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Six New Weeds Added to Minnesota State Noxious Weed List

Euonymous alatus, winged burning bush
is now a Specially Regulated MN noxious weed
Six new weeds have been added by the MDA to Minnesota's Noxious Weed List. The state's Noxious Weed List provides specifics on how to control these weeds, and is divided into these four categories:
  1. Prohibited Eradicate - Most serious threat; remove all parts of the plant above and below ground
  2. Prohibited Control - Landowners must manage to prevent plant from spreading
  3. Restricted - Landowners encouraged to manage, but not legally required to remove
  4. Specially Regulated - Special management plans have been developed by the MDA to minimize potential harm
Learn more about these category definitions:

What makes a plant a noxious weed?

The MDA is the lead agency responsible for regulating noxious weeds. Along with the Noxious Weed Advisory Committee, the MDA updates the list every three years. Additions to the list are approved by the Commissioner of Agriculture. 

View the updated Noxious Weed List:

Plants on the Noxious Weed List may be harmful to public health, the environment, public roads, crops, livestock, or other property. Restrictions are also placed on the sale, transport, growth, or spread of the plants.

Plants are assessed objectively for risks to Minnesota landscapes using a protocol that examines documented scientific evidence of the plant as being harmful. The protocol also strives to balance concerns about potential negative impacts with any recognized benefits associated with the plants in question. 

Plants are reviewed by members of the Noxious Weed Assessment committee, a subcommittee of the Noxious Weed Advisory Committee.

Six new species added to the list

  1. Japanese honeysuckle (Lonicera japonica) as Prohibited Eradicate 
  2. Bohemian knotweed (Polygonum x bohemicum) as Prohibited Control
  3. Siberian peashrub (Caragana arborescens) as Restricted; exemption for the Green Spires® cultivar (Caragana 'Jefarb')
  4. European alder (Alnus glutinosa) as Restricted
  5. Norway maple (Acer platanoides) as Specially Regulated
  6. Winged burning bush (Euonymus alatus) as Specially Regulated

Noxious weeds sometimes change categories

The threat of a weed can sometimes change over time and so can their category on the Noxious Weed List. This year, three weeds have changed categories.
  1. Japanese knotweed (Polygonum cuspidatum)  moved from Specially Regulated to Prohibited Control.
  2. Giant knotweed (P. sachalinense) moved from Specially Regulated to Prohibited Control.
  3. Tree of heaven (Ailanthus altissima) moved from Restricted to Prohibited Eradicate.
From Minnesota Department of Agriculture (MDA), St. Paul, MN

--Julie Weisenhorn, Extension Educator, Horticulture,

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