Pierces disease

Pierce's disease

Photo: Alex H Purcell, University of California, Berkeley, Bugwood.org

  • Caused by a bacterium (Xylella fastidiosa) that lives in the water conducting system (xylem) of grapevines
  • Grapevines show symptoms of water stress, such as leaf scorch, and the plant progressively weakens and dies
  • Can be transmitted in infected propagation material and by leafhoppers such as the exotic Glassy-winged sharpshooter
  • Present in North America, Central America and some regions of South America
  • The diseases caused by Xylella fastidiosa go by a range of names depending on the host species, including: Pierce’s disease, almond leaf scorch, bacterial leaf scorch, citrus variagated chlorosis, olive quick decline and olive leaf scorch.

High priority pest of: Almonds, Apples and pears, Blueberries, Canned fruit, Cherries, Citrus, Cutflowers, Dried fruit, Macadamias, Olives (X. fastidiosa subsp. multiplex and pauca), Production nurseries, Rubus, Summerfruit, Table grapes, Truffles, Walnuts, Wine grapes

Scientific name: Xylella fastidiosa
EPPRD Category: 2
Life Form: Bacteria

Pest Documents

FS: fact sheet

CP: contingency plan

DP: diagnostic protocol