Authors: Jennifer Parke, Jay Pscheidt, Richard Regan (Oregon State University); Jan Hedberg (Oregon Department of Agriculture); Niklaus Grunwald (USDA ARS)

In this course, you will learn about Phytophthora so that you can reduce the risk of Phytophthora disease in your nursery. The course is divided into three modules:

Module 1: Biology, Symptoms, and Diagnosis

Module 2: Disease Management

Module 3: Phytophthora ramorum

It is best to go through each module in order. Each module should take 1-2 hours to complete, although you may start and stop as often as you like. A glossary of scientific words is accessible from anywhere in the course. There are practice questions at the end of each module so you can test yourself on what you have learned.  There are also links to further information.

The course is free and open to the public.

Further Information

Glossary