What is Botrytis:
There are over 50 different pathogenic species of Botrytis. In horticulture, Botrytis cinerea is the most common and has the largest host range. Botrytis cinerea (Botrytis from Ancient Greek meaning “grapes” plus the Neo-Latin suffix –itis for disease) is a necrotrophic fungus that affects many plant species.
Its common names include gray or brown mold, bacterial soft rot, blossom blight, leaf blight, stem canker, crown rot, and damping off or seedling blight. Botrytis is estimated to cause more economic loss in ornamentals than any other disease.
It affects a wide range of plants, including ornamentals, fruits and vegetables. Especially susceptible are wine grapes, strawberries, and flowers with thick succulent petals, such as begonias, peonies and geraniums. It also commonly affects African violets, dahlias, pansies, snapdragons, zinnias, chrysanthemums and many others.