Mitosporic fungus. Hyphomycetes. Teleomorph (sexual state): Botryotinia (Ascomycete).
Primarily in temperate and subtropical regions.
Approx. 30 species.
Soil, stored and transported fruit and vegetables. Plant pathogen and saprophyte on flowers, leaves, stems, fruit. Leaf rot on grapes, strawberries, lettuce, cabbage, onions.
Also liberated by rain splash.
May be found in conjunction with indoor plants.
Aw=0.93-0.95 (minimum for various species).
Mostly parasitic on higher plants.
"Gray-mold," called "noble rot" on wine grapes.
Type I allergies (hay fever, asthma).
Type III hypersensitivity pneumonitis: Winegrower's lung.
Very rare agent of keratomycosis. No recorded human cases of infection.
Grows well on all general fungal media. Colony spreads easily over the surface of the petri dish. May form black sclerotia.
Fairly distinctive, frequently with a visible inner cell wall, and an attachment point at one end. Spores are slightly pigmented.
Distinctive, especially if spore bearing structures are present.