A Technical Report from The Bartlett Tree Research Laboratories
Phytophthora root disease is a widespread but often overlooked disease of landscape plants. Several species of Phytophthora attack the fine-absorbing roots of plants and may invade larger roots as well as the root collar. The name, Phytophthora, is a Greek word literally meaning “plant destroyer.” These organisms grow in the cambium and sapwood causing death of the tissue. Loss of water, nutrient-absorbing capacity, and stored carbohydrate reserves in the root cause a gradual, or sometimes rapid, decline of the above-ground portion of the plant.