Technical Abstract: New Zealand is threatened by invasion of the glassy-winged sharpshooter (GWSS), Homalodisca vitripennis, an important vector of Xylella fastidiosa, a gram-negative bacterium that causes Pierce¿s Disease in grape and scorch diseases in many other horticultural crops. Therefore, an understanding of the host range, feeding behavior and potential vector efficiency of GWSS on New Zealand crops is important. We tested host plant acceptance and feeding behaviors of GWSS on three common horticultural crops grown in New Zealand (apple, grape, citrus), and a native plant, pohutukawa, using the Electrical Penetration Graph (EPG) technique. Probing (stylet penetration) behaviors varied on host plants primarily as evidenced by differences in waveform event durations. Apple and grape were the most preferred host plants, on which GWSS spent the majority of its time probing and readily located and accepted a xylem cell; this resulted in long durations of sustained xylem fluid ingestion. In contrast, pohutukawa was the least preferred host, on which GWSS spent much less time probing. GWSS engaged in longer and more frequent testing/searching activities, rejected xylem cells frequently, and spent less time with stylets resting, before accepting a xylem cell and ultimately performing the same amount of sustained ingestion. Insecticide-treated citrus was intermediate between these extremes, with some acceptance of xylem, but less ingestion, probably due to partial paralysis of the cibarial muscles. Implications for transmission of X. fastidiosa and host plant resistance also are discussed.