The article discusses a study concerning the impact of 13 soybean varieties including 356, M4, Zane and Sahar on the nutritional indices of the cotton bollworm, Helicoverpa armigera. It is stated that the efficiency of conversion of digested food (ECD), approximate digestibility (AD) and efficiency of conversion of ingested food (ECI) values of larvae were highest on M7 and lowest on Zane. It further states that M7 variety of soybean had the highest value of consumption index (CI).