The grapevine disease (bitter rot disease) occurs on vines mainly in the south and east of the USA, Australia and South America, but only sporadically in Europe. Tests have shown that Vitis vinifera varieties are more susceptible than American species. Apple, cherry, peach, strawberry and blueberry fruit are also affected.

It is caused by the asexually reproducing, plant-pathogenic tube fungus "Greeneria uvicola". Ripe grapes (especially overripe berries damaged by bird damage, for example) are attacked on the stems in damp weather. The fungus remains latent until the berries are ripe.
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