Technical Abstract: The banded sunflower moth, Cochylis hospes Walsingham, is an important insect pest of cultivated sunflower. Eggs are deposited on the bracts of sunflower heads. Larvae develop through five instars within the heads and are present in fields from mid-July to mid-September. Larvae feed initially on the bracts, pollen and the disk flowers and finally the immature and mature seeds. After feeding to maturity, larvae drop to the soil below the plant and spin cocoons in the soil where they overwinter. There is one generation per year in North Dakota and the upper Great Plains. The paper describes the banded sunflower moth's life stages, life cycle, crop damage, distribution, economic injury levels, monitoring procedures, timing of control applications, and other management practices. Detailed sampling procedures using diagrams and pictures are presented based on both egg and adult sampling. Charts also are provided for determining the economic injury levels for different egg and moth densities based on treatment costs, plant population, and sunflower market price.