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Posted 29 August 2006. PMN Crop News.

City Trees Blighted by Plant Disease and Environmental Stresses

The American Phytopathological Society.

St. Paul, MN (July 10, 2006) – Plant diseases and environmental stresses are impacting the health of trees growing in urban communities, say plant pathologists with The American Phytopathological Society (APS).

According to Daniel Collins, plant pathology professor, Urban Forestry Program, Southern University Agricultural Research and Extension Center, Baton Rouge, LA., a number of well-known plant diseases, such as Dutch elm disease, dogwood anthracnose, powdery mildew, oak wilt, and emerging diseases, such as sudden oak death, continue to threaten the health and vitality of urban trees in the U.S. and Canada. Environmental stresses such as flooding, wind damage, drought, pollution, and insect pests such as the Asian longhorned beetle also harm the health of urban trees.

“The urban forest is vital to a community’s economic, ecological, and social well-being,” said Collins. “Urban trees improve air and water quality, protect watersheds, and provide a habitat for wildlife. We need to be aware of the wide range of issues that are affecting the health of urban forests in the U.S. and Canada and how we can manage them,” Collins said.

The latest research on plant diseases and other issues affecting the health of urban trees and forests will be presented during the Urban Forestry Health Management symposium held July 31 from 8-11:30 a.m., during the joint meeting of The American Phytopathological Society, Canadian Phytopathological Society, and the Mycological Society of America. The joint meeting will be held July 29–August 2, 2006, at the Centre des Congrès de Québec, Québec City, Québec, Canada.

More information on the meeting is available at Members of the media are extended complimentary registration to the annual meeting. To register, contact Amy Steigman at or +1.651.994.3802.


Amy Steigman
American Phytopathological Society