Submitted to: CDFA Pierce's Disease Control Program Research Symposium
Publication Type: Abstract Only
Publication Acceptance Date: 10/26/2006
Publication Date: 11/1/2006
Citation: Nadel, H., Groves, R., Seligmann, R., Johnson, M.W. 2006. The Role of Olfactory Cues in Host-Plant Selection by the Glassy-Winged Sharpshooter, Homalodisca coagulata. 2006 CDFA Pierce's Disease Control Program Research Symposium.p.30.
Technical Abstract: The glassy-winged sharpshooter (GWSS) is a highly polyphagous and mobile vector of Pierce's disease of grapes. Trap captures in a multi-crop agricultural landscape under constant deficit irrigation suggest that adult GWSS movement is tied to irrigation schedules. To understand the observed patterns of movement, we explored the orientation and feeding responses of adult GWSS toward citrus and avocado plants undergoing various levels of water-deficit and nutritional treatments. Choice and no-choice cage studies indicate that GWSS distinguishes water-stress in hosts and prefers to settle on and feed more on well-hydrated plants. GWSS showed no significant response to a choice of citrus fertilized with ammonium or nitrate forms of nitrogen.