Losses caused by Sitophilus oryzae (L.), Rhyzopertha dominica (F. ), and Sitotraga cerealella (Olivier) in 5 commercial varieties of rough rice from the Southern United States were assessed as weight loss of rough rice, loss of milling yield, and loss of monetary value. Over 3 insect generation, S. oryza caused the least damage, probably because this species requires grains with gross hull defects and the proportion of such grain was relatively small. Damage attributable to S. cerealella or R. dominica was approximately equal. The varieties Vista and Lebonnet were the most susceptible and the variety Dawn the most resistant after 3 generations.