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The Biobrio 8(1 & 2), 2021

Effect of Neem leaf and Orange peels on granary weevil, Sitophilus granaries (L.) (Coleoptera: Curculionidae) growing on wheat grain

Archana Kumari & Amrendra Kumar Jha


An experiment was conducted at the laboratory of P.G Dept. of Botany J P. University Chapra
Saran. Two plant powder namely Neem leaves and Orange peels (known Insecticide) are tested
to determine the growth of Sitophilus granaries, (Coleoptera: Curculionidae) on wheat grains.
Considering the percentage of mortality, the toxicity of powder's increased gradually with
increasing concentration. The treatments were arranged in CRD (Complex Randomized Design)
with three replications. The dead adult weevils were counted within 8 weeks after the wheat
was treated by Neem leaf powder and Orange peels powder. Three sets of testing were set
including treatment of seeds with two different plant powder extracts such as Orange peels
powder and Neem leaf powder, and a control where no plant powder were applied to the

Keywords:    Neem Leaf, Orange Peel, Sitophilus granaries, Wheat grain

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