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Aerosol emitters disrupt codling moth, Cydia pomonella, competitively
Peter S McGhee1, Larry J Gut, James R Miller
1Entomology Department, Michigan State University, East Lansing, MI, USA.
Pest Management Science
|January 25, 2014
Summary
Isomate CM MIST aerosol emitters disrupt codling moth mating by creating false pheromone trails, requiring 5 units per hectare for effective control. This method is more labor-efficient than traditional dispensers but works best in large, contiguous areas.
Area of Science:
- Entomology
- Pest Management
- Chemical Ecology
Background:
- Isomate CM MIST aerosol emitters utilize codlemone (E,E)-8,10-dodecadien-1-ol to disrupt codling moth mating.
- Deployment at various densities in apple orchards aimed to establish dosage-response profiles.
Purpose of the Study:
- To elucidate the behavioral mechanism of mating disruption caused by Isomate CM MIST.
- To determine the effective dosage and deployment strategy for codling moth control.
Main Methods:
- Aerosol emitters were deployed at different densities in a commercial apple orchard.
- Codling moth captures in traps were monitored to assess disruption levels.
- Data were analyzed using Miller-Gut and Miller-de Lame plots.
Main Results:
- Moth captures decreased with increasing emitter density, with over 90% disruption at >5 units/ha.
- Male moth catches dropped from 28/trap in controls to 0.9/trap at high densities.
- Data analysis supported competitive disruption, likely via false-plume following.
Conclusions:
- Isomate CM MIST likely disrupts mating by inducing false-plume following, not camouflage.
- 5 MIST units/ha are needed for efficacy comparable to standard pheromone dispensers.
- Low deployment density may create gaps in coverage; large, contiguous block treatments are recommended for optimal results.
