See also:
Asian Longhorned Beetle Brief account of the introduction of this Chinese insect into North America, and with a list of the affected species. http://www.asian-longhorned-beetle.com
Brown Spruce Longhorn Beetle Brief account of this pest of spruce trees, its growth, and means of control. http://www.brown-spruce-longhorn-beetle.com
California Oak Mortality Task Force Task force focusing on the pathogen causing Sudden Oak Death disease through research, management, education and public policy. http://www.cnr.berkeley.edu/comtf/
Dutch Elm Disease Provides information on this disease caused by Ophiostoma ulmi, its host plants, symptoms and recommendations. http://www.hfrr.ksu.edu/DesktopModules/ViewDocument.aspx?DocumentID=1619
Focus on Woody Plant Diseases Information by host plant on diseases and damages affecting trees and perennial flowers from the University of Illinois Extension. http://www.urbanext.uiuc.edu/focus/
Forestry Images Quality photographs of forest insects and disease organisms. Contains image search or browse by categories. http://www.forestryimages.org/
Gypsy Moth A short account of this caterpillar pest of maples, oaks and elms. http://www.gypsy-moth.com
Gypsy Moth in North America Extensive information on the biology, impact, distribution and management of this exotic insect in North America. http://www.fs.fed.us/ne/morgantown/4557/gmoth/
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. http://www.cfl.scf.rncan.gc.ca/collections-cfl/home.html
Iron Chlorosis in Trees The symptoms, diagnosis and correction of this condition. [PDF] http://www.oznet.ksu.edu/library/FORST2/MF718.PDF
Iron Chlorosis on Trees Provides information on this condition, the most susceptible trees and recommendations for treatment. http://www.oznet.ksu.edu/dp_hfrr/extensn/problems/irnchlor.htm
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 http://www.fzi.uni-freiburg.de/InsectPestKey-long%20version/index.htm
Monitoring Sudden Oak Death Created by the University of California's Sudden Oak Death Research Team, this site monitors the distribution of the disease. http://kellylab.berkeley.edu/SODmonitoring/
Oak Wilt Information on this disease caused by the fungus Ceratocystis fagacearum, its hosts, symptoms and recommendations for control. http://www.hfrr.ksu.edu/DesktopModules/ViewDocument.aspx?DocumentID=1673
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. http://www.biology.ed.ac.uk/research/groups/jdeacon/microbes/heterob.htm
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. http://www.extension.umn.edu/projects/yardandgarden/diagnostics/
Problem: Galls Provides information on these abnormal growths caused by insects and recommendations on control. http://www.hfrr.ksu.edu/DesktopModules/ViewDocument.aspx?DocumentID=1634
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. http://www.sedelmeierforestryresearchfund.org/index.html
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. http://www.tent-caterpillar.com
USDA Forest Insect and Disease Leaflets USDA technical publications that address specific tree pests and diseases, including identification and control. http://www.na.fs.fed.us/spfo/pubs/fidlpage.htm