Abstract:

The carrying microorganism position and the structure of mycangium of Dendroctonus armandi Tsai et Li, the most destructive bark beetle in Qinling and Bashan Mountains were studied. The results showed that the mycangia of the adult D. armandi consisted of the pronotal intergumentary cavities and spines, the spores of Leptographium terebrantis and \%Ophiostoma minus\% were the main spores carried by the mycangia of D. armandi, and they were inoculated into xylem of the host trees, while the beetle infested healthy host tree. Because there were no specialized mycetocytes and carried fungi structure in endobody of D. armandi, any hyphae specialized appressorium or sucher structure in the fungi, the fungi were attached to the alimentary canal of D. armandi, and the alimentary canal of D. armandi was not the stocked and transported fungi spores areas. D. armandi was not depended on the alimentary canal to carry and transport the fungi.

Key words: Dendroctonus armandi, Mycangium, Fungi