A STUDY OF LETHAL EFFECT OF PURE N_2 ATMOSPHERE TO STOSTORED GRAIN INSECT

This study conducted a bioassay to major stored grain pests under extreme pure N2,30℃±1℃ and 75%±5%RH atmosphere.LT50 values of maize weevil(Sitophilus zeamais Motschulsky),rice weevil(Sitophilus oryzae(Linnaeus)),large grain borer(Rhyzopertha dominica(Fabricius)),red flour beetle(Tribolium castaneum(Herbst))(Zhongshan strain),confused flour beetle(Tribolium confusum Jacquelin du Val),red flour beetle(Tribolium castaneum(Herbst))(Yiyang strain),book louse(Liposcelis bostrychophila Badonnel) and saw flour beetle(Oryzaephilus surinamensis(Linnaeus)) are 34.0h、32.5h、32.5h、13.9h、13.4h、12.5h、5.4h and 5.1h.Which mean a great variety of tolerance of different insects to this low O2 atmosphere.