Knowledgebase

Is this Asters Yellow? #885370

Asked September 16, 2024, 8:38 AM EDT

I noticed these green growths on the head of my purple cone flowers. Is it Asters Yellow which would require killing the whole plant? Or someone mentioned it might be some kind of mite that would only require cutting off the flower. Please advise!

Prince George's County Maryland

Expert Response

This does not appear to be Aster Yellows, and we agree that it more closely resembles damage from Coneflower Rosette Mite, which is often mistaken for the pathogen. Clipping off the abnormal flower heads when mites are the cause of deformities is the best method of suppression.

Miri
Answered by the Home and Garden Information Center (HGIC), University of Maryland Extension. For timely gardening information and tips, subscribe to our Maryland Grows blog and quarterly newsletter. Follow us on Facebook, Instagram, and YouTube. Replied September 16, 2024, 1:04 PM EDT

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