Journal article
Thermal Death Kinetics of Red Flour Beetle (Coleoptera: Tenebrionidae)
Journal of economic entomology, Vol.97(6), pp.1868-1873
12/01/2004
Handle:
https://hdl.handle.net/2376/110179
Abstract
While developing radio frequency heat treatments for dried fruits and nuts, we used a heating block system developed by Washington State University to identify the most heat-tolerant life stage of red flour beetle, Tribolium castaneum (Herbst), and to determine its thermal death kinetics. Using a heating rate of 15 degree C/min to approximate the rapid heating of radio frequency treatments, the relative heat tolerance of red flour beetle stages was found to be older larvae > pupae and adults > eggs and younger larvae. Lethal exposure times for temperatures of 48, 50, and 52 degree C for the most heat-tolerant larval stage were estimated using a 0.5th order kinetic model. Exposures needed for 95% mortality at 48 degree C were too long to be practical (67 min), but increasing treatment temperatures to 50 and 52 degree C resulted in more useful exposure times of 8 and 1.3 min, respectively. Red flour beetle was more sensitive to changes in treatment temperature than previously studied moth species, resulting in red flour beetle being the most heat-tolerant species at 48 degree C, but navel orangeworm, Amyelois transitella (Walker), being most heat tolerant at 50 and 52 degree C. Consequently, efficacious treatments for navel orangeworm at 50-52 degree C also would control red flour beetle.
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Details
- Title
- Thermal Death Kinetics of Red Flour Beetle (Coleoptera: Tenebrionidae)
- Creators
- J A JohnsonK A ValeroS WangJ Tang
- Publication Details
- Journal of economic entomology, Vol.97(6), pp.1868-1873
- Academic Unit
- Biological Systems Engineering, Department of
- Identifiers
- 99900547273501842
- Language
- English
- Resource Type
- Journal article