The thing is, anthracnose has been around for a zillion years. Some factor
or factors place the tree or trees in a predisposition and the anthracnose
comes out.
See Armillaria Root Rots, Predisposition and Poor Sorauer
on the topic of predisposition.
http://www.treedictionary.com/DICT2003/shigo/index.html.
I believe one of those factors is exposure to greater amounts of sunlight.
Yes, people say we have anthracnose in the woods. Then we ask them, did
they cut the over story trees. People tend to plant them in full sun
because they appear to flower more in the sunlight. Just a few thoughts.

Sincerely,

John A. Keslick, Jr.
Beware of so-called TREE EXPERTS who do not understand TREE BIOLOGY!
www.treedictionary.com
http://mercury.ccil.org/~treeman/
Storms, fires, floods, earthquakes, and volcanic eruptions keep reminding us
that we are not the boss.
Some people will buy products they do not understand and not buy books that
will give them understanding.
There is no solution for Anthracnose.

--

Travis in Shoreline (just North of Seattle) Washington
USDA Zone 8
Sunset Zone 5