R(-)-glycerol monolinolate, a minor sporogenic substance of Sclerotinia fructicola.

Sclerotinia fructicola, a pathogenic brown rot fungus of stone fruits, produced abundant arthrospores when grown in darkness, whereas poorly or not at all under illumination of light.')Quite recently, we have iso lated a sporogenic substance from this fungus cultured in darkness, and showed that this active compound,