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ahm129

Help! Strange growth on Abutilon

ahm129
9 years ago

Hello. I have a yellow abutilon that seems to be growing well. However, I just noticed some strange black growth, see picture, growing on some of the stems. I can pluck it off and the black growth seems empty. I am also seeing a lot of ants crawling on it. Almost looks like it's eating the leaves. Can someone help me identify the problems and help find a cure? Should I worry?