Is there any particular insecticide I can use to protect unaffected roses? Is it worth trying to save affected roses by cutting the diseased parts off?
Certified GKH Gardening Expert
To help protect the roses that are not infected, I recommend using a product called Bayer Tree and Shrub Granules. Apply per the label directions for ornamentals/roses.Or you can purchase a good mitacide and spray the rosebushes with that per the label instructions as the disease/virus is now believed to be spread by mites. Infected rosebushes cannot be saved by pruning out the bad looking parts. Rose rosette is a virus and thus exists throughout the rosebushes infected. Here is a link to a site that has great in-depth information on rose rosette virus: http://americanhort.theknowledgecenter.com/OnDemand/index.cfm?view=category&colid=143&cid=377