Journal of Economic Entomology (2009) 102, 1791-1800

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S.R. Collins, C.W. Weldon, C. Banos and P.W. Taylor (2009)
Optimizing irradiation dose for sterility induction and quality of Bactrocera tryoni
Journal of Economic Entomology 102 (5), 1791-1800
Abstract: The current study is an important step toward calibrating, validating, and improving irradiation methods used for Bactrocera tryoni (Froggatt) sterile insect technique (SIT). We used routine International Atomic Energy Agency/U.S. Department of Agriculture/Food and Agriculture Organization quality control tests assessing percentage of emergence, flight ability, sex ratio, mortality under stress, reproductive sterility, and sexual competitiveness, as well as a nonstandard test of longevity under nutritional stress to assess the impact of a range of target irradiation doses (60, 65, 70, 75, and 80 Gy) on the product quality of mass reared B. tryoni used in SIT. Sterility induction remained adequate (>99.5%) for sterile male-fertile female crosses, and 100% sterility was achieved in fertile male-sterile female crosses and sterile male-sterile female crosses for each irradiation doses tested. There was significant increase in mortality under stress as irradiation dose increased, and reduced participation in mating by males irradiated at higher doses. The current target-sterilizing dose for SIT of 70-75 Gy is associated with significant reduction in fly product "quality." Our data suggest that adequate sterility and improved fly quality could be achieved through a small reduction in target sterilizing dose.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Christopher W. Weldon, Phillip W. Taylor

Research topic(s) for pests/diseases/weeds:
control - general
quarantine treatments/regulations/aspects

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Bactrocera tryoni