradation rate was over 99%, and the residue content was tested less than 0.02 mg/kg.5 d after sprayed, its residue could not be tested out in any bean vegetable.The degradation of dichlorvos residing in soil for pea growing conform to the regulation of the classical power rate.DT₅₀ of dichlorvos was 4.3 d.

Key words: dichlorvos, bean vegetables, soil, residue, degradation