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Effect of adult chill treatments on recovery, longevity and flight ability of Queensland fruit fly, Bactrocera tryoni (Froggatt) (Diptera: Tephritidae)

Published online by Cambridge University Press:  08 July 2010

O.L. Reynolds  and
B.A. Orchard
O.L. Reynolds*
Affiliation:
EH Graham Centre for Agricultural Innovation (Industry and Investment New South Wales and Charles Sturt University), Woodbridge Road, Menangle, NSW 2568Australia
B.A. Orchard
Affiliation:
Industry and Investment New South Wales, Private Mail Bag, Wagga Wagga, NSW 2650Australia
*
*Author for correspondence Fax: +61(0)246406300 E-mail: olivia.reynolds@industry.nsw.gov.au
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Abstract

Control of Queensland fruit fly, Bactrocera tryoni (Froggatt) (Diptera: Tephritidae), populations or outbreaks may be achieved through the mass-rearing and inundative release of sterile B. tryoni. An alternative release method is to release chilled adult sterile fruit flies to decrease packaging and transport requirements and potentially improve release efficiencies. Two trials were conducted to determine the effect of chilling on the performance of two separate batches of adult B. tryoni, fed either a protein and sucrose diet or sucrose only diet. The first trial compared chill times of 0, 0.5, 2 and 4 h; the second trial compared chill times of 0, 2, 4, 8 and 24 h. Overall, there was little or no affect of chilling on the recovery, longevity and flight ability of B. tryoni chilled at 4°C. Recovery time can take up to 15 min for chilled adult flies. There was no effect of chill time on longevity although females generally had greater longevity on either diet compared with males. Propensity for flight was not adversely affected by chilling at the lower chill times in trial 1; however, in trial 2, adults fed on a protein and sucrose diet had a decreased tendency for flight as the chilling time increased. Fly body size did not affect recovery times although the smaller adult B. tryoni in trial 1 had significantly reduced longevity compared to the larger adults in trial 2. Implications of these findings for B. tryoni SIT are discussed.

Keywords

sterile insect techniquesterile releasechilled adult release
Type
Research Paper
Information
Bulletin of Entomological Research , Volume 101 , Issue 1 , February 2011 , pp. 63 - 71
Copyright
Copyright © Cambridge University Press 2010

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