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Location: Brea, Ca
Posted: Sep/29/2010 10:42 AM PST
Pierce's disease, AKA, PD.
University of California, Riverside reported 10 April 2008 that the PD scorch disease is adversely affecting Liquid Amber trees, along with several other plant varieties - most importantly grape vines, especially Chardonnays. The disease is caused by one specific strain of the bacterium, Xylella fastidosa. The disease is most often spread by either the native blue-green Glassy-winged sharpshooter, or the glassy-winged sharpshooter (GWSS) plant vectors.
"State and federal agencies mounted successful area-wide insecticide treatments and biological control releases that have suppressed GWSS numbers. These measures offer temporary relief at a high cost met by emergency funds, which likely cannot be sustained in the long term. A new technique that offers a more permanent solution is badly needed, and symbiotic control is one of these."
Intro to PD: www.cnr.berkeley.edu/xylella/
PD control program: www.cdfa.ca.gov/phpps/pdcp/
Robert Sackett, California State Lic 351682