Fungi that have a powdery or woolly appearance. Botrytis thrives in moist conditions and is often seen on dropped flower petals or overripe fruit. Look for a thick gray mold or water-soaked spots on petals, leaves, or stems. It first infects dead or dying tissue, so removing faded flowers and blighted buds or shoots to control the problem. Peonies, tulips, and lilies can be particularly sensitive in wet weather. Remove and compost infected material. Space, prune, and support plants to encourage good air movement. Spray plants with Garrett Juice plus potassium bicarbonate.