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Colorado State - Forest Service - Forest Pest Management
Information sheets on forest pests management (many in PDF format) available from the Colorado State University Cooperative Extension.
Forest and Shade Tree Pathology
Online textbook, news and upcoming meetings of forest pathology.
Focus on Woody Plant Diseases
Information by host plant on diseases and damages affecting trees and perennial flowers from the University of Illinois Extension.
Dutch Elm Disease Information
This site provides information about Dutch elm disease and ELMguard - a new experimental preventative treatment being developed at the University of Toronto, Faculty of Forestry.
Invasive and Exotic Species of North America
Provides extensive information on all kinds of invasive species in North America.
Tent Caterpillars
The Eastern tent caterpillar affects black cherry trees and other fruit and shade trees. The forest tent caterpillar infests hardwood trees such as sugar maple and oak.
US Forestry Service Pest Alerts
Collection of forest and tree health publications and fact sheets, primarily for midcontinent North America.
Asian Longhorned Beetle
Brief account of the introduction of this Chinese insect into North America, and with a list of the affected species.
University of California Cooperative Extension Sudden Oak Death
Provides practical information on this disease including history, hosts and symptoms, ecology, control and management, recent publications and events.
Plant disease diagnostics (Minnesota)
Plant disease diagnostics by the University of Minnesota Extension Service. Mainly designed for plant disease problems in yards and gardens. It is based on visual observations of symptoms. It has a section on trees that might be useful in forestry.
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