Thank you for your question. Unfortunately, detail is not sufficient for me to see an insect. Until the insect is identified, I cannot provide a solution. Below is a link to insects and diseases of spruce trees. I recommend you try and ID the pest or maybe it is a disease?? If you are unable to make a diagnosis, I recommend you take a sample of an affected branch into the El Paso County Master Gardener Help Desk. The link to the office below. Note - in early October the desk will close for the season. Also, desk is not staffed during all business hours so you should call first before making a trip.

Help Desk - https://elpaso.extension.colostate.edu/landscape-garden-help-desk/