The gray colour originates from asexual spores (conidiospores) which can be spread by water or wind. Botrytis molds mostly occur in the asexual (anamorph) forms, but sexual (teleomorph) forms have also been described. Most Botrytis species are plant parasites, but some of its species are saprophytes.

What is Botrytis caused by?

Botrytis blight on plants is caused by Botrytis cinerea, a fungus that attacks tender parts of the plant in the presence of high humidity. Botrytis blight symptoms on flowers include spotting, discoloration, and wilting. Buds often fail to open.

How does Botrytis start?

The life cycle of Botrytis fungi starts with the production of vast amounts of asexual spores (conidia) from the tips of fungi's conidiophores. The spores start to germinate when they land on the surface of the host plant. This is also dependent on such factors as temperature, moisture and sunlight among others.