Sugar maples have brown spots over leaves, why?

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Sugar maples have brown spots over leaves, why?

Post by stan » Mon, 17 Jun 2002 08:49:38



I have two beautiful sugar maples (zone 5) that have what appears to be
a blight. The leaves have started to turn a spotty brown. There appear
to be no bugs. And the silver maples in the yard don't seem to have them
(yet). Anyone have any ideas as to what it might be. It isn't
"munching"  I don't think. BTW They are large well established trees
(18" or so in diameter) and I have done nothing to disturb the roots or
the branches.
 
 
 

Sugar maples have brown spots over leaves, why?

Post by BeeCroft » Tue, 18 Jun 2002 11:01:53


Been rather moist where you are?
Anthracnose and tarry spot come to mind.
Fungal diseases that don't kill the tree and can't be cured.
 
 
 

Sugar maples have brown spots over leaves, why?

Post by Peter Park » Tue, 18 Jun 2002 11:42:43


Quote:

>I have two beautiful sugar maples (zone 5) that have what appears to be
>a blight. The leaves have started to turn a spotty brown. There appear
>to be no bugs. And the silver maples in the yard don't seem to have them
>(yet). Anyone have any ideas as to what it might be. It isn't
>"munching"  I don't think. BTW They are large well established trees
>(18" or so in diameter) and I have done nothing to disturb the roots or
>the branches.

See link below:

http://www.cas.psu.edu/docs/CASDEPT/PLANT/ext/maple.html

Sounds like the first one, Anthracnose

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Sugar maples have brown spots over leaves, why?

Post by stan » Wed, 19 Jun 2002 10:15:59


Quote:


> >I have two beautiful sugar maples (zone 5) that have what appears to be
> >a blight. The leaves have started to turn a spotty brown. There appear
> >to be no bugs. And the silver maples in the yard don't seem to have them
> >(yet). Anyone have any ideas as to what it might be. It isn't
> >"munching"  I don't think. BTW They are large well established trees
> >(18" or so in diameter) and I have done nothing to disturb the roots or
> >the branches.

> See link below:

> http://www.cas.psu.edu/docs/CASDEPT/PLANT/ext/maple.html

> Sounds like the first one, Anthracnose

THANKS! It has been wet here for sure. And it has only affected the sugar
maples. No leaves are falling yet, and the branches seem healthy. I guess
I'll wait and see. Thanks for the info and the URL.
Stan (zone 5, midwest)