Alternaria Rot of Grapes
Alternaria spp.
Grapefungal
A fungal disease causing dark, dry rot on berries, often at cracks or wounds.
Symptoms
Dark, dry rot developing on berries, often starting near cracks or other wounds.
Favorable conditions
- •Berry cracking or wounding
- •Warm, humid conditions near harvest
Management
- 1Reduce berry cracking and wounds through canopy and irrigation management
- 2Apply fungicide sprays
- 3Manage canopy density for airflow
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