Onion Purple Blotch Disease: Symptoms and Management

Purple blotch is a destructive fungal disease of onion plants that affects leaves and bulbs, leading to poor plant health and yield.

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Leaves: Appear as a white elliptical lesion, later turns black velvety which starts from the tip and spreads towards the base of the leaf.

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Bulbs: It shows symptoms of watery rot and drying of scales leading to loose its market value.

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Management

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High nitrogen levels can make plants more susceptible to purple blotch. Use balanced fertilization.

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Foliar spray of chemical fungicides like Custodia at 300 ml/ Acre or Score at 200 ml/ Acre.

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