Evergreen's losing needles and dying
Our Blue Spruce is losing it's needles and since I have witnessed several other evergreens in the neighborhood dying after they lost their needles, I'm afraid it is also what will happen to our tree. I took a sample to a local garden center and they think it may be spider mites. I'm not sure how to treat for this and also would like confirmation before putting something on the tree. Thanks for your help!
Blue spruces tend to grow well for many years and then succumb to a disease known as cytospora canker. In general, these Colorado spruces are not able to tolerate our humidity and droughts well.
Here is information on this disease: http://extension.umd.edu/hgic/cytospora-canker-spruce
We cannot say from the photos if there are spider mites. Our website explains how to look for spider mites (remember that some spider mites are good, predatory ones--they are the fast movers.) Here is our info on spider mites:http://extension.umd.edu/hgic/spider-mites-trees-and-shrubs