To understand and improve the stability of the insecticidal activity of tobacco extract,the 3 rd instar larvae of Malaco......

为了有效、持续地控制舞毒蛾（Lymantria dispar Hnnaeus）、黄褐天幕毛虫（Malacosoma neustria testacea Motschulsky）、分月扇舟蛾（Clos......