I've looked at your pix on alt.binaries.pictures.gardens and as far as I can tell, it looks like cedar quince rust. Take a look at this site and see how it compares to what you see on your hawthorns: http://www.oznet.k-state.edu/path-ex...ce%20Rusts.asp

Good luck,

Suzy O, Zone 5, Wisconsin


"GrlIntrpted" wrote in message ...
Hawthorne, we have four of them in our front lawn. I'm attaching photos of
the situation.
I noticed a sudden drop of leaves in approximately one week. Realizing that
it's just a tad early for the trees to shed their leaves, I took a closer
look.
Discovering what seems to be some kind of parisitic attack I don't know what
to make of it. One of the trees (tree #1 in phototj107) lost most of it's
leaves, with a thin layer of leaves all the way at the top. The other trees
are covered in these "things". Any assistance will be greatly appreciated.

-M
p.s. for photos of the problem, please see alt.binaries.pictures.gardens
under the same topic subject.