TY - JOUR T1 - Problems Affecting Urban Trees in Quebec City JF - Arboriculture & Urban Forestry (AUF) SP - 167 LP - 169 DO - 10.48044/jauf.1983.041 VL - 9 IS - 6 AU - Dery Rocray AU - et Associes Y1 - 1983/06/01 UR - http://auf.isa-arbor.com/content/9/6/167.abstract N2 - The study of approximately 5,000 trees growing in the Quebec City area permitted the identification of the major problems related to the urban environment. These trees include ornamentals, those they grow along streets, and those in urban parks and woods. The results show that abiotic diseases are far more important and cause much greater damage than biotic diseases. ER -