The information contained in this report was derived from tests conducted by entomologists and their coworkers. The report is not to be considered a final reference work on the application of carbon dioxide in grain storage facilities because more economical methods may be developed; however, it should serve as a guide to those who wish to use or further investigate this promising residue-free method of insect control. Each storage facility will have its own peculiarities, which include areas to seal, access ports, and other factors pertaining to the application and distribution of the CO2.