We planted 4 skip laurels this summer and until about a week ago they were all looking good and dark green. They are in a row to provide a hedge by our fence to screen off the neighbor behind us and have knockout rose bushes a few feet in front of them. The first 2 in the row are still dark green, the next one has almost all yellow leaves and then the one after that is starting to yellow from thr bottom, leaves up. There are some holes in the leaves I think from the beetles earlier this summer. The rose bushes are doing great so I think the water and soil is okay. Should I try spraying with something?