Powedery mildew on central squash patch (butternut and jumbo pink banana)

This morning, noticed large patches of powdery mildew (I assume that's what it is) on a few leaves.

Will apply apple cider vinegar solution, using my old pump sprayer from misting down Walter many years ago.

Recipe for the powdery mildew brew:

- 5 Tbsp apple cider vinegar
- 1 Tbsp vegetable oil
- 1 gallon water

Don't make it too strong!  And, apply AFTER sun, not before/during, because burns the leaves!


Here are some other recipes I found, but I didn't try these:

Potassium bicarbonate recipe:

- 3 Tbsp potassium bicarbonate (where does one get this?)
- 3 Tbsp vegetable oil
- 1/2 tsp soap
- 1 gallon water


Neem oil recipe:

- 3 Tbsp neem oil
- 1 gallone water