The following resources are part of Cornell University.
- Bailey Hortorium (Plant identification, Dept. of Plant Biology)
- Plant Disease and Nematode ID at the Plant Disease Diagnostic Clinic
- Soil and Leaf Tissue Nutrient Analysis at the Cornell Nutrient Analysis Laboratories
Interactive Plant Manager... an online tool for diagnosing pests of woody ornamental plants.
For insect identification, contact the Insect Diagnostic Lab (Dept. of Entomology).
For identification of insects on livestock, see the Arthropod Identification (Veterinary Entomology, Cornell University)
For soil and tissue testing, see Agro-One Services
If you need assistance with the identification of diseases, insects, chemical injury and physiological disorders that affect berry crops in northeastern North America and eastern Canada, access The Berry Diagnostic Tool.
Diagnosing Vegetable Problems By: Dr. Steven Reiners, Dept of Horticultural Science, Cornell University. "What's wrong with these plants?" is a phrase gardeners ask themselves every summer. Often, with a little common sense and some keen observation, it is easy to find the answer. This site is a guideline that home gardeners may find useful in diagnosing problems.
If you have pest problems with Fruit Trees or Shade Trees, you may be able to diagnose the problem yourself with the aid of this website: West Virginia University's Kearneysville Tree Fruit Research and Education Center
For aid in the identification of common weeds and weed seedlings found throughout Virginia and the Southeastern U.S.:
Weed Identification Guide from Virginia Polytechnic Institute and State University.
For more assistance in diagnosing your problem, or to confirm your own diagnosis, contact your local County Extension Agent.