Dynamics of densities of bacteria and nematode in the branches of Pinus thunbergii inoculated with Bursaphelenchus xylophilus

Changes in densities of bacteria nematode in the branches of 3-year-old Pinus thunbergii inoculated with pine wood nematodes were observed .In the early days after inoculation , the nematodes moved slowly to other parts of the tree .Density of the nematode began to increase when the resins in the inoculated trunk decreased .The changing tendency in the percentage of the wood blocks containing bacteria was similar to the dynamics of the nematode.The densities of the nematodes and bacteria increased in accordance with pathogenic symptom development .The dominant genus of the bacterium complex was Pseudomonas .[ Ch , 3 tab .9 ref .]