Skip to main content

Sharpshooters & Pierce's disease in Southern California

Department of Entomology

glassy winged sharp-shooter
Sharpshooters & Pierce's disease

The purpose of this site is to provide information on the biology and management of sharpshooters and Pierce's disease, with a focus on Southern California vineyards and surrounding areas.

The blog will be used to post regular updates on the results of the Temecula glassy-winged sharpshooter areawide monitoring program and to occasionally share other information relevant to sharpshooters, Xylella fastidiosa, or Pierce's disease.

For more information, contact Matt Daugherty (matt.daugherty@ucr.edu; 951-827-2246)

GWSS newsletter 9/8/2021

Here are the latest GWSS monitoring results from Temecula:

GWSS newsletter 8/25/2021

Here are the latest GWSS monitoring results from Temecula:

GWSS newsletter 8/11/21

Here are the latest GWSS monitoring results from Temecula:

Scouting for Pierce's disease

As things ramp up in preparation for harvest, it is also a good time of the year to keep an eye out for Pierce's disease. Symptoms are strongest this time of year, therefore consider scouting the vineyard as time allows and flag suspected diseased vines for later removal. The following document has some additional details...

GWSS newsletter 7/28/21

The most recent GWSS trapping results from Temecula are in the following document:

How bad a GWSS year is it going to be?

One of the big challenges with managing Pierce’s disease in California vineyards is there can be tremendous variability in vector activity and Xylella fastidiosa spread among locations and over time. They’re moving targets. This is particularly true for the glassy-winged sharpshooter, which has strong seasonal patterns of activity and substantial year-to-year variability in activity. Seasonal...

GWSS newsletter 6/30/21

Here are updated GWSS trapping results for Temecula:

GWSS newsletter 6/16/21

Here are the most recent Temecula monitoring results:

GWSS newsletter 6/2/21

Here is an update on GWSS trapping in Temecula:

UC resources for dealing with drought

After a brief hiatus, we are back in drought. Some University of California resources for dealing with drought can be found here: http://ucanr.edu/drought

GWSS newsletter - 5/19/21

Here is a copy of the most recent glass-wingd sharpshooter monitoring results from Temecula:

Trap locations

There are periodically questions about the locations of the traps that are reported in the GWSS newsletter. Most of them are shown in the image below: It is a big image, but high enough resolution that you can zoom in pretty far. The numbers are the same as those listed on the 2nd page of...

GWSS newsletter 5/6/21

Here is a copy of the most recent glass-wingd sharpshooter monitoring results from Temecula:

Welcome back

After a long hiatus due to some university IT stumbles, the blog is back. Keep an eye out here for updates on the Temecula GWSS areawide monitoring program and other information about sharpshooter and Pierce's disease biology and management. Any questions should be directed toward Matt ( matt.daugherty@ucr.edu; 951-827-2246)
Let us help you with your search