My well established bottle brush trees are starting to die. Limbs and leaves are dying. The leaves that aren't completely dead yet looks to have some sort of fungus or something on them. There are brown spots on the green part of the leaf and the tips start to turn white. What is this and how can I treat it?
Certified GKH Gardening Expert
hytophthora root rot is a disease that infects bottle brush plants that have been exposed to overly moist soil conditions. Under wet conditions, the fungus that causes root rot grows rapidly and infects the root systems of surrounding plants. Symptoms of infection include the yellowing of leaves, early defoliation, reddish-brown roots that are brittle to the touch, the die back of branches and the discoloration of branches or the trunk of the plant. In severe cases, root rot can kill the bottle brush plant.
The best method of control is to prevent the soil below the plant from becoming overly saturated in the spring and summer months. The application of fungicides available at local garden centers has also been effective in treating this disease. Apply fungicides per manufacturer instructions.