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Susceptibility Status of Cabbage Butterfly,Pieris brassicae(Linnaeus Pieridae;Lepidoptera)to Different Synthetic Pyrethroids

机译:白菜蝶,鳞翅目对不同合成拟除虫菊酯的敏感性

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摘要

The relative toxicity of emulsions of various pyrethroids was evaluated against the third instar larvae of Pieris brassicae in the laboratory.Except fenvalerate,the synthetic pyrethroids viz,deltamethrin,lambda-cyhalothrin,alphamethrin,bifenthrin,fenpropathrin and p-cyfluthrin were found to be highly toxic,their relative toxicity values being 23.2,14.5,10.5,8.92,7.73 and 6.12 times more compared to cypermethrin.Regardless of the method of application,relative efficacy of various synthetic pyrethroids was the same.A comparison of the relative resistance based on LC_(50)values of Pieris brassicae,Spilarctia obliqua and Spodoptera litura to various synthetic pyrethroids indicated higher susceptibility to P.brassicae amongst these three pests.The base line data thus generated would provide a record for detecting the resistance level of P.brassicae to various synthetic pyrethroids.
机译:在实验室中评估了各种拟除虫菊酯乳剂对菜青虫的三龄幼虫的相对毒性。除氰戊菊酯外,合成拟除虫菊酯viz,溴氰菊酯,lambda-氟氯氰菊酯,α-甲基除草菊酯,联苯菊酯,fenpropathrin和p-cyfluthrin含量很高。相对于氯氰菊酯,它们的相对毒性值分别是氯氰菊酯的23.2、14.5、10.5、8.92、7.73和6.12倍。不论使用哪种方法,各种合成拟除虫菊酯的相对功效都是相同的。菜青虫,斜纹夜蛾和斜纹夜蛾对各种合成拟除虫菊酯的(50)值表明在这三种害虫中对芸苔假单胞菌的敏感性更高,因此产生的基准线数据将为检测芸苔假单胞菌对各种抗药性的水平提供记录。合成拟除虫菊酯。

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