Messenger and particle film Surround reduces Pierces disease development in grape

• Author(s): Bartels, David; Ciomperlik, Matthew; Civerolo, Ed; Hashim, Jennifer; Luvisi, Don; Purterka, G.; Tubajika, Kayimbi; Wendel, Lloyd;
• Abstract: Incidence of Pierces disease (PD) caused by Xylella fastidiosa continues to increase in many vineyards in California due to the establishment and spread of the vector, the glassy winged sharpshooter, Homalodisca coagulata. Commercially available materials (e.g. Particle film barrier (Surround WP) containing 95% kaolin and systemic acquired resistance inducer (Messenger) containing 3% harpin) were evaluated for their effects on reducing X. fastidiosa transmission, and preventing X. fastidiosa infections and PD development. During the 2-year study, PD development was lower (6%) in Surround treated plots than in Conventional insecticide treated plots (14%). No Surround by grapevine variety interaction was observed in either year. PD development in Messenger treated plots was 13%, 7%, and 6% with 2.25, 4.50, and 6.50 oz Messenger/A, respectively. PD incidence in untreated control was 18%. Results show that Messenger and Surround would be useful in reducing PD development.
• Publication Date: Jun 2003
• Journal: Phytopathology