By Stan V. (Stan the Roseman) Griep American Rose Society Certified Consulting Rosarian – Rocky Mountain District There was a time when it appeared that Knockout roses might just be immune to the dreaded Rose Rosette Virus (RRV). That hope has been seriously dashed. This virus has been found in Knockout rose bushes for some time now. Let’s learn more about what to do for Knockout roses with Rose Rosette. Why Do My Knockout Rose Bushes Have Rose Rosette? Some research says that the carrier of this dreaded virus is the eriophyid mite, a very tiny wingless mite that is easily moved about by the wind. Other researchers are not so sure the mite is the real culprit. Where bushes are planted closely together, such as the case with landscape roses like Knockouts, the disease seems to spread like wildfire! Due to the popularity of the Knockout roses, a bigger
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