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I noticed the same problem on one of our 150 year old white oaks in
Pepin WI this weekend. This is an area that had been logged off 35
years ago and the only oak trees remaining were the ones that were
gnarly and short trunked. This is a magnificent tree, surrounded by red
oaks and some white babies, none of which seem affected. It spreads
over 100 feet! and its crown is about 2.5 stories high (how high IS
that?) It cathedrals our lawn and hillside. A clue to the problem
might be the wet year, and this oak's habit of spreading low to the
ground in a forest that restricts a lot of wind.
So..........In a panic, I took a branch with the symptoms home and while
I was waiting for the diagnostic clinic to open I did my research.
I am assuming that this is an Anthracnose infection. According to the
U, it is unsightly, terror-inducing, but not necessarily fatal. Check
out the briefs and this link. If I'm wrong in my assumption, I hope
someone will set me straight.
http://www.extension.umn.edu/projects/yardandga
rden/ygbriefs/P432oakanthr
acnose.html
Mary Courteau
Ramsey Co Intern
----- Original Message -----
From: RDade2315@aol.com
To: mastgar@extension.umn.edu
Sent: Tuesday, June 01, 2004 9:15 AM
Subject: [Mastgar] Oak Tree Problem
Hope someone can help with the following problem regarding my oak
trees. I am in Anoka County and have both Red and White Oaks on my
property. I noticed yesterday that my White Oak leaves are browning,
curling and wilting. The Red Oaks look fine. This is happening on the
tree from about the middle of the tree branches on down. The top of the
tree canopy looks OK. What is happening? Can anything be done to stop
it? It doesn't behave like Oak Wilt - ie: leaves turning brown from the
canopy and working its way down the tree, but Anoka county does have its
problems with Oak Wilt. Is it something to do with this wet, cool
weather we have had all month? Thanks for any help you can send my way.
Denise
Anoka County MG
