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Hollyhock infection #872791

Asked June 12, 2024, 12:13 PM EDT

I have 2 hollyhocks ( we purchased a house this summer so have no history of the plants) - they clearly have something happening- maybe it’s hollyhock rust? If so, how do we treat or do we pull out the plants completely? I’ll attach 2 photos. Thank you for your assistance.

Ramsey County Minnesota

Expert Response

It looks like hollyhock rust, although there might be some insect feeding damage on the upper leaves.  Read here:
https://hort.extension.wisc.edu/articles/hollyhock-rust/
If you pull the plants (which would be my recommendation), follow the recommendations for disposal in the link above.

The insect damage might be slugs or earwigs.  Look here at a similar question:
https://ask2.extension.org/kb/faq.php?id=782144
Dennis in St. Louis Park Replied June 12, 2024, 2:40 PM EDT

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