Short-range dispersal of recently emerged males and females of Bactrocera tryoni (Froggatt) (Diptera

Tephritidae) monitored by sticky sphere traps baited with protein and Lynfield traps baited with cue-lure

Christopher Weldon*, Alan Meats

*Corresponding author for this work

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Dispersal of immature male and female Queensland fruit fly, Bactrocera tryoni (Froggatt) (Diptera: Tephritidae), was assessed over a period of 1 week from a single release point on three separate occasions using an array of Lynfield traps baited with cue-lure and odouriferous yellow or black sticky spheres baited with food lure (protein autolysate). Lynfield traps recaptured males; yellow or black spheres recaptured both sexes in approximately equal proportions, although at a much lower rate. As a percentage of the recapture rate for males by Lynfield traps, the mean recapture rate for yellow spheres ranged from 1.0% to 7.5% for males and 0.7% to 4.0% for females, whereas the recapture rates for black spheres ranged from 0.4% to 3.6% and 0.6% to 1.8%, respectively. The rate of recapture of sterile male flies was greater than that of unsterilised flies; this may have been due to a faster maturation rate in sterile males or because a greater proportion of them remained within the trap array rather than dispersing. There was no significant trend in recapture rate with distance from the release point to the edge of the array (88 m), except in the case of females on sticky traps where no trend was detected between 19 and 88 m. These results lend support to assumptions made about the distribution of males and females with respect to the minimum breeding density of fruit fly propagules invading a fly-free zone, and the method chosen to distribute sterile B. tryoni for the sterile insect technique.

Original languageEnglish
Pages (from-to)160-166
Number of pages7
JournalAustralian Journal of Entomology
Volume46
Issue number2
DOIs
Publication statusPublished - May 2007

Keywords

  • Cue-lure
  • Dispersion
  • Food lure
  • Queensland fruit fly
  • Recapture rate
  • Sterile insect technique (SIT)

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