California Oak Mortality Task Force - Task force focusing on the pathogen causing Sudden Oak Death disease through research, management, education and public policy..
Dutch Elm Disease - Provides information on this disease caused by Ophiostoma ulmi, its host plants, symptoms and recommendations..
Focus on Woody Plant Diseases - Information by host plant on diseases and damages affecting trees and perennial flowers from the University of Illinois Extension..
Forestry Images - Quality photographs of forest insects and disease organisms. Contains image search or browse by categories..
Gypsy Moth - A short account of this caterpillar pest of maples, oaks and elms..
Gypsy Moth in North America - Extensive information on the biology, impact, distribution and management of this exotic insect in North America..
Insects and Diseases of Eastern Canada's Forests - An extensive collection of images and a variety of information on the main insects and diseases of the forests of Quebec and Eastern Canada..
Iron Chlorosis on Trees - Provides information on this condition, the most susceptible trees and recommendations for treatment..
Key to the Forest Insect Pests of Papua New Guinea - Allows the identification of the most important forest insect pests of Papua New Guinea and includes descriptions of insect signs, preventive measures, bibliographic references and a comprehensive glossary of terms.
Monitoring Sudden Oak Death - Created by the University of California's Sudden Oak Death Research Team, this site monitors the distribution of the disease..
Oak Wilt - Information on this disease caused by the fungus Ceratocystis fagacearum, its hosts, symptoms and recommendations for control..
Pine Root Rot: A Biocontrol System - Information on the use of the weakly parasitic fungus, Phlebiopsis gigantea, to prevent the attack of the pathogenic fungus, Heterobasidion annosum..
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..
Problem: Galls - Provides information on these abnormal growths caused by insects and recommendations on control..
Sedelmeier Forestry Research Fund - Provides funding for critical research into the causes, control, prevention, and the eventual elimination of some of the diseases that affect the trees of our forests..
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..
