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United States Department of Agriculture

Agricultural Research Service

Research Project: POSTHARVEST TREATMENT OF TROPICAL COMMODITIES FOR QUARANTINE SECURITY, QUALITY MAINTENANCE, AND VALUE ENHANCEMENT

Location: Tropical Crop and Commodity Protection Research

Title: Fruit Fly (Diptera: Tephritidae) Thermotolerance and Quarantine Heat Treatments.

Authors
item Armstrong, John
item Jang, Eric
item Wang, Shaojin - WASH ST UNIV, PULLMAN
item Tang, Juming - WASH ST UNIV, PULLMAN

Submitted to: Entomological Society of America Annual Meeting
Publication Type: Other
Publication Acceptance Date: December 18, 2005
Publication Date: December 18, 2005
Citation: Armstrong, J.W., Jang, E.B., Wang, S., Tang, J. 2005. Fruit fly (diptera: tephritidae) thermotolerance and quarantine heat treatments. Entomological Society of America Annual Meeting.

Interpretive Summary: Quarantine heat treatments, including hot-water immersion, vapor heat, and forced hot air, are used to prevent the spread of exotic fruit flies through marketing channels. Treating fruits infested with eggs, first instars, second instars, or third instars for multiple fruit fly species to develop treatment parameters that provide quarantine security is an expensive, labor intensive, and lengthy process. To reduce costs and accelerate the development of new heat treatments, only the most heat-tolerant fruit fly species and life stage(s) are subjected to 'in situ' bioassay against selected time and temperature parameters of the candidate heat treatment. Presently, three methods are used to determine the most heat-tolerant fruit fly species and life stages: static-temperature water bath, transient-temperature water bath, or, most recently, a heating block system. Shown are the three systems with discussions on their use and efficacy.

Technical Abstract: Quarantine heat treatments, including hot-water immersion, vapor heat, and forced hot air, are used to prevent the spread of exotic fruit flies through marketing channels. Treating fruits infested with eggs, first instars, second instars, or third instars for multiple fruit fly species to develop treatment parameters that provide quarantine security is an expensive, labor intensive, and lengthy process. To reduce costs and accelerate the development of new heat treatments, only the most heat-tolerant fruit fly species and life stage(s) are subjected to 'in situ' bioassay against selected time and temperature parameters of the candidate heat treatment. Presently, three methods are used to determine the most heat-tolerant fruit fly species and life stages: static-temperature water bath, transient-temperature water bath, or, most recently, a heating block system. Shown are the three systems with discussions on their use and efficacy.

Last Modified: 8/27/2014
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