Cowpea Mosaic Virus DiseaseIdentification & Treatment Guide 2026
Cowpea mosaic virus (CPMV) · Family: Secoviridae
Cowpea mosaic virus (CPMV) causes severe green/yellow mosaic, leaf distortion, and blistering in cowpea, reducing yield 50-80%. Transmitted by leaf beetles (Chrysomelidae). Manage with resistant varieties, seed treatment with insecticide to protect seedlings, controlling beetle vectors, early planting, and using virus-free seed from certified sources.
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highCowpea Mosaic Virus Disease
- Affects
- leavespodsseeds
- Peak Season
- Growing season; beetle vector populations peak mid-season
- Spread Risk
- Moderate
- Spread By
- Chrysomelid beetles (Ootheca mutabilis, Cerotoma trifurcata), seed-borne (1-5%)
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Symptoms: What does Cowpea Mosaic Virus Disease look like?
Visual identification guide — tap each stage for details
Vein clearing and mild mosaic on young leaves
Faint vein clearing followed by light green-yellow mosaic mottling on newly expanding trifoliate leaves.
Severe mosaic, blistering, and leaf distortion
Pronounced green and yellow mosaic with raised blistering (rugosity). Leaves may be severely distorted, reduced in size, and asymmetric. Plants become stunted with short internodes.
Stunted plants with few pods
Severely infected plants are dramatically stunted, producing few and small pods with shriveled seeds. Early-infected plants may be a total yield loss.
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