I deal with this problem every year. What would be the best solution? I have Norway and White spruces. Norway are ok but White spruce is trouble.
Generally simplest to just ignore them, they don't cause any significant damage. Pick the young galls off by hand if you find they look too unsightly.
Thanx. On some spruces, I found about 20-30 of them and on most, I didn't find single one. The trees are about 6 feet tall.