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Title: LABORATORY AND FIELD EVALUATIONS OF IMIDACLOPRID (ADMIRE), THIAMETHOXAM (PLATINUM), AND ACETAMIPRID (ASSAIL) AGAINST THE GLASSY-WINGED SHARPSHOOTER

Author
item TOSCANO, NICK - U CA, RIVERSIDE
item BYRNE, FRANK - U CA, RIVERSIDE
item CASTLE, STEVEN
item LEARNED, MAC - BAYER CROPSCIENCE
item GISPERT, CARMEN - UC COOP EXT
item DRAKE, BEN - DRAKE ENTERPRISES

Submitted to: CDFA Pierce's Disease Control Program Research Symposium
Publication Type: Proceedings
Publication Acceptance Date: 12/12/2004
Publication Date: 12/12/2004
Citation: Toscano, N.C., Byrne, F.J., Castle, S.J., Learned, M., Gispert, C., Drake, B. 2004. Laboratory and field evaluations of imidacloprid (admire), thiamethoxam (platinum), and acetamiprid (assail) against the glassy-winged sharpshooter. CDFA Pierce's Disease Control Program Research Symposium. pp. 371-374

Interpretive Summary: Admire and Platinum applications were compared in Temecula vineyards. Although the uptake and residual persistence of both products was excellent, peak levels of Platinum within the xylem fluid of vines were almost to-fold higher than Admire levels despite a lower application rate. In studies conducted in vineyards in the Coachella Valley, Admire uptake was considerably less efficient than that measured in Temecula vineyards. This could be rationalized by differences in soil properties between the two regions and the impact of irrigation practices. In soil column studies, Admire was shown to be more mobile in Coachella soils. Uptake was improved in vines that were under a strict irrigation regime that delivered water according to recommended vine requirements. Under these conditions, Admire within the xylem fluid attained recommended levels for GWSS suppression. In a preliminary evaluation of foliar applications of Assail, residues of acetamiprid, the active ingredient of this insecticide, were detected within the xylem fluid. Therefore, foliar applications may prove effective against GWSS both through contact and systemic activity.

Technical Abstract: Admire and Platinum applications were compared in Temecula vineyards. Although the uptake and residual persistence of both products was excellent, peak levels of Platinum within the xylem fluid of vines were almost to-fold higher than Admire levels despite a lower application rate. In studies conducted in vineyards in the Coachella Valley, Admire uptake was considerably less efficient than that measured in Temecula vineyards. This could be rationalized by differences in soil properties between the two regions and the impact of irrigation practices. In soil column studies, Admire was shown to be more mobile in Coachella soils. Uptake was improved in vines that were under a strict irrigation regime that delivered water according to recommended vine requirements. Under these conditions, Admire within the xylem fluid attained recommended levels for GWSS suppression. In a preliminary evaluation of foliar applications of Assail, residues of acetamiprid, the active ingredient of this insecticide, were detected within the xylem fluid. Therefore, foliar applications may prove effective against GWSS both through contact and systemic activity.