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    Molya disease of wheat and barley is caused by which nematode:
    Question

    Molya disease of wheat and barley is caused by which nematode:

    A.

    Heterodera zeae

    B.

    Heterodera avenae

    C.

    Globodera rostochiensis

    D.

    Heterodera graminicola

    Correct option is B

    The Correct Answer is: (B) Heterodera avenae
    Explanation:
    Molya disease of wheat and barley is caused by the nematode Heterodera avenae, commonly known as the cereal cyst nematode.
    It damages the roots by forming cysts, leading to stunted growth, yellowing, and significant yield reduction. Infected plants often appear in patches across the field.
    Information Booster:
    • Symptoms are most visible during early plant growth stages, where patches of poorly growing plants are noticed.

    • Nematode infestation is favored by light-textured soils and cool climates.

    Additional Information:

    • Heterodera zeae: Causes damage in maize (corn).

    • Globodera rostochiensis: Responsible for potato cyst nematode disease, mainly attacking potato crops.

    • Heterodera graminicola: Affects rice crops (paddy), causing stunting and yellowing.

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