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Title: LABORATORY AND FIELD EVALUATIONS OF IMIDACLOPRID AND THIAMETHOXAM AGAINST GWSS ON CITRUS AND GRAPES

Author
item TOSCANO, NICK - UNIV OF CA.RIVERSIDE
item CASTLE, STEVEN
item BYRNE, FRANK - UNIV OF CA.RIVERSIDE
item BI, JIAN - UNIV OF CA.RIVERSIDE
item PRABHAKER, NILIMA - UNIV OF CA.RIVERSIDE
item LEARNED, MAC - BAYER CORP PASO ROBLES CA

Submitted to: CDFA Pierce's Disease Control Program Research Symposium
Publication Type: Proceedings
Publication Acceptance Date: 12/1/2002
Publication Date: 12/30/2002
Citation: TOSCANO, N., CASTLE, S.J., BYRNE, F., BI, J., PRABHAKER, N., LEARNED, M. LABORATORY AND FIELD EVALUATIONS OF IMIDACLOPRID AND THIAMETHOXAM AGAINST GWSS ON CITRUS AND GRAPES, SYMPOSIUM DECEMBER 15-18, 2002. pp. 141-142. . CDFA PIERCE'S DISEASE CONTROL PROGRAM RESEARCH SYMPOSIUM. 2002.

Interpretive Summary:

Technical Abstract: Much evidence has accumulated over the past few years pointing to the significant role played by imidacloprid (Admire(r)) in reducing GWSS populations. In regions of California where imidacloprid has been used in area-wide control programs, populations of GWSS have declined substantially relative to their pre-action levels. For example, remnant GWSS infestations in Temecula appear to be associated primarily with untreated tracts of vegetation such as organic citrus, while .their densities in conventional orchards and vineyards are extremely low. Similarly, GWSS population densities have been substantially reduced in southern Kern County as an outcome of the General Beale Road project. In contrast, other areas with high populations of GWSS such as Ventura/Fillmore and Riverside/Redlands that have not yet participated in area-wide control programs still retain high GWSS populations. The significant reduction of GWSS densities in only those regions where concerted action has been mounted is persuasive, even if it is only indirect evidence of the role that imidacloprid treatments have played in curtailing GWSS populations.