https://www.gardeningknowhow.com/ornamental/flowers/roses/rose-canker-fungus.htm
Rose Canker - Symptoms And Cures For Stem Canker In Roses | Gardening Know How
Dec 12, 2022 - Rose canker is the most common of the several kinds of fungi that can affect the canes of roses. When left unmanaged, they can eventually kill your rose plant....
symptoms and cures