Rose – Black Spot Canker on Stem Walter Reeves: The Georgia Gardener
By A Mystery Man Writer
Description
Q: Can you tell me what is causing the brown spots on my Knockout rose stalks? A: At first I thought it was rose cane canker but pathologist Jean Williams-Woodward says: "Cytospora canker tends to have a tanner center and the canker girdles the stem. These look more like black spot infection of the stems.
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