What is making these marks on my Rose leaves?
I noticed mid Summer (South east PA) that these spots started appearing in my rose leaves. I saw no bugs, no aphids.. I did notice an increase of lady bugs but only ever saw one or two on the rose bushes. I always treat the soil and give them rose food.. it did effect the growth of the bushes as well.
How can I try to prevent them from having more trouble this coming Spring?