The Certified Plant Diagnostician (CPD) is intended to recognize your skill and ability in diagnosing plant problems. It is not required to take the  Certified Nursery Professional exam prior to the CPD.

“Pests of Landscape Trees & Shrubs” by Steve H. Dreistadt, and “A Systematic Approach to Diagnosing Plant Damage” by Green, Maloy and Capizzi are the official training manuals for Idaho’s advanced Certified Plant Diagnostician.