Evergreen trees dying. - Ask Extension
Several trees have died and it seems that the branches die by the anomaly.
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Evergreen trees dying. #941977
Asked August 09, 2026, 6:01 PM EDT
Several trees have died and it seems that the branches die by the anomaly.
St. Clair County Michigan
Expert Response
Hello
This is Eastern spruce gall adelgid, Adelges abietis,
an insect that feeds on the tree at the base of new buds. The tree reacts by developing the pineapple shaped galls.
Prune out dead branches. Prune off, Bag and discard any still green galls next spring, (this time of year they should all be brown, which means the insects have exited the galls).
Here are details, and how to prevent next spring’s insects from developing more galls. https://www.canr.msu.edu/resources/eastern-spruce-gall-adelgid
This is Eastern spruce gall adelgid, Adelges abietis,
an insect that feeds on the tree at the base of new buds. The tree reacts by developing the pineapple shaped galls.
Prune out dead branches. Prune off, Bag and discard any still green galls next spring, (this time of year they should all be brown, which means the insects have exited the galls).
Here are details, and how to prevent next spring’s insects from developing more galls. https://www.canr.msu.edu/resources/eastern-spruce-gall-adelgid
