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Old 19-07-2003, 02:42 AM
elfa
 
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Default White powdery mildew

In article DQYRa.94052$H17.28625@sccrnsc02, "James says...

I have one rose. Not special rose, just a small thorny thing, but an old
buddy. Every Spring it suffers from white powdery mildew and I try various
things on it which may or may not works well. This Spring I was gone a lot
and it suffered to the point it did not provide the first set of flowers. I
finally got time with it and trimmed back severely and treated with some off
the shelf stuff which seemed to work.

What do I use early on before serious infestation occurs to help this rose?

Thank you

Jim


Below is what the Petaluma Rose Company says about it:

Powdery Mildew looks like a white dusting on rose leaves. It is controlled by
Orthenex. The organic method is 1T baking soda, 1T vinegar, 1 T vegetable oil to
a gallon of water. Other good sprays are neem oil, horticultural oils or ultra
fine oil (spray on cool days).

I've used the organic method, neem oil method and am now trying Orthenex (it was
a gift). All seemed to work for me. I'm in a climate that is hot and has NO
rain from May to October (zone 9) and it's currently 94 degrees as I write this.

elfa