Bajra
Downy Mildew (Green Ear) in Bajra: Symptoms & Control
Identify and control downy mildew — the green ear disease of bajra (pearl millet). Learn the symptoms, why it spreads, and a practical management plan using resistant hybrids, seed treatment and field hygiene.
Updated Wed Jun 03
Downy mildew — known to farmers as green ear — is the single most damaging disease of bajra. A badly affected field can lose much of its grain, because diseased plants grow leafy green earheads instead of filling grain. The good news: it is very manageable with a few well-timed, low-cost steps.
How to recognise it
Watch for these signs:
- Leaves show pale yellow or light-green streaks on the upper surface, with a white-to-grey downy growth on the underside (most visible in the cool, humid morning).
- Stunting — infected plants are shorter and weaker than healthy neighbours.
- Green ear — the giveaway symptom. The earhead, instead of forming grain, turns into a tangle of small green leafy shoots. These plants are effectively barren.
Why it spreads
The pathogen survives in infected crop debris and soil, and partly on the seed. It spreads fastest in cool, humid, overcast weather and on poorly drained, waterlogged fields. Continuous bajra on the same land builds up the disease year after year.
A practical control plan
No single step is enough — stack them:
- Start with a resistant hybrid. Genetic resistance is the cheapest, most reliable defence. A vigorous hybrid such as Mansi gives you a strong, uniform stand to build on.
- Treat the seed. Treat with a recommended systemic fungicide (metalaxyl-based products are standard for this disease) before sowing. This protects the seedling through its most vulnerable stage.
- Rogue early. Walk the field and pull out infected plants as soon as you spot the green-ear symptom — before they shed spores. Carry them out and destroy them; don't drop them in the field.
- Drain and space well. Avoid waterlogging, and don't sow over-thick — good airflow between plants lowers humidity around the leaves. See the bajra cultivation guide for spacing and thinning.
- Rotate crops. Break the cycle by not growing bajra on the same field every season; rotate with a non-host crop to starve the soil-borne inoculum.
Bottom line
Downy mildew is preventable, not curable — once a plant shows green ear it won't recover. The win comes from prevention: a resistant hybrid plus treated seed plus clean, well-drained fields. Do that and green ear stops being a threat.
For variety choice see best hybrid bajra seeds, and for full agronomy the bajra farming guide. Quality bajra seed is available from Varsha Seeds in Modasa, Gujarat.
Frequently Asked Questions
What is green ear disease in bajra?+
Green ear is the symptom of downy mildew, the most damaging disease of bajra. The earhead turns into a mass of leafy green structures instead of grain, so affected plants produce little or no grain.
How do I control downy mildew in bajra?+
Use a resistant hybrid, treat seed with a recommended systemic fungicide (such as metalaxyl-based products) before sowing, rogue out and destroy infected plants early, and rotate crops. Avoid waterlogged, poorly drained fields.
Does seed treatment really help against downy mildew?+
Yes. Because the pathogen is partly seed- and soil-borne, treating seed with a systemic fungicide before sowing is one of the most cost-effective protections, especially when combined with a resistant hybrid.
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