Sugar Maple Bark Turning Black

Treehgr(z6/N. BUCKS, PA)July 11, 2011

Hi-

We have several sugar maples on our property. Recently the trunks have started to turn black. The leaves appear healthy. Does anyone know what this could be caused by?

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arktrees(6b NW Arkansas)

It's very common. Assuming the trees are otherwise healthy, mature Sugar Maples frequently develop this black color. It is cause by a mold that does not harm to the trees.

Arktrees

    Bookmark   July 11, 2011 at 10:19AM
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ken_adrian Adrian MI cold Z5

need some pix.. check out the link

could be maturity as ark seems to suggest

or could be honeydew from aphids..

ken

Here is a link that might be useful: link

    Bookmark   July 11, 2011 at 10:57AM
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j0nd03

IMO, the black bark gives a fantastic contrast to the fall color display WRT sugar maple.

    Bookmark   July 11, 2011 at 11:05AM
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brandon7 TN_zone(7)

"could be maturity as ark seems to suggest"

I think Ark was suggesting the same thing as you are, Ken. The black sooty mold grows on the honeydew (which is not, itself, black). I personally don't care for the look, but TEHO (since we are using abbrs).

    Bookmark   July 11, 2011 at 11:08PM
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arktrees(6b NW Arkansas)

Yeap, Brandon/Ken. That's what I was saying. I just did not want to go into detail unless the OP wanted it.

Arktrees

    Bookmark   July 11, 2011 at 11:38PM
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brandon7 TN_zone(7)

Another common possibility is sapsucker damage resulting in sap leaking down the trunk and a black fungus growing on the sap. If you see rows of holes in the trunk above the blackened area, that is probably what's going on. This is usually not a big problem for the health of the tree unless the bird damage is extensive.

    Bookmark   July 12, 2011 at 12:07AM
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