After noticing a few Japanese beetles on my basil plants, I used the recommended dish soap and water solution and sprayed the plants. All 3 of them turned black or brown within a day or so.
I cut them all back, and they are doing well again, except it looks like the beetles are at it again. It's not a terrible infestation but I hate seeing beautiful, big leaves with holes in them!
Any other recommendations as I'm hesitant to try the soap and water again.
Thank you