Rose Rosette Virus Identification and Control
What is Rose Rosette Virus?
One of our beloved landscape plants, the rose, has been increasingly affected by this virus, which is spread by wind transferred, tiny mites. Symptoms include thickened stem growth, excessive thorns, witches’ broom growth at end of stems, branch dieback, discolored and distorted leaves.
Unfortunately, there is no cure for this virus and affected plants will need to be removed and destroyed. Do not compost the cut materials. For existing, unaffected roses, treat with dormant oil after cutting back in February, which will help control overwintering mites. Remove any fallen leaves or debris.
Research is being done on disease resistant varieties.