The effect of heat treatment on losses of different life stages for Tribolium confusum Duval (Coleoptera: Tenebrionidae)

Abstract :

Tribolium confusum Duval is an important pest of food processing technology in the world. The use of elevated temperatures or heat shock treatments is a very effective method for managing storage pests. In this study in order to evaluate the mortality of this insect by the use of elevated temperatures, effects of five constant temperatures including 35, 45, 50, 55 and 60°C for 5, 10, 15, 20 and 30 minutes have been studied on different developmental stages of this pest (5-day larvae, 15-day larvae, pupae and adult). After heating, the samples were kept under temperature of 28±1°C and relative humidity of 65±5%. Results indicated the most susceptive and the most heat-tolerant stage of the insect’s growth were respectively related to the 15-day larvae and pupal stage. Furthermore, it was revealed that the minimum controlling temperature for the 5-day and 15-day larvae is 50°C and for pupae and adult insects is respectively 55°C and 50°C. These results provides, considering the possibility of pest’s existence in different developmental stages in an infected mass, 55 °C for 15 minutes would be effective for managing and controlling life stages of Tribolium confusum

Keyword :

Tribolium confusum, heat treatment, developmental stages

Author(s) : Ioni, S., Moarefi, M., Karahrodi, R. H.
Downloads : 1913
Published Issue : 2012 Vol. 7 Number 1

2012 Vol. 7 Number 1