Gray mold (Botrytis blight) is an infectious plant disease caused by fungi from the genus Botrytis (usually Botrytis cinerea), primarily infecting flowers and buds. A distinctive symptom of gray mold is brown soft spots covered with a dusty mold.
Avoid prolonged wetting of the leaves, which can be caused e.g. by overhead irrigation.
Improve the air circulation around the plant (e.g. by pruning excess foliage or increasing the spacing between plants).
Remove and destroy all dead or dying plant tissue - it may reduce the infection next year. Burn it, toss it into the garbage, or bury it deeply. Do not compost.
Disinfect tools, infected flower pots, and hands to avoid disease transmission.
If possible remove and destroy the infected and dead parts of the plant. Burn it, toss it into the garbage, or bury it deeply. Do not compost.
