worried about this returning to my Black eyed susans this year

Madison, NH

Last year this problem overwhelmed my black - eyed susans and also infected adjacent coneflowers. It's like a black inky stain with green bumps in the middle of each.
I tried removing the infected leaves and I used insecticidal soap but I think it was too late by then. Will this issue return this year? Should I spray the plants now with the insecticidal soap? The flowers are beginning to show their early spring growth and some of the leaves are a little dark already. HELP! PLEASE! Love these flowers.

This message was edited Apr 12, 2021 9:17 AM

This message was edited Apr 12, 2021 9:26 AM

Thumbnail by kbkar
Madison, NH

Hoping for a reply by now.

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