Protein and Quality Characterization of Pegaso Wheat Near-Isogenic Lines

Susceptibility of Lasioderma serricorne (F.) (Coleoptera: Anobiidae) Life Stages to Elevated Temperatures Used During Structural Heat Treatments Authors: C. Yu, B. Subramanyam, P.W. Flinn, J.A. Gwirtz Submitted to: Journal of Economic Entomology Methyl bromide is still widely used in food processing and storage facilities for the suppression of storedproduct insect pests, but its use is scheduled to be phased out as part of the Montreal Protocol. Little information is available on the response of the cigarette beetle, Lasioderma serricorne (F.), a pest associated with food-processing facilities, to elevated temperatures. Heat treatment of food-processing facilities involves using elevated temperatures (46 to 60°C for 24 h) for management of stored-product insect pests. In collaboration with scientists at Kansas State University, we evaluated stage-specific susceptibility of L. serricorne to elevated temperatures in order to identify the most heat tolerant stage. Exposure of eggs, larvae, pupae, and adults to 46, 50 and 54°C, in the laboratory indicated the egg stage to be the most heat-tolerant. The lethal time to kill 99% of eggs at 46°C was 605 min; it decreased to 190 min at 50°C, and 39 min at 54°C. Therefore, during structural heat treatments, eggs should be used in bioassays for gauging the effectiveness of heat treatments, because treatments aimed at controlling the egg stage should control all other life stages of L. serricorne. Contact Paul Flinn, telephone 785-776-2707, email [email protected]