Should I be worried about this tree?

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MBC775

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A few days ago we had a bad wind storm and large branch (actually about half the tree) in my front yard was blown down. Looking at the tree where the piece broke off and there is an odd black substance where the break was. I will attach pictures. I am wondering if this mean the tree has some sort of disease or rote and I should just cut the whole thing down.

Thanks in advance.
 

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Looks like maybe it cracked a couple years ago, and it’s attempt at compartmentalising made some of that new sealing tissue become included in the crack rather than seal over it.

There’s some existing decay, and that’s a pretty massive wound. It’s days are numbered, if it was mine I’d probably remove it. If it’s at all in range of causing any damage to anything when it fails, I would definitely remove it. If it’s got room to fail all over without hurting anyone or anything, you can see what happens. Expect a big crop of epicormic/ sucker growth probably.

You know what it is?
Chinese elm/ lacebark elm?
 
Yeah, that looks like it was cracked and an open wound for quite some time. Probably just black mold that will bleach out in the sun now. But most trees won't survive a big wound like that. Could take another 20 years but it will eventually rot away in the weather.
 
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