A phosphene gas fumigation system may comprise an Aluminium Phosphide rectangular prism charge, storage magazine and/or applicator which may address problems of user safety, correct application rates, flammability, volumetric efficiencies and/or commercial viability. The present Aluminum Phosphide charges are rectangular prism shaped, so as to prevent their rolling about and dangerously stacking together in use. Furthermore, the present applicator holds the charges immobile and apart. Wire mesh cages expose the charges to air and may flex to accommodate the charges which may expand while reacting. The charges and entrance ports of the applicator may be sized to prevent use of conventionally sized charges. The applicator may safely collect residue therein. Furthermore, the present storage magazine conveniently stores and loads and ejects charges and minimises air spacing therein, thereby reducing risk of flashback ignition.
