A client of mine has three blue spruces and two balsam firs in their back yard. One of the spruces is about 25' tall, the other four trees are 15' to 20' and all within 20' to 30' feet of each other. One of the blue spruces has a dead central leader. It seems like it is about the top foot or less. I haven't had chance to climb up to see the damage close up yet, but I did inspect the rest of the tree from ground level and there does not appear to be any other damage, nor to any of the other trees. My first thought was spruce budworm, but seems odd that with such a destructive pest, only one tree would be effected. Any thoughts to other culprits and what to look for when I do a closer inspection?