We have gathered rice grain and bran from conventional mills and RPC(Rice Processing Complex) for the survey of stored grain insect pests. Maize weevil(Sittophilus zeamais) is the dominant species among the stored grain insect pests of the rice grain and bran. Under three constant temperatures, 15, 20 and 25℃, developmental periods from egg to adult were 43.0, 37.5 and 29.2 days, respectively. With egg periods being 9.6, 7.3 and 5.2days, and larval periods being 25.2, 21.8 and 19.8days, and adult periods being 126.1, 110.3 and 108.6days, respectively. The adults of Maize weevil feed basically on the same the foods as the larvae but not as restricted in their diets because the larvae need to develop inside whole grains. Feeding of S. zeamais adult usually began 3∼4 days after emergence at 25℃. Then adult feeding ca. one rice a day, reaching a peak of 20∼40days after emergence.

• Geon-Hwi Lee(Department of Rice and Winter Cereal Crop, NICS, RDA)
• Chae-Hoon Paik(Department of Rice and Winter Cereal Crop, NICS, RDA)
• Tae-Hwan Noh(Department of Rice and Winter Cereal Crop, NICS, RDA)
• Hyeong-Kwon Shim(Department of Rice and Winter Cereal Crop, NICS, RDA)