picture of white spots on crimson king

[Icarus]

John:

Here's a shot of a leaf with the white spots from the aforementioned crimson king maple. Virtually every leaf has these spots, as well as the yellowish brownish spots like the other picture I posted. Some of the leaves seem to be completely covered with white spots.

Thanks a ton.

Dan

 

[Icarus]

white spots all around the city

I was driving today and began to notice these white spots on many maples around the city. One tree, in fact looked as if it had all white leaves, there were so many spots. Is this something the city should be concerned about, or is it something that will go away after fall and not return in the spring?

We've had a doosy of a hot and humid summer, with very little rain overall.

Thanks again. You guys are an incredible resource.

-Dan

 

[Stumper]

Probably cottony mildew. It usually isn't too serious and can actually be washed off the leaves on small trees and shrubs (kind of hard to do on a mature tree.)

 

[Kneejerk Bombas]

Think that's the same thing causing this white discoloring on the trunk of maples here in SE WI?

 

[Stumper]

Is that a trick question Mike? It looks like spots of sunlight hitting the bark. If it isn't a joke I have to say I don't know.

 

[Kneejerk Bombas]

No. Here's another shot, the leaves are normal.

 

[Jay Banks]

Those are age spots. I have them all over my arms too.

 

[Kneejerk Bombas]

OK, if none of you guys know, I'll send a sample to my local extention office. Today I saw some on a honeylocust.
As for the white spots on Icarus's leaves, that doesn't look as thick as powdery mildew. Any comments on that?

 

[Stumper]

Mike I still don't know but the second pic reminded me of stuff I have seen on trees down on the Gulf coast. My first trip down to Texas'Coastal Bend in winter I had trouble identifying some familiar species because the bark looked so different with all the mosses molds and mildews growing on it!

 

[Jay Banks]

Mike,
I'm sort of serious, I don't think you have a stem disease. On thin barked trees I've seen areas the change hues. this portion of the stem may receive intense sun light.

Keep us posted if the extension service turns up any thing.

 

[Kneejerk Bombas]

The samples of the white spots were sent off to the extension and came back as begining stages of lichen.
I thought I'd bring this up to explain my response to the inquiry made by erob914, in the post "Something on my maple".