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lesser celandine #823691

Asked March 28, 2023, 10:04 AM EDT

Hi, I have this yellow flower, not marsh marigold, but the invasive lesser celandine. I don't know how it came about in my yard, but it is hard to get rid of each year, digging and spraying and it migrating into neighbor's yards. What can I do? I have used glyphosate Round-Up. Can I be held accountable and sued for this unruly plant? Thank you, Kathy Argo

Butler County Ohio

Expert Response

Dear Kathy
It is indeed unruly.
If you did not intentionally plant it, I do not believe that you are not liable for its existence or spread. Lesser celandine has spread throughout Ohio.

https://extension.umaine.edu/publications/wp-content/uploads/sites/52/2015/04/2534.pdf

Re: control.
"An application of a 0.5 percent mixture of a glyphosate-based herbicide can be sprayed on the leaves of the plants when the
temperature is expected to be above 40 degrees F, and no rain is forecast for the next 12 hours. If the target population is in a wetland, be sure to use an herbicide formulated for those conditions. Glyphosate is nonspecific herbicide and will kill
lesser celandine as well as desirable vegetation that it contacts, so avoid spraying nearby native plants. Use herbicides responsibly and follow manufacturer’s directions. Contact the Maine Department of Agriculture for information on restrictions that apply to the use of herbicides. Consult a licensed herbicide applicator before applying herbicides over large areas."

https://bygl.osu.edu/node/1212
"Research conducted in Wolf Trap National Park in Virginia
and published in 2017 focused on glyphosate applications made in the spring at three early phenological phases: pre-flowering, early flowering, and 50% flowering.

The results revealed that a single-season application
made at the pre-flowering stage produced 60% control; a second-year application could not be made owing to environmental conditions. Treatments made 2 years in a row targeting the early flowering and 50% flowering stages produced 90% and 95% control, respectively."
All the best, Roxanne
An Ask Extension Expert Replied March 28, 2023, 11:34 AM EDT
thank you for the information. 

On Tue, Mar 28, 2023 at 11:34 AM Ask Extension <<personal data hidden>> wrote:
The Question Asker Replied March 29, 2023, 7:20 AM EDT

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