Pests and Diseases

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

Bugwood Network, The University of Georgia
Extensive resource on forest insects and related topics.
http://www.bugwood.org/

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

Exotic Forest Pest Information System for North America
Database containing information on exotic insects, mites and pathogens with potential to cause significant damage to North American forest resources.
http://spfnic.fs.fed.us/exfor/

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/

Forest and Shade Tree Pathology
Online textbook, news and upcoming meetings of forest pathology.
http://www.forestpathology.org/

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

Invasive and Exotic Species of North America
Provides extensive information on all kinds of invasive species in North America.
http://www.invasivespecies.gov/

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

University of California Cooperative Extension: Sudden Oak Death Facts
Provides practical information on this disease including distribution, symptoms, prevention, quarantines and look-alike diseases.
http://news.ucanr.org/newsstorymain.cfm?story=439

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