The seasonal occurrence of Curculio sayi was investigated on a farm near Glasgow, Missouri. Twenty seven cone traps were placed underneath the canopy of six chestnut trees beginning in May 2005. Traps were monitored weekly throughout the summer and fall for emerging weevils. In order to determine the larval tunneling depth used for winter diapause and pupation, 15 PVC-sectioned piping retainment cages were buried to monitor the larval movement of C. sayi. A subset of 5 soil-depth apparatuses were removed each season beginning in December 2005 and soil was examined for weevil presence, life stage, and survivorship.