Last year my garden was hit hard by powdery mildew. So this year I was more careful about spacing and I've been careful about watering, too. (Trying to make sure I'm only watering the soil, not the leaves, and not watering at night when the leaves that do get wet would stay damp a lot longer.) So far, so good. But then yesterday I found a couple of tell-tale white spots on one of my zucchini leaves. I made sure to remove it.
I've read that a mixture of baking soda & water or a mixture of milk & water can combat powdery mildew...do you know if it would help prevent it, too? How often should I apply it? If I find more spots in the next few days, I'll think I'll need to start spraying.
Is baking soda or milk better for powdery mildew prevention?
My potatoes were hit with powdery mildew when they sprouted.
I mixed about 1/4 milk and 2 tablespoons of dish detergent into a gallon contain and mixed well. Sprayed it on my plants with a spray bottle and it disappeared quickly. I reapplied a couple days later and it has not come back since.
Yep. I read it was the milk that's used, especially for that stuff on roses.
I prefer the milk mixture too. Baking soda will cause some plants to get brown or black leaves after spraying(at least that's what several in our co-op group found). One nursery recommended garlic spray for PM and it turned all of my english peas brown.
Thanks! If it comes back, I'll give the milk mixture a try.