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Status of OP and Pyrethroid Resistance in Spodoptera litura(Fab.)on Cotton

机译:棉花斜纹夜蛾(OP。)对OP和拟除虫菊酯的抗性状况

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摘要

Experiments were conducted during kharif,2005 to study the status of OP and pyrethroid resistance in Spodoptera litura(Fab.)on cotton in Guntur and Prakasam districts of Andhra Pradesh.In addition to the relative resistance,resistance levels were worked out in comparison with baseline data.Very high levels of resistance was shown by S.litura to pyrethroids than to OP insecticides where the Guntur strain of S.litura has developed 557.9,728.5,86.9,22.8 folds resistance at LD_(50)/LC_(50)level and 472.3,453.8,121.3,11.3 and 32.2 folds resistance at LD_(90)/LC_(90)level,respectively,to cypermethrin,deltamethrin,chlorpyriphos,quinalphos and triazophos.While the Prakasam strain has recorded 174.3,416.4,130.7 and 13.6 folds at LD_(50)/LC_(50)and 412.2,362.5,173.0,8.8 and 28.5 folds resistance at LD_(90)/LC_(90),respectively.
机译:在2005年的Kharif期间进行了试验,以研究安得拉邦Guntur和Prakasam地区棉上斜纹夜蛾(OP)和拟除虫菊酯抗药性的状况。除相对抗药性外,还计算了抗药性水平与基线的比较与拟除虫菊酯类农药相比,对拟除虫菊酯类农药的抗药性非常高,而对立杀虫剂的Guntur菌株在LD_(50)/ LC_(50)的抗药性为557.9、728.5、86.9、22.8倍。在LD_(90)/ LC_(90)浓度下,对氯氰菊酯,溴氰菊酯,毒死ri,喹al磷和三唑磷的抗性分别为472.3、453.8、121.3、11.3和32.2倍。尽管Prakasam菌株的抗药性记录为174.3、416.4、130.7和13.6倍分别位于LD_(50)/ LC_(50)和LD_(90)/ LC_(90)的412.2、362.5、173.0、8.8和28.5倍阻力。

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