Module 1: Biology, symptoms, and Diagnosis
Module 3: Phytophthora ramorum
Welcome Module 2: Disease Management Conclusion Take the Exam Further Information

Disease Triangle

Water Management

Chemical control


Practice Questions







Cultural Controls

For a printable brochure on the top 10 tips for preventing disease in your nursery using cultural controls, see Managing Phytophthora by J. Parke.

Purchase Clean Stock

Buy only clean, disease-free stock.

  • Purchase plants only from state certified suppliers (see Module 3 for details)
  • Inspect all incoming plants for symptoms of disease. Keep new shipments separate from the rest of your nursery stock until you are sure they are free of disease.
Inspect incoming plants for disease symptoms.

Inspect incoming plants for disease symptoms.

Photo by J. Hedberg.


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