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Ulmus americana 'Brandon'
A young Brandon Elm tree without foliage (because of the time of year). From half way up the trunk of the tree to the primary branches the surface is black and scaly. Further up the tree to smaller branches, there is a marked distinction in bark colour. The smaller limbs are silvery grey in contrast to the black below. There are also small brown oval bumps in the dark areas as well.
Cold hardy to zone 3, moderate water needs, full sun, quite adaptable.
All of the Brandon Elms in the same row seem to be suffering the same ailment. From what I've come across online, a huge amount of trees in Calgary and I would guess further across Alberta have been affected by European Elm Scale. The symptoms seem to match up as the scale will stain their host and anything under it black from their pee. I compared my photos with some other cases online and there is enough resemblance for me to have confidence in diagnosing this problem as European Elm Scale.
Spotted on Oct 11, 2016
Submitted on Oct 17, 2016
1 Comment
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