|Caprile, Janet - UNIV OF CALIF COOP EXT|
Submitted to: Western Orchard Pest and Disease Management Conference
Publication Type: Abstract Only
Publication Acceptance Date: December 15, 2005
Publication Date: January 10, 2006
Citation: Light, D.M., Bouyssounouse, P.I., Caprile, J. 2006. "Wombo Combo" Mating Disruption: Three Years of Codling Moth Field Trials in Apples Using Dispensers with Pear Ester Kairomone and Pheromone. Meeting Abstract. Technical Abstract: The effect of the pear ester kairomone (PE) [ethyl (2E, 4Z)-2,4-decadienoate] adjuvant on the efficacy pheromone-based mating disruption has been tested for three years (2003 – 2005) using hand-applied dispensers in trials in 11 Granny Smith apple orchards in California. Pear ester kairomone was formulated in polymeric matrix block-like dispensers, either as PE-alone or PE combined with pheromone in ‘Combo-dispensers.’ The dispenser treatments evaluated were a standard pheromone dispenser loop (Isomate CTT, Pacific Biocontrol, Inc.), a polymeric matrix pheromone dispenser (CIDETRAK – CM, Trece, Inc.), PE-alone dispenser that was co-hung with Isomate CTT loop, and a combo-dispenser with both PE and pheromone (CIDETRAK CM-DA Combo, Trece, Inc.). Coverage and residual activity of the MD applications were evaluated by the “shut-down” of pheromone-baited and kairomone-baited monitoring traps. Treatment control efficacy was evaluated through fruit injury assessments after the first and second flights and just prior to harvest. Results show that the PE adjuvant combined with the pheromone disruptant reduced fruit damage rates from 40% to 100% below the low damaged rates incurred with pheromone – alone dispensers. A key contribution of the kairomone adjuvant was the reduction in percentage of multiple-matings by females.