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High plains disease (corn)

Area of impact: Leaves

Description: Causes stunted growth, yellowing and a mosaic pattern on leaves. Stunting and yellowing are especially noticeable in young plants. As the disease advances, the mosaic pattern will merge into yellow stripes an inch or more wide that run parallel to the leaf veins.

Pathogen involved: Virus

Timing/Conditions: Spread by the wheat curl mite, a cylindrical cream-colored wingless insect that depends on wind for movement.

Contributing factors: Proximity to wheat foxtail and other grasses that can harbor the mite.

Management practices: Use resistant varieties, plant corn early and control volunteer wheat or other grasses that may host the mite or disease.

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