Japanese Maples forum: Please help ID this possible maple disease!

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Name: Ericka Leatherby
Southern Illinois
Sep 28, 2016 2:18 PM CST
Can anyone help me identify what is causing this pattern to appear on these leaves? It is only on these certain maple trees (I'm not sure which kind of maple). I'm in Southern Illinois, and these two trees have been looking like since August. I have searched online and can't seem to find any information on this particular pattern that is only on this kind of maple tree.

Thumb of 2016-09-28/CuriousPhotographer/920068

Name: John
Scott County, KY (Zone 5b)
You can't have too many viburnums..
Region: United States of America Region: Kentucky Farmer Cat Lover Birds Bee Lover
Butterflies Enjoys or suffers hot summers Enjoys or suffers cold winters Dog Lover Hummingbirder Lover of wildlife (Raccoon badge)
Oct 1, 2016 8:46 AM CST
That is likely a selection of Red Maple (Acer rubrum). That patterning is indicative of chlorosis, but could be caused by other stressors. Red Maple is very commonly planted (some say overly so) and sometimes in places inhospitable to its proper growth. Red Maple can also be accosted by a number of pathogens, from insects to fungi and climatic factors.

Showing more of the situation than this tiny fraction of the plant makes all the difference in the world. Start with showing the whole plant/tree, and then work down to this level of detail. Oftentimes, the site the tree occupies tells the story; other times, it is something else afflicting the plant. We here online cannot know unless you more fully describe in words and images what is going on there.


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