增效水胺硫磷的降解及在水稻上的残留特性

The Study about Decomposition and Residueof SV1-Isocarbophos on Rice

增效水胺硫磷在模拟条件下，在不同ｐＨ值的缓冲溶液、光和不同ｐＮ值的土壤中降解较快，半衰期两天左右；自然条件下，在稻株上的半衰期０．３天，在水中的半衰期为０．４～０．６天，在土中的半衰期为３天。在常用量情况下，制剂（４０％增效水胺硫磷乳油），每公顷２２５０毫升，用药３次，最后一次用药距收获期２５天，在稻米中没有残留。

In simulated test,the decomposition rate of svl-iso-carbophos is very quick in buffer solution and soil with varying pH. Its half-life is about 2 days. In natural environment,its half-life is 0.3 day on rice plant,0.4 to 0.6 day in water,3davs in soil.There is no resdue of svl-iso-carbophos,when the rice were treated with three applications at 2250 ml(40%preparation)ha/application and lapsed day is 25 days.