Consult the label for dosage rates, safety precautions, and directions for use. Gray mold , Botrytis cinerea. This fungus occurs everywhere and commonly infects senescing or damaged plant parts such as old flowers, causing a fuzzy gray mold which is easily blown around. From these tissues it moves into healthy stems and leaves, causing a damaging blight. Disease is favored by cool wet conditions and the presence of overripe fruit or old flower petals.
Sanitation is the most important means of control.
Remove dead flowers before gray mold develops. If disease has moved into leaf or stem parts, fungicides may be applied to the plants. Among the compounds registered for use in Connecticut is thiophanate-methyl. Consult the label for dosage rates and safety information. Leaf spots and blights , Alternaria, Kabatiella, Colletotrichum or Cercospora spp.