Norwegian Spruce Issue
I planted ten Norwegian spruce trees six years ago this summer. There have been no disease issues until recently. Regrettably, odd-looking brown knots have established themselves on every level of the horizontal branches. I have sprayed copious amounts of neem oil on the infected areas, but the oil appears to have no effect. What can I do to save my trees?
Cheboygan County Michigan
That is your best resource for diagnosing and treating your tree. An arborist is a certified and generally insured expert in trees and their problems. He or she can examine your tree and make recommendations regarding the health of the tree, any needed judicial pruning, and whether or not (in his opinion) it should be removed. You can find a certified arborist in your area here:
Click on "Find an Arborist" at the top of the page; then click on United States from the pull-down menu. Then enter your State and City. This should bring up a list of certified arborists nearest to you. Or you may be able to locate one under "Tree Services" in your local Yellow Pages.