丙溴磷等对棉铃虫不同龄期的作用特点研究作者选择丙溴磷、辛硫磷、久效磷、甲基对硫磷、甲胺磷、硫丹、灭多威、氰戊菊酯等８种杀虫剂，对棉铃虫卵、２龄、３龄、４龄幼虫的作用特点以及时棉蚜、粘虫的毒力进行了研究。对棉蚜触杀毒力由大到小的顺序为灭多威、久效磷、硫... Profenofos and other effects on the different instars of cotton bollworm The study selected profenofos, phoxim, monocrotophos, methyl parathion, methamidophos, endosulfan, methomyl, fenvalerate, etc. Eight kinds of insecticides, the cotton bollworm eggs, the second instar, the third instar and the fourth instar larvae as well as the characteristics of cotton aphid and armyworm toxicity were studied. On the cotton aphid touch virulent descending order of methomyl, monocrotophos, sulfur ...