The study of extracellular proteins and combination of enzymes of Dendroctonus armandi adult insects gut and its symbiotic fungus in the Qinling Mountains results showed that there were cellulase,hemicellulase,amylade,protease and esterase in the secretions of Dendroctonus armandi , whereas cellulase,hemicellulase,amylase,protease,esterase and laccase can be detected in symbiotic fungus At the same time,isoenzyme zymogram showed that cellulase,amylase,protease,esterase from symbiotic fungus and fro...