Botrytis at first appears as a white growth on the plant but very soon darkens to a gray color. Smoky-gray "dusty" spores form and are spread by the wind or in water. In greenhouses, any activity will result in a release of spores. ... These spores are often found on the outside of seeds.

How does botrytis spread?

How Does Botrytis Spread? When any part of the plant is infected, botrytis spores will spread from the infected area to noninfected areas. Additionally, spores may be spread from plant-to-plant through moisture and air currents of the wind.

How does Botrytis cinerea reproduce?

Botrytis cinerea is the causal agent of gray mold diseases in a range of dicotyledonous plant species. The fungus can reproduce asexually by forming macroconidia for dispersal and sclerotia for survival; the latter also participate in sexual reproduction by bearing the apothecia after fertilization by microconidia.