There are three species of leafhoppers (Erythroneura) in Napa County vineyards; Western grape, Virginia creeper, and Variegated leafhopper. Adults and nymphs damage vines by feeding in the leaf mesophyll, giving leaves a white speckled appearance. Learn to identify vineyard leafhoppers. (PDF 1.9 MB)Manage leafhopper populations in organic vineyards. (PDF 1.9 MB)
