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.

Stumped by Cane Canker?

Wet Weather Brings Fungal Diseases

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

Rose Canker - Symptoms And Cures For Stem Canker In Roses

Where's Walter? Walter Reeves: The Georgia Gardener

Stem Canker & die back in Roses Symptoms & control measures

Vegetables diseases by virgiulloac - Issuu

Graham Thomas® David Austin Bare Root Rose - Menagerie Farm & Flower

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

Rose – Roots Damaged by Fertilizer

Stumped by cane disease? Be ruthless, for your roses' sake - The San Diego Union-Tribune