Answer: Spruce trees can be attacked by a number of serious pests and diseases. Unfortunately, it is impossible to give you a definite diagnosis and cure based on the information here. (In order to make a good suggestion as to what to do to help the tree, first we need to establish the exact cause of the problem.)
For such a lovely, large and established tree, you might wish to consult with a professional arborist or your County Extension agent (tel. 345-3283) for a positive identification of the problem and suggested control, if any. Since some of the possible problems are accelerated by hot weather, you might wish to call them as soon as possible. I would also suggest that, if a spray is recommended, you consider hiring a professional applicator with the proper equipment for such a large tree.
Good luck with your tree!
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