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Infestation by Botrytis requires warm and humid conditions, typically around 20 degrees Celsius and above 80% humidity. [2] If the weather stays wet, the undesirable form, "bunch rot" or "grey rot", adversely affects winemaking by disrupting fermentation and changing the taste, aroma, and appearance of the final wine [ 1 ] [ 2 ] [ 3 ] Grapes ...
Botrytis cinerea is a necrotrophic fungus that affects many plant species, although its most notable hosts may be wine grapes. In viticulture, it is commonly known as "botrytis bunch rot"; in horticulture, it is usually called "grey mould" or "gray mold". The fungus gives rise to two different kinds of infections on grapes.
The optimum temperature for the disease development has been reported to be 15-20 °C, the first symptom seen after 6 hours of leaf wetness, with the lesion development decreasing with increasing periods of dryness. [7] [8] At temperatures between 9-25 °C, lesion development increases with increasing temperature and leaf wetness. Based on ...
Botrytis is a genus of anamorphic fungi in the family Sclerotiniaceae. Botrytis (also known as grey mold) belongs to the group hyphomycetes and has about 30 different species. It is a plant parasite as well as saprophytes on both agricultural and forest trees.
There are seven different species of Botrytis associated with onions in storage, but the rot induced by B. allii and B. aclada causes the greatest commercial loss. The two can be distinguished microscopically; the conidia of B. allii have a maximum length of 15 μm and mean size of 10.2 × 5.7 μm, while the conidia of B. aclada have a maximum length of 12 μm and mean size of 8.6 × 4.6 μm.
Several other factors, such as moisture and temperature, can affect the population density or dispersion of Botrytis as well. During prolonged dry periods, individuals move down into the soil, while during short dry periods they retreat under logs or rocks.
Temperature Effects on Virus Resistance Temperature significantly affects plant resistance to viruses. For example, plants with the N gene for tobacco develop tolerance to tobacco mosaic virus (TMV) but become systemically infected at temperatures above 28°C.
Botrytis cinerea on Fragaria in the Carolinas, conferred by the G143A mutation in the partial cytochrome b (CYTB) gene. [1] Botrytis cinerea on Fragaria, Rubus idaeus, Vaccinium corymbosum, Ribes rubrum, Ribes uva-crispa, and blackberry (various Rubus spp.) in Northern Germany. [2] Botrytis cinerea on Fragaria in Florida. [3]