3种农药及其复配剂对日本鹌鹑的急性毒性比较

The Toxicity of Three Pesticides of Mefenoxam,Thiamethoxam,Fludioxonil and Their Compounds to Coturnix coturnix japonica

采用"经口灌胃法"测定了3种农药及其复配剂对鹌鹑的24 h、48 h、72 h和168 h急性毒性,根据我国《化学农药环境安全评价实验准则》中对鸟类的急性经口毒性划分的规定,3种农药及其复配剂对鹌鹑的毒性等级如下:35%精甲霜灵悬浮种衣剂对鸟类的24 h、48 h、72 h和168 h-LD_(50)均大于500 a.i.mg·kg^(-1)bw(以单位体重计),属"低毒"级,25 g·L^(-1)咯菌腈悬浮种衣剂对鸟类的24 h、48 h、72 h和168 h-LD_(50)也均大于500 a.i.mg·kg^(-1)bw,属"低毒"级,25%噻虫嗪水分散粒剂对鸟类的24 h、48 h、72 h和168 h-LD_(50)分别是695 mg·kg^(-1)bw、587 mg·kg^(-1)bw、502 mg·kg^(-1)bw、502 mg·kg^(-1)bw,属于"低毒"级;25%噻虫嗪·咯菌腈·精甲霜灵悬浮种衣剂对鸟类的24 h、48 h、72 h和168 h-LD_(50)分别是754 mg·kg^(-1)bw、504 mg·kg^(-1)bw、504 mg·kg^(-1)bw、504mg·kg^(-1)bw,也属于"低毒"级。

Coturnix coturnix japonica were orally given with three pesticides and their compounds to determine their 24 h, 48 h, 72 h and 168 h-LD50 values. And according to acute oral toxicity grading standards for birds in China, the 24 h, 48 h, 72 h and 168 h-LDs0 values of mefenoxam seed coating agent are all above 500 a.i.mg.kg-1 （bw） so it is of low toxicity. The 24 h, 48 h, 72 h and 168 h-LD50 values of fludioxonil seed coating agent are all above 500 a.i.mg, kgl（bw） so it is of low toxicity. Thiamethoxam water dispersible granules is of low toxicity be- cause its 24 h, 48 h, 72 h and 168 h-LDs0 values are 695 mg.kg-1（bw）, 587 mg.kg-1（bw）, 502 mg.kg-1（bw）, 502 mg-kg-1（bw）. Thiamethoxam-fludioxonil-mefenoxam seed coating agent is also of low toxicity because its 24 h, 48 h, 72 h and 168 h-LDso values are 754 mg.kg-1（bw）, 504 mg.kg-1（bw）, 504 mg.kg-1（bw） and 504 mg.kg-1（bw）.