Q.Can You Help ID This Rose Problem?
These are Knock Out Roses – planted 2 years ago – had great blooms on them in May/early June, but this particular cane has light green branches, and looks a bit sad compared to the rest of the plant. I cut it back in early February. I live in NW Indiana.

GKH_Susan
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on July 6, 2021
It could be stem cankers.
https://www.gardeningknowhow.com/ornamental/flowers/roses/rose-canker-fungus.htm
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