How can I tell the difference between drought stress and bark beetle infestation?
Bark beetle infested tree foliage turns straw-colored in at least one section of the tree or quite often the whole tree. Pitch tubes are often present on attacked trees and appear as white or red pieces of sap on the outside of the tree. Some suggest this appearance is as if the tree is attacked by bubblegum. Only a few of these in the top of a tree need to be present and often binoculars help find the pitch tubes.
