View interactive data dashboards that help Napa County grape growers and vineyard managers monitor key pest and disease threats in real time.
Blue-Green Sharpshooter live map
This dashboard details data from 192 traps throughout 16 growing regions in Napa county. Traps are checked every 3 weeks during the growing season. Traps are categorized as riparian, building (ornamental), PD site, and 50-500m. Riparian and building traps are located ≤ 50m away from a riparian area or building. Intermediate traps are 50-500m from a riparian area or building. PD site traps were part of previous trials.
Red blotch vector(s) live map (Current)
This dashboard displays vector monitoring data in 7 unique vineyard blocks in Napa County. Traps are located in 2 distinct areas of each block defined by their disease risk: The hot spot (high risk area) where GRBD is spreading rapidly in a clustered pattern, and the cold spot (low risk area) where GRBD is spreading slowly in a random pattern.
Red blotch vector(s) historical (2021-2025)
From 2021-2025, the UCCE Napa Vit Team monitored vectors in 9 unique vineyard blocks in Napa County across 6 AVAs. Our grower partners monitored 22 blocks across 11 AVAs, for a collective total of 31 blocks in 12 different AVAs.
Treehopper Girdle Monitoring
In addition to monitoring vector populations with yellow panel traps, the UCCE team is monitoring treehopper feeding activity indirectly by tracking girdles located on petiole, lateral, or shoot tissue.
GRBV testing in nursery shipment
In 2025 and 2026, the UCCE team is using the LAMP-GRBV assay to test incoming nursery shipments for Grapevine Red blotch Disease throughout the Napa Valley. This dashboard provides a breakdown of shipments tested and the results.
2022 Leafhoppers
From March to August of 2022 the UCCE vit team monitored three different species of leafhopper populations (Western Grape, Virginia Creeper and Variegated) from three study sites. Yellow panel traps were used to trap and count adults while the undersides of leaves were observed to count nymphs.
In the dashboard, you can view nymph and adult counts for the individual sites as well as the aggregate count between all sites from week to week.