Rotenone would work, and for more products (mostly organic) go to
www.gardens-alive.com. I have no commercial or personal ties to them, I
just have confidence in all of their products. I have tried one that did
"Maria Luna and Mark Bornfeld" <bobsey at ix.netcom.com> wrote in message
news:3979F972.BF17C222 at ix.netcom.com...
> Could someone suggest appropriate treatment for powdery mildew on my
> sumac bushes? I'm not necessarily averse to use of chemicals, if
> I'm located in Brooklyn, NY, zone 7...
>>> Mark Bornfeld
> Maria Luna P.T. and Mark Bornfeld D.D.S.
>http://www.dentaltwins.com/> Brooklyn, NY 718-258-5001