The Minnesota Department of Agriculture has investigated 94 sites in 22 counties since 2016 for Palmer amaranth. 

Where have we found Palmer amaranth in Minnesota? 

Online Map of Minnesota Palmer Amaranth Finds

How is Palmer amaranth coming into Minnesota?

There are numerous pathways including as a contaminant of seed, manure, screenings, and feed. Palmer amaranth can also be inadvertently moved on equipment and by birds and mammals. Agencies and researchers are identifying new pathways every year and seek solutions to address each pathway. 
Graphic of pathways for how Palmer enters the state. Pathways include feed, bedding, screenings, seed mixes, Manure, and machinery.

Palmer amaranth in commercial feed pilot program

The goal of this pilot program is to better understand the risk for Palmer amaranth in feed pathways, help find solutions to prevent its spread, and to protect agricultural operations throughout the state.

The Minnesota Department of Agriculture (MDA) regulates noxious weeds in animal feed using multiple tools:

At this time, the MDA recommends following the USDA standard for Niger seed devitalization as a heat treatment to devitalize weed seeds including Palmer amaranth in feed or feed ingredients.

Traceback investigations in Minnesota have identified millet and sunflowers as possible higher risk commodities for the spread of Palmer amaranth. This pilot program will focus on these whole grain commodities by collecting commercial feed and feed ingredient samples from feed manufacturing facilities. Fifteen to thirty samples will be collected from late summer into fall 2023 as part of this pilot program.

For more details, reference the Palmer Amaranth in Commercial Feed Pilot Program

The MDA will evaluate the data and provide a summary report of the findings from this pilot program to help increase understanding about viable Palmer amaranth in commercial feed or feed ingredients. The MDA will collaborate with stakeholders to determine appropriate mechanisms for continued protection of Minnesota’s agricultural resources.