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    Question

    Insect pests whose grubs bore into the grain to feed on

    them, heavy infestation of those pests results in powdery mass of grain while adult scrap surface of grain.
    A Lesser grain borer Correct Answer Incorrect Answer
    B Khapra beetle Correct Answer Incorrect Answer
    C Angoumois grain moth Correct Answer Incorrect Answer
    D Saw tooth beetle Correct Answer Incorrect Answer
    E Red flour beetle Correct Answer Incorrect Answer

    Solution

    Lesser grain borer/Hooded grain borer/paddy borer beetle: Rhyzopertha dominica Host range: Paddy, rice, wheat, maize.  Symptoms of damage • Grubs and adults cause damage and are voracious feeders. • Adults reduce the grain kernels to mere frass. • Grubs eat their way into the grain or feed on the grain dust and are capable of attacking grain externally.

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