Purple coneflower disease? - Ask Extension
I'm seeing this on some of my purple coneflowers this year. New to me. Could this be 'yellow asters" disease? Other? What is best treatment?
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Knowledgebase
Purple coneflower disease? #878905
Asked July 26, 2024, 1:29 PM EDT
I'm seeing this on some of my purple coneflowers this year. New to me. Could this be 'yellow asters" disease? Other? What is best treatment?
See attached.
Carver County Minnesota
Expert Response
Hi,
Check out these links;
https://hort.extension.wisc.edu/articles/aster-yellows/
https://northerngardener.org/aster-yellows-vs-eriophyid-mites-on-coneflower/
I think it is aster yellows but it can be tricky to tell. With aster yellows the flower is usually very pale with little to no purple color .
I hope this helps,
Sally Granath
St. Louis County MG