Successful grain storage requires an essential grain fumigation process to achieve effective insect control and help prevent phosphine resistance in stored grain. Ben White and Chris Warrick from GRDC’s Grain Storage team explain best-practice phosphine fumigation, including the importance of gas-tight, pressure-tested silos, correct phosphine dosage calculations, exposure periods, residue management, ventilation requirements, and withholding periods. Whether you’re managing wheat storage, grain silos, or on-farm grain storage facilities, this practical guide provides valuable advice for successful grain fumigation, stored grain pest management, and maintaining grain quality.