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Effect of Lure Combination on Fruit Fly Surveillance Sensitivity
Lloyd D Stringer1,2,3,4, Rajendra Soopaya5,6, Ruth C Butler7
1The New Zealand Institute for Plant & Food Research Limited, Private Bag 4704, Christchurch, 8140, New Zealand. Lloyd.Stringer@plantandfood.co.nz.
Scientific Reports
|February 27, 2019
Summary
Combining multiple insect pest lures in single traps can improve surveillance efficiency. While some lure combinations reduce catches, increasing trap density can maintain detection sensitivity for invasive fruit flies.
Area of Science:
- Entomology
- Pest Management
- Agricultural Science
Background:
- Current insect pest surveillance methods are costly and often inefficient, with traps frequently empty of target pests.
- The establishment of new invasive insect pests is rare, suggesting that optimizing surveillance systems is crucial for early detection.
Purpose of the Study:
- To evaluate the efficacy of combined Tephritidae male lures (trimedlure, cuelure, raspberry ketone, methyl eugenol) for enhanced surveillance.
- To determine the impact of lure combinations on the catch rates of key pest species, including Ceratitis capitata and various Bactrocera species.
- To estimate the necessary increase in trap density to maintain surveillance sensitivity when using combined lures.
Main Methods:
- Field experiments were conducted in Australia and the USA using traps baited with single and multiple Tephritidae male lures.
- Catch data for Ceratitis capitata, Zeugodacus cucurbitae, Bactrocera tryoni, B. dorsalis, B. aquilonis, and B. tenuifascia were analyzed.
- Modeling was used to estimate the impact of trap density on surveillance sensitivity for Bactrocera tryoni.
Main Results:
- A 3-way lure combination significantly reduced the capture of the methyl eugenol-responsive Bactrocera dorsalis.
- Trimedlure-baited traps containing methyl eugenol showed a 3.1-fold lower catch of Ceratitis capitata in Australia, but not in Hawaii.
- Some lure combinations were found to be compatible, with potential reductions in sensitivity offset by increased trap density.
Conclusions:
- Combinations of certain male lures are compatible for early detection of tephritid flies, enhancing surveillance efficiency.
- Increased trap density can effectively compensate for any observed reductions in surveillance sensitivity when using combined lures.
- Further research is needed to explain the unexpected interaction between trimedlure and methyl eugenol on Ceratitis capitata catches in Australia.
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