Palmer amaranth is a high priority noxious weed



department of agriculture


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June 30, 2022

June Weed of the Month: MDA Report a Pest System & Palmer Amaranth

<[email protected]>Shane Blair <[email protected]>,?Minnesota Department of Agriculture

It?s weed season and with it comes the importance of being aware of invasive plants in the field. For example, Palmer amaranth is a fast-growing annual weed that is detrimental to row crops and can add higher production costs to farmers already dealing with high input costs. Palmer amaranth has developed resistance to multiple classes of herbicides and their different modes of action, making it very difficult and expensive to control.

The Minnesota Department of Agriculture (MDA) considers Palmer amaranth to be a high priority noxious weed and has been working closely with farmers, crop consultants, and University of Minnesota Extension educators to eradicate new infestations when discovered. Since 2016, the MDA has identified multiple pathways in which Palmer amaranth is moving throughout Minnesota, including seed, feed, screenings, and manure.

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Palmer amaranth sticking up in a grassy field [ [link removed] ]

"A Palmer amaranth plant in a grassy field."

*Click here to download the photo [ [link removed] ]*

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During each growing season, the MDA Noxious Weed Program receives many inquiries about plants like Palmer amaranth. Inquiries often include requests for identification, questions about how to manage weeds, and requirements expected of landowners and local governments under the Noxious Weed Law. For the MDA to respond quickly to suspected reports of species like Palmer amaranth, the MDA deployed a new Pest Case Management System in 2021 to help identify suspect plants faster.

Report a Pest logo with a little green bug [ [link removed] ]

If you were familiar with the "Arrest the Pest" email and voicemail, it has now been renamed "Report a Pest" to work with the new Pest Case Management System. Report a Pest allows the public and MDA stakeholders to report suspected pest infestations online. It requires the user to submit information about the suspected species, location, and contact information so MDA staff can ask for follow-up information if necessary to confirm the report. If photos are provided, staff can quickly identify the species and determine if it is a species of concern that would require further investigation. MDA staff can then create individual case actions when species of concern are documented through these reports. Any pest species can be reported, and the MDA?s quick response to Palmer infestations has been greatly enhanced by this new reporting system



If you suspect Palmer amaranth on your property, immediately visit the MDA's?Report a Pest [ [link removed] ]?page and enter the location of the suspected plants and your contact information into our online reporting form. If you have a phone or camera with you, take several pictures of the plant (whole plant, leaves, flowers, etc.) and upload them with your report.

Once you've reported through Report a Pest, an MDA staff member will review and contact you if more information is needed or to let you know what the next steps will be. If a suspect plant is found, either flag it clearly so that it can be quickly found if the MDA decides to visit the site or remove it from the field and save it until the species has been confirmed. Live plant material should be placed in a plastic bag and refrigerated. Dead and dry plant material should be placed in a paper bag and stored at room temperature. If the MDA suspects that the plant is Palmer amaranth, we may request you send plant tissue to a lab for genetic testing to confirm identification and will send you a protocol for submitting a sample.

Visit the MDA?s Palmer Amaranth in Minnesota [ [link removed] ] webpage where you can learn more about the plant and what characteristics to look for to identify it in the field.

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*MEDIA:*?For more information on Weed of the Month, contact Allen Sommerfeld, MDA Communications,[email protected]?or 651-201-6185






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This email was sent to [email protected] using GovDelivery Communications Cloud on behalf of: Minnesota Department of Agriculture ?625 Robert Street N ? Saint Paul, MN 55155 GovDelivery logo [ [link removed] ]


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