Developmental period of Trogoderma variabile can be affected by many factors. The larvae of Trogoderma variabile enter diapause in unfavorable conditions. In this study, a comparison will be made between feeds (wheat flour, mixture of wheat flour and bran, dried pollack) and humidity (15%, 60%) in the same temperature (30℃ ±0.5) for 6 months. In the results, there are differences between feeds. Feeding mixture of wheat flour and bran was the shortest developmental period. Feeding dried pollack took few months to emerge, although we could not observe emergence for wheat flour. Even though humidity makes differences for feeding dried pollack, there were no significant differences for mixture on the different humidity. From that results, we could assume that the strongest affect on the developmental period is feeding material. Additionally, depends on feeding material, the other factors may affect on the developmental period.

• Minsug Bang(Division of Environmental Science & Ecological Engineering, Korea University)
• Yong Shik Chun(Institute of Life Science and Natural Resources, Korea University)
• JaHyun Na(Institute of Life Science and Natural Resources, Korea University/HIPOS R&C Co., Ltd.)
• Kijong Cho(Division of Environmental Science & Ecological Engineering, Korea University)