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Grape - Anthracnose ROP

Roots of Peace: Kenneth R. Tourjee Anthracnose in the Vineyard Disease Cycle and Epidemiology Anthracnose of grape is caused by the fungus Elsinoe ampelina, which originated in Europe. This fungus overwinters in vineyards as sclerotia (fungal survival structures) on infected shoots. Therefore, pruning out and removing infected canes during the dormant season (sanitation) is an important cultural practice for control. The fungus can also over-winter on infected berries left on the vine or on the vineyard floor. In the spring, sclerotia on infected shoots germinate to produce abundant spores (conidia) when they are wet for 24 hours or more and the temperature is between 2°C and 32°C. The infective spores are spread by splashing rain; the wind is not an important factor for the dissemination of conidia. As little as 2 mm of rain can disseminate the spores to susceptible green tissue, where they germinate to cause primary infections when free water is present for at least 12 hours.....

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