Answer: Unfortunately, based on your description I am not able to tell you what is happening to your spruce tree. It might be a delayed reaction to the dry weather, or it might be a pest or disease problem. I would suggest you work with your local county extension to try to obtain a specific diagnosis and then based on knowing that, determine how to proceed. If it is something that requires a chemical control, they will have the most up to date information on what to use and how/when is best to apply it for maximum results. In the meantime, water as needed to keep the soil slightly damp like a wrung out sponge -- not saturated/sopping wet and not dried out.
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