OSU Extended Campus

Oregon State University Extended Campus

Phytophthora Online Course: Training for Nursery Growers

OSU now offers this online course for nursery growers

Leaf spots on camellia Offered through OSU Extended Campus in partnership with the Oregon Department of Agriculture, this online course provides training about Phytophthora, so that you can reduce the risk of Phytophthora disease in your nursery.

Certain species of Phytophthora cause important diseases of agricultural crops and forests as well as nursery crops. Phytophthora disease is the number one disease of nursery crops nationwide. Notorious Phytophthora diseases include sudden oak death, ramorum blight, and rhododendron root rot.

The course is divided into three modules:

  • Biology, symptoms, and diagnosis
  • Disease management
  • Phytophthora ramorum

It is best to go through each module in order. Each module should take 1 to 1.5 hours to complete, although you may start and stop as often as you like. There are practice questions at the end of each module so you can test yourself on what you have learned. To see for yourself, preview the Phytophthora Online Course now.

Course Fee and Certificate

The course is free, but an optional online exam is avaliable for $100. If you pass the test, you will receive a Certificate of Mastery on Phytophthora from Oregon State University Extended Campus.  If interested, complete our Phytophthora Exam Registration Form

Registration & Getting Started

Your may access the Phytophthora Online Course and take the online exam at any time after you have submitted the Phytophthora Exam Registration Form. The exam is hosted in Blackboard; please review the section on Technical Help for assistance with Blackboard. If you have any questions, please call 800-667-1465 or email ecampus@oregonstate.edu.









Oregon State University Extended Campus
4943 The Valley Library, Corvallis, OR 97331-4504
800-235-6559 | 541-737-2676
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