两种毒死蜱乳油制剂有效成分在水中的降解

室内条件下研究了2种毒死蜱制剂有效成分在水中的降解,结果显示当初始设计浓度分别为100.00,10.00,1.00 mg/L时,40%毒死蜱乳油中有效成分在水中的半衰期分别为356.50 d,110.47 d与44.31 d;而48%乐斯本乳油中有效成分的半衰期分别为328.58 d,297.45 d与78.69 d。表明有效成分浓度、助剂种类与数量等影响毒死蜱在水中的降解速度。通过筛选合适的助剂及选择合理的助剂用量可望成为提高农药使用效果和减少农药残留污染的一个途径。

Degradation of Active Ingredient from Two Chlorpyrifos EC Products in Water

Under the indoor condition,the degradation of active ingredients in 2 chlorpyrifos emulsifiable concentration(EC) products in water was studied.The results showed that,when the initical concentrations were designed at 100.00 mg/L,10.00 mg/L and 1.00 mg/L,the degradation half lives of the active ingredient from 40% chlorpyrifos EC was 356.50 d,110.47 d and 44.31 d,respectively.Meanwhile,those of 48% Lorsban EC was 328.58 d,297.45 d and 78.69 d,respectively.This indicated that the concentration of active incredient,the type as well as its amount of adjuvants could affect the degradation rates of chlorpyrifos in water.The role of adjuvants in pesticide use and residue control should be considered.