CDFA Pierce's Disease / Glassy-winged Sharpshooter Board

07/31/2026

Learn vineyard monitoring and control practices for ants and vine mealybug from UC Cooperative Extension and a California PCA.

07/13/2026

Explore how temperature may shape the adaptation of Xylella fastidiosa populations in California.

In this seminar, Monica Donegan from UC Berkeley shares her dissertation research from Rodrigo Almeida’s lab. Her work combines genomic analysis with large-scale field experiments to identify temperature-associated genes and examine how different populations of Xylella fastidiosa adapt to local conditions.

Xylella Seminar: Ecological and molecular drivers of local thermal ...

07/07/2026

¿Compró usted una desert willow en Costco entre el 24 de junio y el 3 de julio?

Se detectó la presencia del insecto invasor llamado “chicharrita de alas cristalinas” (glass-winged sharpshooter) en las plantas que se vendieron en las tiendas de Costco en California. Esta plaga es una grave amenaza para los viñedos, los jardines caseros y otras plantas.

Consulte la lista de condados afectados y averigüe qué debe hacer ahora mismo: bit.ly/GWSS-Costco

07/07/2026

Did you buy a desert willow at Costco between 6/24 & 7/3?
The invasive glassy-winged sharpshooter has been found on desert willows sold at Costcos in CA. This pest is a serious threat to vineyards, backyard gardens & other plants.

Check the list of counties & learn what to do right now: bit.ly/GWSS-Costco

06/30/2026

Warmer winters, longer growing seasons & shifting vector ranges are changing the disease landscape in California vineyards. Learn about recent PD/GWSS Board-funded research on Pierce’s Disease ecology and potential control strategies. Growers will leave with a clear understanding of how area-wide programs protect premium vineyards and what today’s research means for vineyard resilience over the next decade.

REGISTER TODAY AND JOIN THE LIVE CHAT: https://wineindustryadvisor....

06/22/2026

Check out this podcast "Three-Cornered Alfalfa Hopper: Monitoring, Models, and Management"

Enjoy interviews with researchers, farmers, and thought leaders in the area of sustainable wine growing.

06/19/2026

"U.S. Sens. Alex Padilla and Adam Schiff, D-Calif., are urging U.S. Department of Agriculture Secretary Brooke Rollins to provide emergency funding to the state to combat the threat of the glassy-winged sharpshooter."

Read more at:

California lawmakers have appealed to the U.S. Department of Agriculture for monies to combat the invasive pest threatening the wine industry.

06/11/2026

Response efforts are underway after GWSS was found on grapevines sold at select Costco locations.

If you purchased a grapevine from Costco between 4/21 & 5/21, contact your County Agricultural Commissioner's Office right away. Early detection is critical to preventing this invasive pest from spreading.

Get contact info & learn more: bit.ly/GWSS-Costco
https://www.foxla.com/video/fmc-czcaqy9hgorisjd1.amp

Glassy-winged sharpshooters spread Pierce's disease, a bacterial infection that is fatal to grapevines and can also damage almond, citrus and ornamental plants, posing a significant threat to California agriculture and home gardens.

06/06/2026

Fresno County - Did you buy a grapevine at Costco between April 21 & May 21?

The invasive glassy-winged sharpshooter has been found on grapevines sold at Costco in Fresno & 23 other counties. This pest is a serious threat to vineyards, backyard gardens & other plants.

Learn what to do right now: https://bit.ly/GWSS-Costco

06/06/2026

Grapevines from a Fresno nursery shipped to California Costco stores in April and May were found to be carrying the glassy-winged sharpshooter (GWSS), an insect capable of spreading a potentially lethal vine disease.

The California Department of Food and Agriculture is urging anyone who purchased grapevines from Costco stores in Northern California between April 21 and May 21 to contact their local agricultural commissioner after an invasive pest was discovered among the 13,000 vines shipped during that period.

Read more:
https://pressreleases.cdfa.ca.gov/Home/PressRelease/68859812