How to Manage Root Rot in Fruit, Nut, and Landscape Trees and Shrubs

Tree roots infected with root rot.

Phytophthora and the fungi Armillaria, Phymatotrichum, and Xylaria can all cause devastating cases of root rot on fruit, nut, and landscape trees along with woody shrubs. Prevention is the best way to manage these diseases. Read on to learn the best ways to avoid these diseases and biocontrol agents and fungicides that may help with Phytophthora root rot.

How to Identify and Control Cotton Root Rot in Fruit and Nut Trees

Dead fruit trees killed from cotton root rot (Phymatotrichum omnivorum) in an orchard setting.

Cotton root rot infects more than 2,300 plant species in the southwest, including apples, peaches, almonds, and most other fruit and nut trees. While the disease is usually fatal, there are some steps you can take that might save your tree. Read on at Gardener’s Paths to find what to do if your tree has this disease.

How to Identify, Prevent, and Treat Gummosis on Fruit Trees

Close up of gummosis on an apricot tree trunk.

Is your apricot, peach, plum, cherry, or apple tree oozing a lot of gum? If so, it may be infected with the fungus Leucostoma that causes apricot gummosis and cankers. This fungus only infects stressed trees and enters through wounds, so you may be able to avoid it entirely. Read more about how to prevent this disease and ways to treat it.