Disease Fact Sheets from Other Universities and USDA
- Images of Forest Diseases
- by USDA Forest Service and Bugwood Network (University of Georgia)
- Plant Disease Picture Guide
- by Oregon State University Extension- Plant Disease Control Online guide
- Christmas Tree Diseases
- by Cornell University
- Forest Insect and Disease Leaflets
- by USDA Forest Service, NE region
- Forest Insect and Disease information
- by USDA Forest Service - NW region
- Plant Disease Fact Sheet links
- Ornamental Pathologist's Internet Guide - Favorite Web sites of Ornamental Pathologists
- Ornamental Disease Information
- by North Carolina State University
- How to Identify and Manage Needlecast Disease on Balsam Fir
