I had Japanese beetles really bad last summer. I just mixed up some liquid sevin and sprayed it right ON the beetles. I didnt spray the whole area. The beetles died right there on the plant. I tried to spray mostly the leaves where they were and not get it on the blossoms. I didn't really notice anything else much that died in the area, just the beetles. They were dead within a few mins. I just went out about once a day and did that. Just kept the bottle in a handy place.
