No. 1 Article 7/March 16, 2005

New Publication on the Biology and Management of Horseweed (Marestail)

Horseweed, commonly referred to as marestail, presents serious problems for no-till soybean production in several states in the Midwest, including Illinois. Glyphosate-resistant horseweed have been documented to the east and south of Illinois, yet none have been reported in Illinois. A recent collaboration among Midwest weed scientists has resulted in the development of a publication that contains timely and accurate information on herbicide resistance and the latest on the biology of this weed, along with management strategies. This publication can be viewed at or at If you would like to order this publication, please contact us for information.

--Dawn Nordby and Aaron Hager

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