Botryotinia is a genus of ascomycete fungi causing several plant diseases. The anamorphs of Botryotinia are mostly included in the imperfect fungi genus Botrytis. The genus contains 22 species and one hybrid. Botryotinia fuckeliana (or its anamorph Botrytis cinerea) is an important species for wine industry as well as horticulture. Other economically important species include Botryotinia convoluta (the type species of the genus), Botryotinia polyblastis, Botrytis allii and Botrytis fabae. Botrytis tulipae is a serious pest of tulip crops and Botrytis narcissicola the bulbs of Narcissus.