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Mating rates between sterile and wild codling moths (Cydia pomonella) in springtime: a simulation study.

R Tyson1, K D Newton, H Thistlewood

  • 1Barber School of Arts and Sciences, University of British Columbia Okanagan, 3333 University Way, Kelowna, BC V1V1V7, Canada. rebecca.tyson@ubc.ca

Journal of Theoretical Biology
|July 4, 2008
PubMed
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The sterile insect technique (SIT) may be less effective for controlling orchard pests like the codling moth than anticipated. Individual behaviors can reduce SIT effectiveness, and monitoring traps may not detect this decline.

Area of Science:

  • Entomology
  • Pest Management
  • Ecological Modeling

Background:

  • The sterile insect technique (SIT) offers an environmentally friendly alternative to conventional pesticides for pest control.
  • SIT relies on releasing sterile insects to mate with wild populations, preventing offspring production and aiming for population collapse.
  • Understanding insect behavior and monitoring data is crucial for effective SIT application, especially for orchard pests like the codling moth (Cydia pomonella).

Purpose of the Study:

  • To investigate how individual sterile and wild insect behaviors influence SIT effectiveness against the codling moth.
  • To analyze the relationship between insect behavior, mating rates, and data from monitoring devices like pheromone traps.
  • To assess the reliability of trap catch data in indicating SIT effectiveness during springtime releases.

Related Experiment Videos

Main Methods:

  • Development of a preliminary individual-based model to simulate insect interactions.
  • Analysis of how variations in sterile and wild moth behavior affect mating success.
  • Evaluation of the sterile to wild trap catch ratio as an indicator of SIT performance.

Main Results:

  • Individual behaviors of sterile males may not effectively disrupt wild female mating during springtime SIT releases.
  • Monitoring data from pheromone traps might not accurately reflect reduced SIT effectiveness in these scenarios.
  • The sterile to wild trap catch ratio may not be a reliable indicator of mating interference.

Conclusions:

  • Subtle alterations in insect behavior can significantly impact SIT efficacy.
  • Relying solely on trap catch data for monitoring SIT effectiveness may be misleading.
  • Further research into behavioral dynamics is needed to optimize SIT strategies for orchard pest control.