Phosphine slow releasing fumigation was conducted by means of wrapping aluminium phosphide tablets with polyethylene film at the application rate of 3.39/m~3 in a plastic sheeted wheat stack for long term exposure. The infest B. tarsalis (Berlese), C. malaccensis Oudemans, C. trouessarti Oud. and tested species of T. tropicus Roberstom,,L destructor (Schrank), S. medanensis Oudemans, G. fusca (Oudemans ), C. eruditus (S. ), C. malaccensis, C. trouessarti were completely killed. But at the same conditions t...