Plant Disease
High SeverityAffects: Maize · Year-round in warm climates; higher incidence during dry seasons when thrips populations peak
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Maize Chlorotic Mottle Virus (MCMV) + Wheat Streak Mosaic Virus or other potyviruses — complex interaction
Severe chlorosis (yellowing) starting from leaf edges and moving inward. Necrosis of all leaves, including husks. Complete plant death before grain fill. Cobs are empty or poorly filled.
Use MLN-resistant varieties (available from seed companies in affected regions). Control thrips and aphids (virus vectors) with insecticides. Remove and destroy infected plants early. Crop-free periods between maize seasons in endemic areas.
No chemical cure for virus diseases. Focus on vector control with thiamethoxam or imidacloprid seed treatment + foliar sprays. Immediate removal of infected plants is critical.
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