Plant Clinic References

OSU Online Resources for Master Gardener Plant Clinics

General OSU Extension Gardening Information

PNW Handbooks: The PNW Handbooks are the source for many Master Gardener recommendations - particularly those that involve a recommendation for chemical control. 

Plant Identification

Weed and Moss Management

  • Methods of Moss Control an excellent resource about how to control moss in trees and shrubs, lawns, and on decks, sidewalks, etc.  Emphasis on physical methods and least-toxic chemical treatment.

Insect / Arthropod Identification and Management


Plant Disease



OSU Campus-Based Resources


Other Resources on Plant Diseases:

Interactive Plant Manager Cornell University's IPM tool will help you diagnose, monitor, treat, and prevent pest problems.