Diseases of Maple in
Eastern North America
G. W. Hudler

Maples (Acer spp.) are common trees in many North American forests and landscapes. Most commonly grown species are native, but a few (Japanese, Norway, and sycamore maples) have been introduced from other parts of the world. Within the genus, there is marked variation in leaf size, shape, and color; flower and seed structure; bark texture; and overall growth habit. Thus, species are distinguished relatively easily from one another with the aid of a tree identification book. The following species commonly found in North America are considered in this leaflet. The common name is followed by the abbreviation used in this bulletin and the scientific name.

As diseases are discussed here, the name of each disease is followed by names of one or more pathogens and those, in turn, are followed by abbreviations of species that are hosts for that pathogen.

Leaves | Bark | Vascular Systems | Roots | Wood Decay | Noninfectious Diseases

Cornell Cooperative Extension Publication
Cornell Tree Pest Leaflet A-13, 1984.

George W. Hudler is an assistant professor in the Department of Plant Pathology at the NY State College of Agriculture and Life Sciences, Cornell University. Photographs, courtesy of: M. Drilias, University of Wisconsin—17; G. W. Hudler—5, 11, 14, 18, 21, 26, 33, 34, 35; H. H. Lyon—2, 3, 4, 6, 7, 8, 9, 13, 20, 33, 36; W. A. Sinclair—1, 12, 15, 16, 19, 23,24, 25, 27, 28, 29, 30, 31, 32, 37.