Effectiveness of three pesticides onMegabruchidius dorsalis (Fahraeus) (Coleoptera:Bruchinae)
Author of the article:LI You1** ,ZHANG Run-Zhi1, 2 , GUO Jian-Jun1*** ,QIN Meng3,ZHAO Shou-Qi3 , CHEN Xiao-Long3
Author's Workplace：(1. The Provincial Key Laboratory for Agricultural Pest Management of Mountainous Region; Institute of Entomology,Guizhou University, Guiyang 550025, China; 2. Institute of Zoology, Key Laboratory ofZoological Systematics and Evolution, Chinese Academy ofSciences, Beijing 100101, China.3. National Agriculture Technical Extension and ServiceCenter,Beijing100026,China)
Key Words：Key words Megabruchidius dorsalis, chlorfluazuron, chlorpyrifos, methomyl, mortality rate
Abstract： [Objectives] In order to determine the effective pesticide to control Megabruchidius dorsalis (Fahraeus). [Methods] Three pesticides, chlorfluazuron, chlorpyrifos and methomyl, were applied to adults, newly hatched larvae and eggs of M. dorsalis at field-recommended concentrations. [Results] Chlorfluazuron, chlorpyrifos and methomyl killed larvae effectively with mortality rates of 96.59%, 100.00% and 100.00%, respectively after 72 h. Chlorpyrifos and methomyl killed 100.00% and 94.38% of adults after 72 h. Chlorfluazuron was not effective with respect to eggs and adults. [Conclusion] Field-recommended concentrations of methomyl is the most toxic insecticide to M. dorsalis.