Vineyard leafhoppers: Learn to identify (PDF 1.9 MB) vineyard leafhoppers and manage (PDF 1.9 MB) leafhopper populations in organic vineyards. 

Reducing Argentine ant populations is a key aspect of an integrated program for sap-feeding insects, including mealybugs. Tending ants interfere with biocontrol organisms, reducing parasitism rates in heavily ant-tended vineyards. Monitor vineyards (PDF 844.13 KB) for sugar-feeding ants and prepare gelatinous (PDF 540.94 KB) or agar-based (PDF 958.31 KB) baits targeting ant colonies to increase biological control. 

Pierce's disease is a vector-transmitted bacterial disease of grapevine. Important concepts of disease ecology (PDF 566.25 KB) inform management. Identify vectors of Xylella fastidiosa (PDF 1.03 MB) (sharpshooters and spittlebugs) in North Coast vineyards, and learn more about sharpshooter identification and biology (in English (PDF 1.03 MB) and in Spanish (PDF 1.05 MB)). 

Grapevine red blotch disease is a vector-transmitted viral disease of grapevine. Distinguish visual symptoms (PDF 42.18 MB) of grapevine red blotch disease from other vineyard disorders. Understand grapevine red blotch disease ecology (in English (PDF 7.46 MB) and Spanish (PDF 7.28 MB) ), important aspects of the disease and its management (in Spanish (PDF 2.06 MB)) and patterns of distribution, using adaptive cluster sampling (PDF 563.29 KB). Review the financial considerations (PDF 542.96 KB) for red blotch disease management. Identify (PDF 374.40 KB) and monitor (PDF 471.89 KB) treehopper girdles in vineyards. Understand the challenges of decision-making (PDF 530.45 KB) for grapevine viral diseases. 

Interested in the LAMP assay to detect GRBV? Access the materials and supplies cost sheet (PDF 334.47 KB) (version 3, 2025). Follow step-by-step instructions (PDF 1.15 MB) to order LAMP-GRBV primers (XLXS 12.4 KB). Collect trunk samples (PDF 789.89 KB) for the LAMP-GRBV assay. See FAQs (PDF 368.29 KB) about the LAMP-GRBV Assay.

Neighborhood groups (PDF 429.81 KB) bring industry professionals together to discuss difficult issues and engage in collective action. Interested in coordinating a group? Gain tips and a detailed understanding (PDF 520.5 KB) of the commitment, responsibilities, and rewards of group coordination, and learn from the experiences of other coordinators. 

Observations of field symptoms suggest that the Mystery disease (PDF 529.6 KB) expressed in the Napa Valley is similar to yellow speckle disease common to Australia. Two viroids, grapevine yellow speckle-1 and-2 (GYSVd-1 & GYSVd-2), have been reported as agents inducing yellow speckle. Analyses of samples collected in Napa Valley detected GYSVd-1 in every vine from field sources of the "mystery disease".  Studies indicate that the causal agent of yellow speckle can be present in non-symptomatic field grown vines. Yellow speckle and vein-banding disease expression therefore, appear to be related to a stress complex of biotic, climatic, and cultural factors.