Gives a comprehensive review of the diseases of the major genera of forest and ornamental trees. An introductory chapter deals with the causes, symptoms and diagnosis of disease, and with control measures which include plant health legislation. Two chapters discuss disorders caused by non-living agencies such as frost, nutrient deficiencies and pollution, as well as diseases caused by living agencies with a wide range of hosts, for example the fungi that cause tree decay. The remaining chapters summarize the available information on the diseases of the main individual tree genera grown in Britain. Diseases of fruit tres such as those affecting the apple, pear and cherry are briefly described if they affect the ornamental forms of the fruit tree genera and species. Where possible, information is provided on distribution of the diseases, their symptoms, factors affecting disease expression, and host range and resistance, together with short descriptions of casual organisms. Control measures are suggested where appropriate and practical. The text is illustrated with photographs and drawings which depict aspects of over 100 of the diseases and disorders described. Although based principally on experience with European trees, many of the diseases occur more widely throughout the temperate regions and in areas in North America, Australia and elsewhere.