Black Gram Yellow Mosaic: Mungbean Yellow Mosaic Virus
Symptom:
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The disease is more prevalent on black gram than a green gram.
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Initially, mild scattered yellow spots appear on young leaves.
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The next trifoliate leaves emerging from the growing apex show irregular yellow and green patches alternating with each other.
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Spots gradually increase in size and ultimately some leaves turn completely yellow.
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Infected leaves also show necrotic symptoms.
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Diseased plants are stunted, mature late and produce very few flowers and pods.
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Pods of infected plants are reduced in size and turn yellow in colour.
Management:
- Growing resistant varieties such as VBN 4, VBN 6 and VBN 7
- Seed treatment with Dimethoate (or) Imidacloprid @ 5 ml /kg
- Installation of yellow sticky traps 12 nos/ha
- Rogue out the infected plants up to 45 days
- Foliar spray of notchi leaf extract 10% at 30 DAS or neem formulation 3 ml/lit
- Spray methyl demeton 25 EC 500 ml/ha or dimethoate 30 EC 500 ml/ha or thiamethoxam 75 WS 1g /3 lit and repeat after 15 days, if necessary.
Source-
- TamilNadu Agritech Portal
