Should infected roses be destroyed immediately?

It is rarely necessary to destroy roses infected with rust, and more frequently it is unwise. If promptly treated, over 90 per cent of all infected plants will make a complete recovery. I have eliminated hundreds or more roses through immediate treatment. The important thing is to determine the degree of injury and apply specific treatment within 72 hours from the first appearance of the ictic symptoms.

Implement airflow improvements immediately after pruning. Space plants at least 3 feet apart. Thin crowded canes for sunlight penetration. I install temporary support structures to redirect breezes through infected areas. This simple step reduces humidity, significantly slowing the progression of rust.

Use systemic fungicides in the proper amounts for best results. Mix as the label directs, typically using 1-1.5 ounces per 3 gallons of water. Spray in cool morning hours, when the temperature is under 85°F. Cover all surfaces, including cane junctions. I wear protective covering during the application to secure and protect myself.

Destroy bushes only showing >50% cane dieback after repeated treatments. Cut off the ground and remove the root. Burn infected material or the bag double for disposal. Never compost diseased plants. Solarize the planting area before replanting.

Read the full article: Comprehensive Rose Rust Treatment Solutions