Gray Mold (Botrytis cinerea) of Grapes
Botrytis cinerea
Grapefungal
A humidity-driven fungal disease that engulfs grape clusters in gray mold, especially after rain near harvest.
Symptoms
Gray, fuzzy fungal growth engulfing clusters, especially after rain close to harvest.
Favorable conditions
- •Rain and high humidity near harvest
- •Dense canopy limiting airflow around clusters
Management
- 1Manage the canopy for good airflow
- 2Apply fungicide sprays at bloom, veraison, and pre-harvest
- 3Remove infected clusters promptly
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