If you’re still dealing with the powdery mildew, you can try this. Mix 1 tablespoon baking soda with 1 tablespoon vegetable oil and 1 teaspoon dish soap in 1 gallon of water. I’d spray a few leaves in the morning and check the plant the next day to make sure it’s doing OK, then spray down the rest if it is.
I don’t have a fix for the beetles but if you’re using traps I’d get rid of them because it seems they actually attract them. Thankfully I don’t have any. “Studies have shown that traps lead to more plant damage in the areas they are placed in. One study found that a trap placed alone led to nearby vegetation having more damage than in similar areas where no traps were placed.”
Thanks. I’ll give the treatment a try.
I’ve been spraying the beetles with 4 tablespoons of Dawn dish soap in a quart of water. I’d like to think it’s working but most likely hasn’t. They just keep coming. At first I was having fun with my salt gun and picking them off one at a time. Then they called in reinforcements and I feel like Custer getting over run. I’ve heard the traps are a bad idea. My neighbors must have them.