Prevention is the first step. Inspect all grains upon purchase, freeze grains for at least 1 week (or store permanently in the freezer) to kill any eggs. Buy grains in small quantities and eat within a reasonable period. Store grains in tightly sealed glass, metal, or sturdy plastic containers (not bags). Regularly clean pantry cracks, crevices, and shelves. Eliminate the source - discard any infested foods. Grain weevils can bore through plastic and cardboard so inspect everything thoroughly. Vacuum pantry shelves, cracks, and crevices, then wipe shelves down with a mild detergent and water. Dispose of garbage and vacuum bags outside, away from the home, and monitor for more activity.