Pitch Mass Borers attack a wide variety of pines and spruces.
The adults (which look like yellow jackets, though are moths) lay eggs
near wounds on trees, such as where a branch had been removed or where
mechanical injury occurred. After the larvae/borer hatches from the egg,
it will start boring into the wood of the tree. The tree will start dying
from the top downward and a near continuous flow of pinkish sap or pitch
can be seen running down the trunk of the tree.