Purwar J P, Sachan G C
Department of Entomology, College of Agriculture, G.B. Pant University of Agriculture and Technology, Pantnagar 263145, Uttaranchal, India.
Microbiol Res. 2006;161(1):38-42. doi: 10.1016/j.micres.2005.04.006. Epub 2005 Jul 26.
A number of fungal parasites infect a wide range of insects and cause epizootics from time to time. Beauveria bassiana (Balsamo) Vuillemin and Metarhizium anisopliae (Metschnikoff) Sorokin are two of the major disease-causing fungi in insects. Investigations were carried out to study the effect of these fungi on the toxicity of endosulfan, imidacloprid, lufenuron, diflubenzuron, dimethoate and oxydemeton methyl against 10-11 days old larvae of Spilarctia obliqua (Walker). For some products the combination treatments showed higher dose mortality response than the sole treatment of fungal conidia or the insecticide. The combination of insecticides with B. bassiana showed 1.26-35.8 fold increase in toxicity of insecticides over sole treatment, while the increase was 1.05-72.0 fold in case of M. anisopliae. Imidacloprid 17.8 SL and oxydemeton methyl 25EC may be used in combination with these fungi for management of S. obliqua.
许多真菌寄生虫会感染多种昆虫，并时不时引发流行病。白僵菌（Beauveria bassiana (Balsamo) Vuillemin）和绿僵菌（Metarhizium anisopliae (Metschnikoff) Sorokin）是昆虫中两种主要的致病真菌。开展了相关研究，以探究这些真菌对硫丹、吡虫啉、虱螨脲、除虫脲、乐果和氧乐果对斜纹夜蛾（Spilarctia obliqua (Walker)）10 - 11日龄幼虫的毒性的影响。对于某些产品，联合处理显示出比单独使用真菌分生孢子或杀虫剂处理更高的剂量死亡率响应。杀虫剂与白僵菌联合使用时，杀虫剂的毒性比单独处理提高了1.26 - 35.8倍，而与绿僵菌联合使用时，提高幅度为1.05 - 72.0倍。17.8%吡虫啉悬浮剂和25%氧乐果乳油可与这些真菌联合用于斜纹夜蛾的防治。
