powdery mildew

For those who replied about powdery mildew on mint, Thank you!

The following ideas seem to be the most organic methods

Sulfur
When to Use:  Apply to affected plants at the first sign of symptoms to
prevent spread of disease to unaffected areas and new growth.  Repeat
treatments will likely be required if the fungus was left untreated too
long.

Lime Sulfur or Wettable Sulfur
When to Use:  As directed as trees leaf and bud in the spring.

Dormant oil and Lime Sulfur mix
When to use:  Use a horticultural oil in late winter or early spring before
any growth starts.  Apply as directed and spray until the mixture runs off.

Baking Soda Spray
Recipe:  Mix one teaspoon of baking soda and one quart of water in a spray
bottle.  Add a few drops of dishwashing liquid.  Adding 1/2 teaspoon of oil,
such as Sunspray Dormant Oil, or even Canola oil may increase the
effectiveness against black spot and other fungal diseases.  Apply
liberally.

Milk
10-20% skim milk to water ratio.  Milk seems to boost the plants immune
system to fight off fungi.  Apply liberally.

We are trialing the baking soda (sodium bicarbonate) with some spreader in
the form of dish washing detergent by total immerse.
Initially all the visible mildew disappeared.
If this does not work then we will add some canola oil to the mix

regards
MRK

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