CDFA Pierce's Disease / Glassy-winged Sharpshooter Board

The study included among the most comprehensive testing of blue-green sharpshooter infection status to date. The research confirms that growers need to manage BGSS populations in spring and remove infected vines, and it also suggests that late summer and fall vector management may be warranted.

??On the Research Front ?? Researchers are addressing grapevine fanleaf virus by studying its interaction with plant hosts, as current management strategies relying on resistant rootstocks can delay but ultimately do not prevent infection.

GWSS is an aggressive insect vector of PD. We've used biological control agents to control GWSS since 2001, slowing the spread of PD & contributing to healthier vineyards.

??On the Research Front ?? This project aims to create strains of the glassy-winged sharpshooter (GWSS) that cannot pick up or spread Xylella fastidiosa by using CRISPR-based technology to genetically modify GWSS.?

Effective pest & disease management is crucial for safeguarding California's winegrapes. Learn about the work being done to keep growers' investment safe: bit.ly/PDGWSSboard.

??On the Research Front ??The PD/GWSS Board is funding Foundation Plant Services to propagate, test and treat priority grapevine selections so they can be maintained in the FPS greenhouse as a source of high-quality grapevine stock for distribution to nurseries.

New Research Project: To arm nurseries with more tools to eliminate GWSS from plants heading north, the PD/GWSS Board funded a one-year research project to assess the effectiveness of the insecticide flupyradifurone?(Altus?).

Research driven by the PD/GWSS Board for the past 25 years remains the cornerstone for developing effective pest & disease management & long-term solutions. Check out research highlights at: bit.ly/PDBoardResearch

Research funded by the PD/GWSS Board allows leading scientists to work toward finding solutions to PD & other serious winegrape pests & diseases. Since 2001, $57.7 million has been invested in research & outreach.

Nursery Stock Approved Treatment Program (ATP): In 2024, there were 6,211 ATP shipments, consisting of approximately 1.36 million plants. No regulatory actions were taken against any ATP nurseries for viable life stages.