选择克百威、丙硫克百威和丁硫克百威3种杀虫剂作为种衣剂有效杀虫成分,每种杀虫剂设置1%、2%、3%、…10%共10种浓度梯度,春天播种期进行玉米包衣播种,20 d后调查苗期植株的根长、根数、叶数和株高,验证3种杀虫剂不同浓度对玉米苗期的生长安全性。结果表明:在10%浓度以下,3种杀虫剂进行种子包衣处理,玉米苗期生长均未产生药害,植株生长正常。 Choose 3 insecticides as carbamazepothrin, carbosulfan and carbosulfan effective seed insecticide as seed coating agent, set at 1%, 2%, 3%, ... 10% for each pesticide The seedlings were sown with corn at the concentration gradient and spring sowing date. The root length, number of roots, leaf number and plant height at seedling stage were investigated 20 days later. The growth safety of the three insecticides at different seedling stages was tested. The results showed that under the concentration of 10%, the three kinds of insecticides were seed-coated, and none of the maize seedlings had any phytotoxicity, and the plants grew normally.