''Graphocephala atropunctata'', commonly known as the blue-green sharpshooter, is a

hemiptera Hemiptera (; ) is an order (biology), order of insects, commonly called true bugs, comprising over 80,000 species within groups such as the cicadas, aphids, planthoppers, leafhoppers, Reduviidae, assassin bugs, Cimex, bed bugs, and shield bugs. ...

n bug

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to California. It carries the phytopathogenic bacteria '' Xylella fastidiosa'' which infects the xylem of grape vines causing die-back – known as

Pierce's disease ''Xylella fastidiosa'' is an aerobic, Gram-negative bacterium of the genus ''Xylella''. It is a plant pathogen, that grows in the water transport tissues of plants ( xylem vessels) and is transmitted exclusively by xylem sap-feeding insects such ...

. This leads to loss of productivity and economic damage to the California vineyards.

References

Cicadellini Insects described in 1854 {{Cicadellinae-stub