Management of Downy Mildew in Onions:-
Symptoms:-
- Violet colour fungus on the surface of leaves or flower stalk, which later becomes pale greenish yellow colour.
- Finally, the leaves or seed stalks collapses.
- The disease is worst in damp condition, late planting and application of higher doses of fertilizer and numerous irrigation.
Control
- Onion bulb used for seed crop should be exposed to sunlight for 12 days to destroy the fungus.
- Spray with Mancozeb + Metalxyl or Carbendazim + Mancozeb @ 400 Gm/Acre at fort night interval.
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