The Polk County Cooperative Weed Management Area (PCCWMA) group obtained a grant from the Northwest Minnesota Foundation to conduct a baseline inventory of species/infestations along county roads, township roads, state highways, and gravel pits. The PCCWMA identified the need to expand both the number of species/infestations being recorded and the survey area. Prior data only included information about Canada thistle, spotted knapweed, and leafy spurge infestations along county roads and state highways.
The PCCWMA established leafy spurge, spotted knapweed, thistle species, and cattails as priority species. Additionally, secondary plants of concern for the county included common toadflax, common tansy, cow vetch, crown vetch, oxeye daisy, Queen Ann’s lace and wild parsnip. All roads in Polk County were surveyed and noxious and invasive weed infestations in the road right-of-way were recorded using Global Positioning System (GPS) technology. Data collection was completed in the summer of 2009 and 2010.
All available data was combined to produce a baseline map of infestations to be used as a planning tool to effectively target treatment resources to the highest priority areas.
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