Journal of Pest Science (2015) 88, 181-190

Ju-Chun Hsu, Li-Hsin Huang, Hai-Tung Feng and Wen-Yin Su (2015)
Do organophosphate-based traps reduce control efficiency of resistant tephritid flies?
Journal of Pest Science 88 (1), 181-190
Abstract: Organophosphate (OP) insecticides have been an effective control of several tephritid pests. Recently, OP resistance has been observed in various fly species from different localities. However, in cases where resistance to an OP is exhibited in the field, evaluations of the efficiency of trapping with lures mixed with the same OP toxicants have not been carried out. To address this, the trapping and killing efficiency of lures with OP toxicants was assessed for flies from lines of Bactrocera dorsalis exhibiting resistance and susceptibility to OP insecticides. Specifically, bioassays were conducted with males from susceptible, resistant, and revertant lines (derived by relaxation of selection in the resistant line). The trapping and killing efficiencies of traps containing concentrations of 5 or 2.5 % naled were assayed at different exposure times. For the susceptible line, the number of dead flies found inside and outside of the trap was significantly lower than that of the other two tested lines. The number of dead flies found outside was significantly lower for the 2.5 % naled concentration compared to that of the 5 % concentration. Additionally, an analysis of genotypes showed that in trapped males, the frequencies of alleles of the acetylcholinesterase gene associated with resistance were lower compared to males of the field population collected from the same localities. In conclusion, for cases where fly lines exhibit insecticide resistance, the use of toxicant lures laced with the same insecticides may severely impact trapping effectiveness and may result in further increases of the frequency of resistant genotypes in the population.
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Link to article at publishers website
Database assignments for author(s): Ju-Chun Hsu, Li-Hsin Huang, Hai-Tung Feng

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Bactrocera dorsalis		Taiwan