The influence of three temperatures, 20℃, 25℃ and 35℃ and four relative humidities (RH), 30-35%, 50-55%, 70-75%, and 90-95% on oviposition and development of Callosobruchus chinensis (L.) (Coleoptera: Bruchidae) on azuki bean seeds was investigated. One day old five males and five females of C. chinensis were introduced to 30 gm azuki bean seeds for each combination of temperature and RH, and replicated ten times. The introduced adults were allowed to lay eggs for 72 hours. Temperature significantly influenced on oviposition with increased number of eggs at 30℃, relative humidity, however, had no effect on egg laying. Development time was affected by both temperature and relative humidity. Development time was shortest at 30℃ and 70-75% RH. Adult emergence success rate was affected by both temperature and RH; increased level of temperature and RH increased emergence rate of adults. The results suggest that C. chinensis is much likely to cause greater damage to azuki bean seeds stored at 30℃ and 70-75% RH.

• Bishwo P Mainali(Department of Functional Crop, National Institute of Crop Science, RDA, Milyang, Korea)
• Soon-Do Bae(Department of Functional Crop, National Institute of Crop Science, RDA, Milyang, Korea)
• Hyun-Ju Kim(Department of Functional Crop, National Institute of Crop Science, RDA, Milyang, Korea)
• Yoon-Young Nam(Department of Functional Crop, National Institute of Crop Science, RDA, Milyang, Korea)
• In-Seok Oh(Department of Functional Crop, National Institute of Crop Science, RDA, Milyang, Korea)