Harish Kumar Netam and Shivam Soni
Department of Entomology, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.), India
1. Student of M.Sc.(Ag) Department of Entomology
2. Student of M.Sc.(Ag) Department of Genetics and Plant Breeding
*E-mail: harish.netam15@gmail.com
Abstract : A Field experiment will be laid out in randomized block design with six treatments including untreated control replicated four times. This crop will be sown on 4th July 2010 in plot size of 25 square meters. In this experiment numbers of caterpillars will be counted in randomly selected three one meter rows in each plot. Observations will be taken 24 hours before the spraying of insecticides and after 24 hours, 3 days, 7 days, 10 days of spraying of insecticides.
Flubendiamide 480 SC was evaluated for bio-efficacy against lepidopteran pests, S. litura and C. acuta. Flubendiamide 480 SC when applied at the rate of 90 g. a.i./ha was most effective with minimum 1.62 larvae/m row and maximum grain yield of 25.47 q/ha. It was followed by the same insecticide applied @ 72 g.a.i./ha and Triazophos 40 EC with 3.00 and 3.06 larvae per meter row and 23.57 and 21.54 q/ha grain yield. Flubendiamide 480 SC@ 90 g.a.i/ha despite being most effective against the lepidopterous pests was also most economical with 34.82 percent avoidable losses and 1.53:1 benefit cost ratio.
Keywords : Bioefficacy, Flubendiamide , S. litura , C. acuta, soybean lepidopteran pests, triazophos
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