【摘要】 目的研究氯硝柳胺在现场水体及土壤中对螺作用的持效期。方法用浸泡杀螺试验和生物毒性试验进行测试,观察氯硝柳胺在现场水体及土壤中的持效期。结果在现场水体中投放1和2 mg/L 2种浓度的氯硝柳胺7 d后杀螺作用迅速下降,与对照组比较差异无统计学意义(χ2=0.17,χ2=1.33,P>0.05);同时失去对鱼、蚌的毒性作用,死亡率均为0。喷洒在土壤中的氯硝柳胺15 d后,仍有100%的杀螺作用。结论氯硝柳胺在现场水体中降解较快,在土壤中的氯硝柳胺降解速度较慢,15 d内仍可保持原有的药性。更多还原

【Abstract】 Objective To study the effective duration of niclosamide in water and soil.Methods The effective duration of niclosamide in water and soil were measured by the snail immersion method and bioassay.Results When the concentration of the solution is 1 or 2 mg/L in water,the niclosamide had no effect on killing snail in water after 7 days,and no toxic to fish or mussle.There was no statistical difference between those and the control(untreated water)((χ~2=)(0.17),(χ~2=)(1.33),(P>)(0.05)).Niclosamide in soil was still be fully effective after 15 days.Conclusion Niclosamide is easy to dissolve in water.Niclosamide is hard to dissolve in soil.Niclosamide will be still effective in 15 days.更多还原