Germination of Botrytis and Sclerotinia spores in the presence of pollen on tobacco leaves

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Abstract
Most conidia of Botrytis cinerea Pers. ex Fr. and 50% of the ascospores of Sclerotinia sclerotiorum de Bary, placed on discs cut from tobacco leaves, germinated in the presence of pollen; relatively few spores germinated wilhout pollen. There was greater mycelial development when pollen was present. Spore germination was also influenced by the age of the leaves from which discs were cut.