Fumigation should be conducted only by trained, experienced, registered applicators. If insects are found above the suggested thresholds, fumigation is suggested. The goal of fumigation is to maintain a toxic concentration of gas long enough to kill the target pest population. The toxic gases penetrate into cracks, crevices, the commodity, and the facility treated. Fumigants provide no residual protection. Fumigants come in several forms and formulations. All label instructions and precautions should be read and carefully followed.
Fumigant selection should be based on the following factors: pest susceptibility, volatility, penetrability, corrosiveness, safety, flammability, residues, odors, application method, required equipment, and economics. Two products remain for treating stored products: methyl bromide and phosphine-producing materials, such as magnesium phosphide and aluminum phosphide.
