Links

University of Wisconsin Plant Pathology Master Gardener Training
http://www.plantpath.wisc.edu/PDDCEducation/MasterGardener/General/TofC.htm

Tree Plant Disease Images
http://www.forestryimages.org/diseases.cfm
Categories:
Root and Butt / Root and Stem Diseases
Stem Decays and Cankers
Foliage Diseases
Vascular Wilts
Stem and Leaf Rusts
Broom Rusts
Unknown Biotic Damage Agent
Diseases of Insects
Misc. Fungi

Ohio State Online Master Gardener Training
http://www.hcs.ohio-state.edu/mg/manual/path.htm#z

Plant Diagnosis
http://www.apsnet.org/education/IntroPlantPath/Topics/plantdisease/top.htm


Texas A&M Uvalde
http://uvalde.tamu.edu/STAFF/MG%20outline.htm