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Efficacy of New Formulations of?Bacillus thuringiensis?Var.?Kurstaki?(HD-1) against?Helicoverpa armigera?(Hubner)

机译:苏云金芽孢杆菌新品种Vur.Kurstaki(HD-1)新配方对棉铃虫的功效

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Bioassays were conducted under laboratory conditions at Division of Entomology, Indian Agricultural Research Institute, New Delhi during 2008, to access the efficacy of new weattable powder (WP) formulations of?Bacillus thuringiensis?var.?kurstaki?(HD-1) against IIIrd?instar larvae of?Helicoverpa armigera?(Hubner). Sixteen new WP formulations of?B. thuringiensis?var.?kurstaki?(HD-1) were developed and relative efficacy was calculated in the basis of LC50 values. The results revealed that LC50 values of recipe-2 (0.032%), recipe-7 (0.018%), recipe-9 (0.030) and recipe-15 (0.015%) were highly effective against IIIrd?instar larvae of?H. armigera?in comparison to Dipel? 8L (0.037%) and Biolep? (0.046%), a commercial formulation of?B. thuringiensis?var.?kurstaki. On the basis of laboratpry performance, recipe-7 and recipe-15 were selected for field efficacy against?H. armigera?in pigeonpea crop. Recipe-15 was found significantly more effective than the Dipel?8L under the conditions.
机译:在2008年期间,在新德里印度农业研究所昆虫学系的实验室条件下进行了生物测定,以获取苏云金芽孢杆菌,库尔斯塔克变种(HD-1)的新可编织粉剂(WP)制剂对抗IIIrd的功效。棉铃虫(Helicoverpa armigera)的幼龄幼虫(Hubner)。 B的16种新WP配方。开发了苏云金芽孢杆菌变种kurstaki(HD-1),并根据LC50值计算了相对功效。结果显示,配方2(0.032%),配方7(0.018%),配方9(0.030)和配方15(0.015%)的LC50值对?H的第三龄幼虫非常有效。与Dipel相比,armigera? 8升(0.037%)和Biolep? (0.046%),B的商业制剂。苏云金芽孢杆菌变种。根据实验室的表现,选择配方7和配方15来对抗?H。 armigera?在木豆作物中。在该条件下,配方15被发现比Dipel?8L更有效。

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