Abstract
Bacteria were isolated from 40 cultivars of woody plants with tip dieback during 1981 and 1982. Plants most severely affected were maple (Acer spp.), dogwood (Cornus florida), filbert (Corylus avellana), blueberry (Vaccinium corymbosum), magnolia (Magnolia spp.), lilac (Syringa sp.), oriental pear (Pyrus pyrifolia), aspen (Populus tremuloides), and linden (Tilia americana). Of the 556 bacterial strains tested, 466 (84%) were fluorescent, and 303 (65%) of the fluorescent strains were identified as Pseudomons syringae.