Rose – Black Spot Canker on Stem Walter Reeves: The Georgia Gardener

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.

Common canker

Raker-Roberta's Young Plants

Rose – Black Spot Canker on Stem Walter Reeves: The Georgia Gardener

How to Identify, Prevent, and Treat Black Spot Damage on Roses

Black spot on roses - the most common disease. How to treat it

Privet – Control Walter Reeves: The Georgia Gardener

Raker-Roberta's Trial Gardens

Rose Canker Identification and Treatment

Silicon tested in search to defeat the dreaded rose black spot

Rose – Black Spot Canker on Stem Walter Reeves: The Georgia Gardener

Name That Plant Walter Reeves: The Georgia Gardener

Raker-Roberta's Trial Gardens

Silicon tested in search to defeat the dreaded rose black spot

Raker-Roberta's Trial Gardens

Raker-Roberta's Young Plants - Michigan Garden Plant Tour