"Chris S." wrote:
In article m,
says...
Hey, Chris! Do you live in the U.S.? My husband works for the Oregon
Department of Forestry for our area, he says that our Dogwood trees in
Zone 8 are doing great. He says he'd need to know where you live to be
able to make a guess as to what's going on.
I sure hope your Dogwoods feel better, if they are sick.
Yes, I do live in the states. Zone 5. I did spray mine with a fungicide
because they had black spots and some leaves are turning purple and
dropping. Temps have been in the 80's to 90's. I thought mine was the
only tree until I started looking around. They all look like mine. My
main concern was the health of the tree. It's mature and I sure would
hate to lose it.
-Chris Swartz
Ahhh....your first post omitted the spotting and discoloration. Sounds like
dogwood anthracnose, a serious degenerative fungal disease. There is no cure
for it, although keeping your tree in maximum health will prolong its life.
The curling of the foliage is defintely a reaction to your temps, but that is
not a manifestation of anthracnose - it will happen to perfectly healthy and
disease-resistant dogwood cultivars in hot weather.
As to the health of dogwoods in zone 8, our native dogwood, Cornus nuttallii,
also suffers severely from anthracnose and native stands are dying out. Ditto
with most of the eastern flowering dogwoods planted in gardens here, Cornus
florida. Surprised the forest service worker is not aware of this extremely
common problem.
pam - gardengal