Onion diseases

Downy mildew in onions

Stay alert for downy mildew

Downy mildew can be a devastating disease in the absence of a robust fungicide programme. Early, forward crops and warm weather conditions are conducive for downy mildew development. Start fungicides early – when crops reach 4 to 5 leaves. Use crop growth stage rather than date for starting applications. Keep intervals tight, 7 days is ideal for protecting new growth. Including a range of active ingredients with different modes of action ensures cleaner crops.