RE: Powdery mildew
- Subject: RE: Powdery mildew
- From: "Kelly Stephens" j*@mchsi.com
- Date: Thu, 7 Aug 2003 17:17:00 -0500
The baking soda recipe was tested at Purdue for blackspot on roses and found
to be effective. For culinary herbs, I'd use cooking oil instead of hort.
oil...someone who couldn't find hort. oil used olive oil and said it worked
a treat....
To 1 gallon of water, add
3 tablespoons of baking soda,
1 teaspoon of horticultural oil
1 teaspoon of dishsoap (as in liquid, like Joy)
Apply every week to 10 days by spraying ... remove infected
leaves. Also, spray the ground around the plant.
-----Original Message-----
From: owner-perennials@hort.net [o*@hort.net] On Behalf
Of Barb Pernacciaro
Sent: Thursday, August 07, 2003 4:54 PM
To: perennials@hort.net
Subject: Powdery mildew
August is here and so is the powdery mildew on the monarda and the phlox is
getting ready to bloom, so I hate to see it. There was a "homemade" recipe
for a spray sent to the list, but I can't find where I saved it. In doing a
search online, I found a paper comparing different sprays on one cultivar of
phlox, and thought it might be of interest. Here's the URL:
http://pss.uvm.edu/ppp/bctplx99.html
WiltPruf gave the best results in this trial - interesting!
And if someone still has the baking soda/horticultural oil recipe, could you
send it out again?
Thanks, Barb in WI
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