Fumigant toxicity and long term efficacy of some essential oils and their combinations against insect pests of stored grain
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Date
2016-07
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
Experiment were conducted in the Post-Harvest Entomology Laboratory of Department of Entomology, G. B. Pant University of Agriculture & Technology, Pantnagar, to study the fumigant toxicity and long term efficacy of four essential oils and their combination against stored grain insect pests Sitophilus oryzae, Rhizopertha dominica, Tribolium castaneum and Callosobruchus chinensis. Lethal concentration was calculated for each four essential oils at 40, 80, 160, 370 and 750 µL/L (Kim and Ahem, 2001 method) and at 0.09, 0.19, 0.39, 0.78 and 1.56 µl/ cm2 (Tapondjou et al., 2004 method). Result showed that adults of R. dominica and C. chinensis were most susceptible to fumigant action that S. oryzae and T. castaneum. Fumigant toxicity of essential oils was dependent on dose and exposure period. Same combination of essential oils were effective against insect pests of stored cereals for six months
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