I'm dealing with a frustrating powdery mildew issue in my garden. It's showing up in both my raised beds and the ground soil garden area. Last year, I tried to treat the plants to prevent it, but they still ended up with it, and I lost some leaves and plants. This year, I'm hoping to plant tomatoes and other plants that are susceptible to mildew. If I can't get rid of this problem, I'm worried my efforts will be wasted since it'll just kill my plants again.
1 Answer
The best approach is to immediately remove and discard any infected leaves as soon as you spot powdery mildew. I deal with it each year on my squash, but they generally survive it. When I've had to use sprays, copper fungicide works as a last resort. While it protects healthy leaves, it doesn't help much for ones already infected. I've never had trouble with tomatoes getting powdery mildew – mine usually battle blight instead, so I keep them pruned.