Click links below for information on identifying and reporting Palmer amaranth (PA).
Click Here for a map of affected areas.
With the discovery of PA in North Dakota, it is imperative to act quickly to address this new invader. It is critical to work collaboratively with your county weed board and county extension agents in identifying new populations.
If suspected Palmer plants are found:
- Landowners should scout fields starting in late spring through summer and fall, especially before harvest.
- When a suspicious plant is found, contact your county Extension agent or county weed officer.
- Mark/flag the location and leave the plant in place in order to not spread seed. It is also easier to identify if it hasn’t been pulled.
- Take photos, photo quality will make it easier for plant identification. For example, take photos of leaves, stems and flowering structure on separate pictures compared with trying to get the entire plant in one photo. Generally, a specialist will travel to the site if it is deemed likely to be Palmer.
- The county weed officer will work with the NDSU Extension agent to:
- Gather images and documentation to send to an NDSU weed specialist(s) for confirmation or for ruling out Palmer.
- Develop an action plan with an NDSU specialist, Extension agent and county weed officer if Palmer is confirmed.
- Landowners should hand pull, bag on site and destroy confirmed Palmer plants.
- Palmer plants should be burned or deeply buried to prevent movement of seed.
- Landowners should work with their county weed officer and continue to survey the field for a period of 3-5 years post removal to verify no additional Palmer is found.
- County Extension agents: https://www.ag.ndsu.edu/extension/directory/counties
- County weed officers: https://www.nd.gov/ndda/sites/default/files/resource/Weed%20Board%20Directory%20-%20public.pdf
- North Dakota Department of Agriculture: www.nd.gov/ndda/pa (Richard Weisz, 701-328-2250, firstname.lastname@example.org)
Genetic testing link:
- National Agricultural Genotyping Center (Fargo, ND):