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.

Raker-Roberta's Young Plants

Silicon tested in search to defeat the dreaded rose black spot

Rose Canker Identification and Treatment

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

Treat black spot to improve appearance of old garden roses, but they'll survive even with it, Home/Garden

Acer pectinatum subspecies forrestii 'Alice

Rose Canker Identification and Treatment

Black Spot Canker On Roses: see notes below We are attaching a website that will go into this a little detail than we can here.…

Resource Guide for Organic Insect and Disease - Cornell University

Crop Science

Name That Plant Walter Reeves: The Georgia Gardener