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Spatial analysis of mass trapping: how close is close enough?

David M Suckling1,2,3,4, Lloyd D Stringer1,2,3,4, John M Kean3,5

  • 1The New Zealand Institute for Plant and Food Research Limited, Christchurch, New Zealand.

Pest Management Science
|December 4, 2014
PubMed
Summary

A new method assesses trap interference to aid mass trapping development. This rapid technique helps identify effective attractants for pest control, optimizing insect trap placement and density for better results.

Keywords:
Dasineura maliEpiphyas postvittanaPseudococcus calceolariaeThrips obscuratusarthropodmass trappingpheromonesemiochemicalvertebrate

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Area of Science:

  • Agricultural Entomology
  • Pest Management Science
  • Chemical Ecology

Background:

  • Developing effective mass trapping strategies requires standardized methods for screening novel attractants.
  • Trap interference, where traps compete for insects, can significantly impact efficacy.
  • Previous methods for assessing trap interference were not standardized.

Purpose of the Study:

  • To develop and validate a simple method for quantifying trap interference.
  • To assess the potential for mass trapping using different attractants and trap spacings.
  • To provide a rapid preliminary assessment for mass trapping development.

Main Methods:

  • Utilized 4x4 trap arrays with varying spacings to quantify trap interference.
  • Measured the ratio of insect catch in corner traps versus center traps.
  • Tested sex pheromones for Lepidoptera (Epiphyas postvittana), Diptera (Dasineura mali), Homoptera (Pseudococcus calceolariae), and a kairomone for Thrips obscuratus.

Main Results:

  • Significant trap interference was observed for Dasineura mali even at low densities (16 traps ha⁻¹), with corner:center catch ratios around 5:1.
  • Trap competition was evident for Pseudococcus calceolariae sex pheromone lures at spacings under 5m.
  • No significant trap competition was detected for Thrips obscuratus with a kairomone at 4m spacings.

Conclusions:

  • The ratio of corner to center trap catch in a 16-trap array provides a rapid preliminary assessment for mass trapping potential.
  • This method can expedite the development of mass trapping strategies by identifying optimal attractant and spacing combinations.
  • Further research on vital rates and dispersal is necessary for precise population suppression predictions.