Scouting Procedure Detection of cutworms and estimating population densities is difficult because of their nocturnal feeding habits. To estimate numbers during daylight hours it is necessary to search for larvae in soil around plants. Check a minimum of 10 square feet samples per 20 acres. Because of the seasonal occurrence of the variegated cutworm, it is important to carefully check alfalfa just prior to and immediately after first harvest. Threshold Levels and Management Control of cutworms with insecticides is much more effective, and damage to alfalfa is minimized with early detection of infestations.
Insecticides provide more effective control when larvae are small.
Because of their nocturnal feeding habits, applications should be made in late afternoon or evening with adequate spray gallonage to insure thorough coverage.