Dan, There are several diseases that are attacking spruce trees and the drought heat and drought have also stressed them. I suggest you have a certified arborist do an on-site inspection. In my area it costs about $75. A miss diagnosis from me could cost you the tree and taking it down and replacing it will cost big bucks. Best And Happy Yardening, Nancy.
Spruce Tree Losing Large Quantity Of Green Needles
Question From: D. Tuthill - NEW YORK
Q: I have a spruce tree that has been losing large quantities of green needles this spring for no apparent reason. The loss is 360 degrees around the tree and is at all heights and depths. Any place where you gently touch the branches the needles fall off in clusters. The tree is approx. 25-30 years old and appears to be healthy, this has never occurred before. Is this cause for alarm?