The effective distance of bacteriostasis of thirteen kinds of gardening trees were determined with the method of bumping dish and the medium with beef, peptone and agar,including Picea koraiensis Nakai,Sabina chinensis(L.) Ant,Populus bolleana Lauche ect.It was indicated that the effective range of bacteriostasis on defferent gardening trees were difference and Pinus tabulaeformis Carr was about 5.5 meters;Sambucus willamsii Hance,Ulmus pumila L.,Populus bolleana Lauche,Picea koraiensis Nakai,Sabina chinens...