Toxicity of spinosad on adults of Sitophilus oryzae (Linnaeus), Sitophilus zeamais( Motschulsky ) , Rhyzopertha dominica (Fabricius), Tribolium castaneum (Herbst), Oryzaephilus surinamensis (Linne), Cryptolestes ferrugineus (Stephens), Liposcelis entomophila (Enderlein) and Liposcelis bostrychophila (Badonnel) was investigated by the FAO standard method——filter paper method,and compared with the Avermectin、Osthole and Pirimiphos-methyl. Phosphine resistance strains of S. oryzae, R. dominica and T. c...