How to Identify Crown Root Gall

Inspect the plant or tree closely. Look for signs of growth stunt, wilt and dieback resulting from the root system’s infection. Inspect for weakened or drooping stems and branches which also result from the gradual dieback of the root system. Inspect the branches and stems for gall developments and tissue deformities.

Inspect the base of the tree or plant for signs of gall development. Look for deformities on and around the trunk and base of the plant or tree. Inspect the surrounding soil near the root system as you may be able to see galls developing on the roots nearest the soil’s surface. Look for soft, yellow-colored formations, as well as hard, dark-colored formations, as the young yellow galls harden and darken with age.

Remove potted plants and trees from their containers and inspect the roots directly for crown gall symptoms. Remove the excess soil from the root mass, if necessary. Cut away infected roots with sharp, sterile shears. Sterilize the shears between each cut to prevent spreading the infection to healthy roots.

Remove the galls from the tree or plant with sharp, sterile shears. Cut back infected branches and stems and carve off galls from the base or trunk of the infected tree. Discard severely infected plants and trees, as there is no effective cure or chemical treatment for crown gall infections.

Keep the planting area of your plants and trees free of debris and defoliation to reduce the development of infectious crown gall bacteria spores. Avoid planting susceptible plants and trees in locations where crown gall infections have been identified. The bacteria can survive for several years in the soil without a host.