New Enroll in RBI Grade B New Batch - Starts on May 21

    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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