I noticed the leaves on one of my knockout bushes had silvery stripes on them or blotches. When I looked at the bottom of the leaf, I saw tiny grayish worms. What can I put on my rose
bush to get rid of the worms? I picked off the leaves I could and destroyed them. I also saw some holes in some of the buds. Is there something safe I can spray on them to get rid of the worms? Thanks.