Causal Agent

The fungus Cronartium quercuum 

 

Hosts

Many pine species. 

 

Symptoms

Fusiform rust can be a lethal disease of loblolly or slash pines that have been infected when they were young. Elongated swelling appear in the infected areas of the pine. Then, the infected trunks or branches break open, exposing the dusty orange rust spores. These spores will infect oak leaves, although the disease is not likely to be detected and does not harm the oaks significantly.

Control

This is not a common disease of trees in landscapes. No disease control is available. Please contact your local county extension office for current information