Witches' Broom on Coreopsis Near Rose Rosette: Unlikely Same Virus—Lab Needed for ID

Key Fact

Rose rosette virus is host-specific (Rosa spp.). Coreopsis witches' broom has other causes: other viruses, mites, herbicide drift, genetic mutation.

Action

• If other healthy plants nearby, remove/destroy affected coreopsis (bag debris).
• Lab test needed for exact cause.
• Good sanitation prevents spread.