01820nas a2200217   4500008004500000020001400045245013700059210006900196260000900265300001200274490000700286520103700293653002201330100001901352700002801371700001701399700001901416700001801435700001401453856013501467       2008                        Engldsh    a0022-474X00aCalorimetric evaluation of responses of Sitophilus oryzae and Tribolium confusum to elevated temperatures and controlled atmospheres0 aCalorimetric evaluation of responses of Sitophilus oryzae and Tr  c2008  a295-3030 v443 aMetabolic heat rates, determined by microcalorimetry, were used to measure the effect of controlled atmospheres (CAs) and elevated temperatures on the stored-product insects Sitophilus oryzae (rice weevil) and Tribolium confusum (confused flour beetle). Results for larval and adult stages in air, and in a range of low O2 and/or high CO2 CAs, at temperatures from 15 to 45 [degree]C, showed the general effectiveness of such atmospheres in lowering the lethal temperatures relative to those in air. Effects on adult S. oryzae at 25 [degree]C were explored in more detail in experiments using the following conditions: exposure to anoxic CAs for extended times; exposure to hypoxic CAs; and simulated hermetic storage. A simple scanning calorimetric method was developed for determining lethal temperatures and a combined thermo-gravimetric and differential thermal-analysis method Was used to interpret the thermal events, due to loss of water, occurring at and above these temperatures. (C) 2008 Elsevier Ltd. All rights reserved.10aSitophilus oryzae1 aDownes, C., J.1 avan Epenhuijsen, C., W.1 aLill, R., E.1 aDownes, J., E.1 aCarpenter, A.1 aBrash, D.  uhttps://weevil.myspecies.info/calorimetric-evaluation-responses-sitophilus-oryzae-and-tribolium-confusum-elevated-temperatures-and