GRBD is a vector-transmitted viral disease of grapevine disease that affects pH, sugar and phenolic accumulation (Blanco-Ulate et al. 2017; Girardello et al. 2019) & ultimately reduces wine quality. Grapevine red blotch virus (GRBV) is the causal agent of Red blotch disease (GRBD).
- Distinguish visual symptoms of grapevine red blotch disease from other vineyard disorders. (PDF 42.18 MB)
- Understand grapevine red blotch disease ecology in English (PDF 7.46 MB) and Spanish (PDF 7.28 MB).
- Learn about important aspects of the disease and its management in Spanish. (PDF 2.06 MB)
- Distinguish between two California treehopper species (PDF 2.82 MB)
- Identify (PDF 374.40 KB) and monitor (PDF 471.89 KB) treehopper girdles in vineyards.
- Understand treehopper girdle trends (PDF 980.65 KB)
- Review the financial considerations for red blotch disease management. (PDF 542.96 KB)
- Understand the challenges of decision-making for grapevine viral diseases. (PDF 530.45 KB)