About Pierce's Disease
Pierce's Disease is a deadly disease of grapevines. It is caused by the bacterium Xylella fastidiosa, which is spread by xylem feeding leafhoppers known as sharpshooters.
Pierce's Disease is known to be prevalent within the USA from Florida to California, and outside the USA in Central and South America. Xylella fastidiosa works by blocking
the xylem, which conducts the water around the plant. Symptoms include chlorosis and scorching of leaves, and entire vines will die after 1-5 years. Pierce's Disease
is less prevalent where winter temperatures are cold, such as more northern areas, high altitudes and inland areas.
Upcoming PD/GWSS Board and Advisory Task Force Meeting
No Pierce's Disease Research Symposium in 2017
: October 17, 2017Time
: 10:00 AMLocation
: California Department of Food and Agriculture, 2800 Gateway Oaks Drive, Room 267, Sacramento, CA 95833. Read More →
View Past Announcements
A Pierce's Disease Research Symposium will not be held in 2017.Read More →
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