Electropenetrography
Guides
Graphocephala atropunctata
blue-green sharpshooter
Graphocephala atropunctata, commonly known as the blue-green sharpshooter, is a xylem-feeding leafhopper native to the western United States. It is the principal native vector of Xylella fastidiosa, the bacterium that causes Pierce's disease in grapevines. This species has been extensively studied for its feeding behaviors using electropenetrography (EPG) techniques, which have characterized distinct waveform patterns associated with stylet penetration and xylem ingestion. Its role as a disease vector makes it economically significant to California's vineyard industry.