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See below Botrytis,

Mostly used abbreviation for Botrytis cinerea (synonym Botryotinia fuckeliana) for in German as gray rot (also gray mold, gray mold, sour rot) or positively occupied as noble mushroom or noble rot mold from the genus Botrytis. It is one of the ascomycetes and spreads vegetatively over the so-called conidia (spore form). Depending on the maturity stage or the affected areas on the vine, it is also called Gescheinsbotrytis, Stielbotrytis or Traubenbotrytis. It was already described in the 18th century and occurs in all temperate climates in the world. Winemaking areas are particularly favorable for infestation geographic and climatic conditions Sauterne (France), Rheingau (Germany), Lake Neusiedl (Austria) and Tokaj (Hungary). There are over 200 host plants known. Particularly affected are bulbs, vegetables, ornamental plants and vines, In young grapes, the infection affects necotrophic (deadly), in older biotrophs (host organism stays alive longer).

Botrytis - early stage of a Riesling grape

At the Rebstock All parts except the trunk and perennial wood are infested, but preferred blossoms (if the fungus occurs at this time) and berries. Because there is a sufficient supply of sugar and nitrogenous compounds. The name gray mold arises from the characteristic gray mushroom lawn, which covers the infested plant parts. In case of heavy grape infestation, it can be observed that a gray cloud consisting of the fungal spores rises when the receptacles are emptied. In viticulture Botrytis is on the one hand feared, on the other hand "at the right time" but also very desirable. With appropriate environmental conditions, the noble rot, which is mainly desired for white wine varieties, is produced. This is partly a prerequisite for noble sweet White wine specialties like outbreak. choice. Beerenauslese and (legally required) Trockenbeerenauslese, The Botrytis wines are due to the high sugar content of the sweet wines, In these...

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