Terminal growth and some laterals may be killed. No chemical control is listed. Pine Twig Blight caused by the fungus Cenangium ferruginosum is a problem on stressed trees. The fungus will not ordinarily be a problem unless the host plant is weakened. The infection usually begins at the terminal bud near a branch tip.
Infection takes place in late summer and the disease progresses down a twig into a node.
At times the infection may go into 2 year old wood. Needles on infected branches turn reddish then die. Cut off and destroy infected twigs. No chemical control is listed. Several rusts attack firs but are not a problem on landscape trees.