What diseases are common in North India in monsoon?

North India's monsoon (July–September) triggers powdery mildew on cucurbits, late blight on tomatoes, downy mildew on spinach, and root rot in waterlogged pots. High humidity above 80% combined with temperatures of 25–35°C creates ideal fungal conditions. Apply preventive copper fungicide in late June before rains intensify in Lucknow, Delhi, and Kanpur regions.