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Botrytis

Mostly used short name for Botrytis cinerea (synonym Botryotinia fuckeliana) for the mould fungus from the genus Botrytis which is called grey mould rot (also grey rot, grey mould, sour rot) or positively occupied as noble fungus or noble rot. It belongs to the tubular fungi and spreads vegetatively via the so-called conidia (spore form). Depending on the stage of ripeness or the infested areas on the vine, it is also known as botrytis, stem botrytis or grape botrytis. It was already described in the 18th century and occurs in all temperate climate zones of the world. Wine-growing areas with geographical and climatic conditions that are particularly favourable for the infestation are Sauternes (France), Rheingau (Germany), Lake Neusiedl (Austria) and Tokaj (Hungary). Over 200 host plants are known. Particularly affected are flower bulbs, vegetables, ornamental plants and vines. In young grapes the infestation has a necotrophic (lethal) effect, in older biotrophic (host organism stays alive longer).

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