Plant water stress effects on stylet probing behaviors of Homalodisca vitripennis (Hemiptera: Cicadellidae) associated with acquisition and inoculation of the bacterium Xylella fastidiosa.

摘要: The glassy-winged sharpshooter, Homalodisca vitripennis (Germar) (Hemiptera: Cicadellidae), is a xylem fluid-ingesting leafhopper that transmits χylella fastidiosa Wells et al., plant-infecting bacterium causes several plant diseases in the Americas. Although role of water stress on population density and dispersal H. has been studied, nothing isknown about effects transmission χ. by vitripennis.Alaboratory study was conducted to determine influence sharpshooter stylet probing behaviors associated with acquisition inoculation fastidiosa. Electrical penetration graph used monitor feeding for 20-h periods citrus [Citrus sinensis (L.) Osbeck] almond [Prunus dulcis (Miller) D.A. Webb] plants subjected levels stress. Adult successfully located vessels, then performed related evaluation cell fluid, finally ingested fluid from under tested tensions ranging -5.5 -33.0 bars -6.0 -24.5 bars, respectively. In general, long frequent events were observed only fully irrigated (i.e., >-10 bars), which suggests even low may reduce spread Results provided insights disease epidemiology support hypothesis application regulated deficit irrigation potential incidence caused reducing number vectors decreasing pathogen efficiency.