Study on the Spreading of Pine Wood Nernatode through Pine Wood Chips

The test on the spreading of pine wood nematode through wood chips was carried out in the Pacific Forestry Centre of Canada in 1988. The results show that the nematode can go out from the chips to cause pine seedling wilt and wounds are very important for this. One population of pine wood nematoes from Ontario can cause the seedlings wilt without any wounds. This phenomenon gives evidence that pine wood nematodes can panetrate immediately from roots or stem base of seedlings. The pathogenicity of populations from different locations is different.