Avoid feeding with high nitrogen fertilizers as it seems to worsen the condition of infected trees. Beech bark disease occurs when the feeding site of woolly beech scale is invaded by the fungus nectria coccinea var faginata. The fungus kills the bark and in the process, the insects. There are no satisfactory controls for the fungus. Control the disease by controlling the scale with a dormant spray of lime sulfur.
Cankers infect, girdle, and kill branches.
There is no chemical control. Prune out the infected branches. During periods of high temperatures and low rainfall beech may scorch. Make sure trees are adequately watered. This information is for educational purposes only.