Susceptibility of Tribolium castaneum life stages exposed to elevated temperatures during heat treatments of a pilot flour mill: influence of sanitation, temperatures attained among mills floors, and costs

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dc.contributor.author Brijwani, Monika
dc.contributor.author Subramanyam, Bhadriraju
dc.contributor.author Flinn, Paul W.
dc.contributor.author Langemeier, Michael R.
dc.contributor.author Hartzer, Michelle
dc.contributor.author Hulasare, Rajshekhar
dc.date.accessioned 2012-06-11T19:45:33Z
dc.date.available 2012-06-11T19:45:33Z
dc.date.issued 2012-06-11
dc.identifier.uri http://hdl.handle.net/2097/13925
dc.description.abstract The influence of sanitation on responses of life stages of the red flour beetle, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae), was investigated in a pilot flour mill subjected to three, 24-h heat treatments by using forced-air gas heaters fueled by propane. Two sanitation levels, dusting of wheat flour and 2-cm-deep flour, were created in 25 plastic bioassay boxes, each holding eggs, young larvae, old larvae, pupae, and adults of T. castaneum plus two temperature sensors. Data loggers (48) were placed on the five mill floors to record air temperatures. The time required to reach 50°C, time above 50°C, and the maximum temperature among mill floors and in bioassay boxes were measured. The maximum temperature in bioassay boxes and in the mill was lower on the first floor than on other floors. This trend was apparent in time required to reach 50°C and time above 50°C, especially in compartments with 2-cm-deep flour. The mean ± SE mortality of T. castaneum life stages on the first floor was 55.5 ± 12.9–98.6 ± 0.8%; it was 93.2 ± 6.7–100 ± 0.0% on other floors. Adults were the least susceptible stage. Mortality of T. castaneum stages in compartments with 2-cm-deep flour was generally lower than those with flour dust. Costs for the three heat treatments ranged from US$27,438 to $28,838. An effective heat treatment can be conducted within 24 h, provided temperatures on mill floors reach 50°C in 8–12 h and are held above 50°C for at least 10–14 h, with maximum temperatures held between 50 and 60°C. en_US
dc.relation.uri http://www.bioone.org/doi/abs/10.1603/EC11114 en_US
dc.rights Permission to archive granted by the Entomological Society of America, June 7, 2012. en_US
dc.subject Heat treatment en_US
dc.subject Temperature en_US
dc.subject Sanitation en_US
dc.subject Insect mortality en_US
dc.subject Economics en_US
dc.subject Tribolium castaneum en_US
dc.title Susceptibility of Tribolium castaneum life stages exposed to elevated temperatures during heat treatments of a pilot flour mill: influence of sanitation, temperatures attained among mills floors, and costs en_US
dc.type Article (publisher version) en_US
dc.date.published 2012 en_US
dc.citation.doi doi:10.1603/EC11114 en_US
dc.citation.epage 717 en_US
dc.citation.issue 2 en_US
dc.citation.jtitle Journal of Economic Entomology en_US
dc.citation.spage 709 en_US
dc.citation.volume 105 en_US
dc.contributor.authoreid sbhadrir en_US
dc.contributor.authoreid pflinn en_US
dc.contributor.authoreid mlange en_US

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