Unfortunately, we don't really have the resources to go out and examine individual trees; the demand is just too high! We have two options. The first is to upload several high quality photos here, one showing the unhealthy tree alongside a healthy tree. An additional photo should show just the lower, thinning portion of the tree. A third photo should give a really clear close-up of a branch that is still alive, but has areas that are not looking healthy. From those photos, I might be able to get an idea of what is going on.

The second option is to contact the MSU Plant and Pest Diagnostics Lab on MSU's main campus. They can perform a complete plant health analysis and definitively diagnose the problem from samples.





As we discussed, the main presenting problem is needle cast. We rarely see this with white spruce (including Black Hills, which is a subspecies of white spruce) unless they are grown under stressful conditions. To summarize my recommendations, begin with a soil test to see what the pH is and any nutrients that may be deficient; prune off dead branches just past the branch collar to increase air circulation; apply 2-3 inches of clean mulch out to the dripline, starting several inches out from the trunk of the tree; irrigate 1 inch water per week during dry periods; and consider a 2 year spray program, using a registered fungicide following all label directions. The first application should be made in the spring when emerging needles are one-half of full length, with a follow-up application when needles are fully expanded. It is likely the disease can be controlled in 2-years, if the underlying stressful condition(s) can be alleviated.