Formerly International Journal of Basic and Applied Agricultural Research

Long term efficacy of seven essential oils against Sitophilus oryzae (Linnaeus), Rhizopertha dominica (Fabricius) and Tribolium castaneum (Herbst)

Pantnagar Journal of Research, Volume - 20, Issue - 2 ( May-August 2022)

Published: 2022-08-31

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Experiments were conducted to study the long-term bio-efficacy and fumigant toxicity of seven plants essential oils extracted from Mentha cardiaca, Tanacetum cinerariifolium, Ocimum basilicum, Lippia alba, Ferula assa-foetida, Salvia officinalis and Lavandula angustifolia against Rhyzopertha dominica (Fabricius), Sitophilus oryzae (Linnaeus) and Tribolium castaneum (Herbst.) at 0.1, 0.2, 0.3, and 0.4 per cent (v/w) concentration. The essential oils of M. cardiaca and O. basilicum completely checked the progeny production of S. oryzae for 180 days at all four concentrations in both the preliminary as well as confirmatory tests while such pronounced effect was exhibited by T. cinerariifolium at 0.2-0.4 per cent; L. angustifolia at 0.3-0.4 per cent and L. alba at 0.4 per cent only. In case of R. dominica, the oils of M. cardiaca, T. cinerariifolium, O. basilicum and F. assa-foetida completely checked the F1 progeny for 228 days in preliminary and 220 days in confirmatory test at all four concentrations while complete inhibition was achieved by L. angustifolia at 0.2-0.4 per cent and L. alba and S. officinalis at 0.3- 0.4 per cent. The essential oil of O. basilicum completely checked the reproduction of T. castaneum at 0.1-0.4 per cent for 90 days while such high efficacy was shown by M. cardiaca at 0.2-0.4 per cent and T. cinerariifolium and L. angustifolia at 0.4 per cent. The study revealed that essential oils are highly effective against all the major insect pests of stored grains and they can be used for preventing the post-harvest infestation of stored grains

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