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1 February 2009 Efficacy and Release Rate of Reservoir Pheromone Dispensers for Simultaneous Mating Disruption of Codling Moth and Oriental Fruit Moth (Lepidoptera: Tortricidae)
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Abstract

Five formulations of controlled release, polyethylene tube dispensers of pheromone were evaluated during three field seasons for disruption of codling moth, Cydia pomonella (L.) (Lepidoptera: Tortricidae), and the oriental fruit moth, Grapholita molesta (Busck) (Lepidoptera: Tortricidae). Evaluations were conducted in replicated 4-ha plots of commercial apple in Michigan. Disruption of both C. pomonella and G. molesta male orientation to pheromone traps in plots treated with a dual-species formulation (Isomate CM/OFM TT), simultaneously releasing the pheromone components of both C. pomonella and G. molesta, was equivalent to that obtained by treating plots with separate formulations for each species (Isomate C Plus or Isomate C TT for C. pomonella and Isomate M Rosso for G. molesta) through mid-season. However, disruption efficacy of the dual-species formulation was significantly lower near the end of the season for G. molesta compared with the Isomate M Rosso formulation because of depletion of active ingredients and coincided with a slight increase in fruit injury. Effective disruption of C. pomonella and G. molesta also was obtained with a multispecies formulation (Isomate CM/OFM/LR) that releases the main pheromone components of C. pomonella, G. molesta, and several leafroller species. Each formulation type releasing (E,E)-8,10-dodecadien-1-ol (codlemone) also was found to release the E,Z- and Z,E-isomers of codlemone. Our data provide further evidence that simultaneous disruption of C. pomonella and G. molesta with dispensers releasing both species'pheromone components is possible; however, the controlled release formulations tested here require modification or postponed deployment coupled with early season control by other means to achieve season-long efficacy. Simultaneous disruption of several species with a single formulation will be economically advantageous in regions where control of multiple pests is needed given the need for hand application of this technology.

© 2009 Entomological Society of America
L. L. Stelinski, A. L. Il'Ichev, and L. J. Gut "Efficacy and Release Rate of Reservoir Pheromone Dispensers for Simultaneous Mating Disruption of Codling Moth and Oriental Fruit Moth (Lepidoptera: Tortricidae)," Journal of Economic Entomology 102(1), 315-323, (1 February 2009). https://doi.org/10.1603/029.102.0142
Received: 14 May 2008; Accepted: 1 September 2008; Published: 1 February 2009
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