Presented by Naidu Rayapati, Associate Professor (Virology), Department of Plant Pathology, Irrigated Agriculture, Research and Extension Center at Washington State University in Prosser, WA 99350. Contact: naidu.rayapati@wsu.edu.
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![A grape leaf with blotchy red discoloration in front of other leaves with the same coloration.](https://www.washingtonwine.org/wp-content/uploads/2021/05/GrapevineVirus-scaled.jpeg)