Pests and Diseases forum: Identify this leaf disease?

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svarog
Aug 26, 2016 10:11 PM CST
Hello,
Over the past couple of weeks my 50+ year old maple tree has been showing yellow-green leaves on the east/north side, even though it's too early for fall colors (I live in Denver, CO). Upon closer inspection, I noticed that some of these yellowish leaves are also curled and browning. Here are some pictures.

Can anyone identify the cause, and suggest treatment?

Thanks in advance,
Svarog

Thumb of 2016-08-27/svarog/ec19ea
Thumb of 2016-08-27/svarog/ec9c8b


svarog
Aug 28, 2016 11:20 AM CST
I should mention that it is only happening on one side.
Name: Sue
Ontario, Canada (Zone 4a)
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sooby
Aug 28, 2016 11:52 AM CST
What kind of maple is it? The leaves look more like an oak than maples I'm familiar with. It has interveinal chlorosis on those leaves - it is possible for iron chlorosis to affect one side of a tree. Did you check inside the curled leaves for pests?

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