Yellow Mosaic Virus Control — How to Identify & Manage YMV in Soybean & Mungbean
Yellow Mosaic Virus (YMV) is a devastating whitefly-transmitted virus that causes mosaic yellowing, stunting, and near-total yield loss in soybean, mungbean, urad, and blackgram. There is no cure — all management focuses on controlling the whitefly vector and planting resistant varieties.
How to identify yellow mosaic virus
Watch for these signs in your field.
Yellow-green mosaic pattern on young leaves
Young expanding leaves develop a characteristic yellow-green mosaic or mottled pattern — alternating patches of bright yellow and normal green tissue — caused by virus disrupting chlorophyll production.
Stunted plant and distorted pods
Infected plants are severely stunted compared to healthy plants in the same row. Pods are few, small, distorted, and may fail to fill properly, leading to near-zero yield in severe cases.
Early infection leads to complete yield loss
Plants infected before flowering produce no harvestable pods. The whitefly vector can be seen on the undersides of young leaves — controlling the vector is the only way to limit spread.
How to control yellow mosaic virus
Follow this step-by-step protocol for best results.
Control the whitefly vector immediately
Yellow Mosaic Virus (YMV) is transmitted by whitefly (Bemisia tabaci). Apply Imidacloprid 17.8% SL (0.3 ml/L) or Thiamethoxam 25% WG (0.3 g/L) at first detection of whitefly to stop virus transmission. There is no cure once a plant is infected — all control is vector management.
Based on agronomist consults handled through Farmkart in Kharif 2024, over 70% of YMV outbreaks reported in soybean and mungbean fields in MP and Vidarbha occurred in fields where whitefly control was delayed beyond 7 days of first detection. Speed of vector response is the single most critical management factor — our agronomists consistently recommend treating within 3–4 days of spotting even low whitefly counts (5 or more adults per plant) during the first 30 days after sowing.
Remove infected plants and use mineral oil
Rogue out and destroy all infected plants immediately upon identification — do not leave them in the field as they are a continuous virus source for whitefly to acquire and spread. Apply mineral oil (Neem oil 5 ml/L or white mineral oil) as a spray to reduce whitefly feeding and virus acquisition from infected plants.
Use certified seed and resistant varieties
Use only virus-free certified seed from a reliable source. Plant YMV-resistant varieties where available — for soybean, varieties like JS 95-60 and MACS 450; for mungbean, Pusa Vishal and Samrat show good field tolerance. Install yellow sticky traps at 10 per acre for early whitefly monitoring.
Which crops are at risk?
Tap a crop for the full pest management guide.
Yellow Mosaic Virus — Common Questions
Is there a cure for Yellow Mosaic Virus once a plant is infected?
No. There is currently no curative treatment for Yellow Mosaic Virus in the field. Once a plant shows mosaic symptoms, it will remain infected and be a continuous source of virus for whitefly to transmit to healthy plants. The only management strategy is to remove infected plants immediately, control the whitefly vector, and protect healthy plants from new infections.
Which varieties of soybean and mungbean are resistant to Yellow Mosaic Virus?
For soybean, JS 95-60, MACS 450, and MAUS 81 show good tolerance to YMV in field conditions. For mungbean, Pusa Vishal, Samrat, and Meha are recommended resistant varieties. Check with your state agriculture department or KVK for the latest recommended varieties for your agro-climatic zone, as virus strains vary by region.
How does Yellow Mosaic Virus management differ between soybean and mungbean?
In soybean, YMV management focuses on planting resistant varieties and controlling whitefly from emergence. In mungbean, the disease can spread extremely rapidly — a single infected plant can be the source for an entire field within days in hot, dry weather. Rogue infected plants weekly from emergence onwards. In both crops, early season whitefly control with a systemic neonicotinoid (Imidacloprid) is critical in the first 30 days after sowing.
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