Cooley Spruce Gall- These pests are more of an esthetic pest then harmful. Although in severe infestation they can cause branches and limbs to die back and will weaken the tree making it more suseptable to attack by other pests and diseases
Ips Beetle- The Ips Beetle is another bark beetle that will infest pine trees. Unlike the Mountain Pine Beetle the Ips will attack trees from the top down, With the Mountain Pine Beetle killing trees from the bottom up.
Mistletoe- Unfortunately Mistletoe can not be cured. It infests new trees when the pods explode and attach to new trees in the area. Trees can live a very long time with Mistletoe but you should cut out any affected limbs to prevent further spread.