International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers

INTRODUCTION Redroot Pigweed

There are currently 25 different types (known as 'biotypes') of herbicide resistant weeds in Minnesota. The first herbicide resistant weed reported from Minnesota is Common Lambsquarters (Chenopodium album) with resistance to atrazine, reported in 1982. The most widespread resistant weed of Minnesota is Redroot Pigweed (Amaranthus retroflexus)and is found primarily in Corn (maize). Tall Waterhemp (Amaranthus tuberculatus (=A. rudis)), with resistance to fomesafen, glyphosate, and lactofen is the most recently discovered (2016) new type of resistant weed in Minnesota.
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Redroot Pigweed (Amaranthus retroflexus) is the most widespread resistant weed of Minnesota
 
About this page

This is a resource page to assist you in managing herbicide-resistant weeds in Minnesota .  If you have any questions regarding herbicide-resistant weeds in Minnesota please contact an expert in your area.   If you have encountered a computer related error on the site then contact support@weedscience.org .  If you are a weed scientist wanting to add or correct information on this page then please contact research@weedscience.org  or add the information directly.

Scroll down this page to view tables on herbicide resistant weeds in Minnesota and its adjacent states as well as a list of articles about herbicide resistant weeds in your region. Click on the links within the table to view a case of resistance in more detail.

 

HERBICIDE RESISTANT WEEDS IN MINNESOTA

WEEDSITUATIONHERBICIDE SITE OF ACTIONYEAR
Common Lambsquarters
(Chenopodium album)
Corn (maize) C1/5 - Photosystem II inhibitors
(atrazine) 
1982 
Velvetleaf
(Abutilon theophrasti)
Corn (maize) C1/5 - Photosystem II inhibitors
(atrazine) 
1991 
Redroot Pigweed
(Amaranthus retroflexus)
Corn (maize) C1/5 - Photosystem II inhibitors
(atrazine) 
1991 
Wild Oat
(Avena fatua)
Sugar beets, Wheat A/1 - ACCase inhibitors
(diclofop-methyl) 
1991 
Common cocklebur
(Xanthium strumarium)
Soybean B/2 - ALS inhibitors
(imazethapyr) 
1994 
Tall Waterhemp
(Amaranthus tuberculatus (=A. rudis))
Soybean B/2 - ALS inhibitors
(imazethapyr, thifensulfuron-methyl) 
1994 
Kochia
(Kochia scoparia)
Cropland, Wheat B/2 - ALS inhibitors
(imazethapyr, thifensulfuron-methyl, tribenuron-methyl) 
1994 
Giant Foxtail
(Setaria faberi)
Corn (maize), Soybean B/2 - ALS inhibitors
(imazethapyr, nicosulfuron, primisulfuron-methyl) 
1996 
Giant Green Foxtail
(Setaria viridis var. major (=var. robusta-alba, var. robustapurpurea))
Corn (maize), Soybean B/2 - ALS inhibitors
(imazethapyr, nicosulfuron, primisulfuron-methyl) 
1996 
Yellow Foxtail
(Setaria pumila (=S. glauca))
Soybean B/2 - ALS inhibitors
(imazethapyr) 
1997 
Common Ragweed
(Ambrosia artemisiifolia)
Soybean B/2 - ALS inhibitors
(cloransulam-methyl, imazethapyr, primisulfuron-methyl) 
1998 
Giant Green Foxtail
(Setaria viridis var. major (=var. robusta-alba, var. robustapurpurea))
Soybean A/1 - ACCase inhibitors
(fenoxaprop-P-ethyl, fluazifop-P-butyl) 
1999 
Giant Green Foxtail
(Setaria viridis var. major (=var. robusta-alba, var. robustapurpurea))
Soybean A/1 - ACCase inhibitors
(fenoxaprop-P-ethyl, fluazifop-P-butyl, sethoxydim) 
1999 
Giant Ragweed
(Ambrosia trifida)
Soybean G/9 - EPSP synthase inhibitors
(glyphosate) 
2006 
Tall Waterhemp
(Amaranthus tuberculatus (=A. rudis))
Soybean G/9 - EPSP synthase inhibitors
(glyphosate) 
2007 
Tall Waterhemp
(Amaranthus tuberculatus (=A. rudis))
Soybean G/9 - EPSP synthase inhibitors
(glyphosate, imazapyr, thifensulfuron-methyl) 
2007 
Tall Waterhemp
(Amaranthus tuberculatus (=A. rudis))
Soybean B/2 - ALS inhibitors
(glyphosate, imazapyr, thifensulfuron-methyl) 
2007 
Giant Ragweed
(Ambrosia trifida)
Soybean G/9 - EPSP synthase inhibitors
(cloransulam-methyl, glyphosate) 
2008 
Common Ragweed
(Ambrosia artemisiifolia)
Soybean G/9 - EPSP synthase inhibitors
(glyphosate) 
2008 
Giant Ragweed
(Ambrosia trifida)
Soybean B/2 - ALS inhibitors
(cloransulam-methyl, glyphosate) 
2008 
Common Ragweed
(Ambrosia artemisiifolia)
Soybean G/9 - EPSP synthase inhibitors
(cloransulam-methyl, glyphosate, imazapyr) 
2010 
Common Ragweed
(Ambrosia artemisiifolia)
Soybean B/2 - ALS inhibitors
(cloransulam-methyl, glyphosate, imazapyr) 
2010 
Tall Waterhemp
(Amaranthus tuberculatus (=A. rudis))
Soybean E/14 - PPO inhibitors
(fomesafen) 
2014 
Tall Waterhemp
(Amaranthus tuberculatus (=A. rudis))
Corn (maize), Soybean E/14 - PPO inhibitors
(fomesafen, glyphosate, lactofen) 
2016 
Tall Waterhemp
(Amaranthus tuberculatus (=A. rudis))
Corn (maize), Soybean G/9 - EPSP synthase inhibitors
(fomesafen, glyphosate, lactofen) 
2016 
 

HERBICIDE RESISTANT WEEDS IN ADJACENT STATES

IOWA
SPECIESSOAYEAR
Kochia  C1/5 1985 
Common Lambsquarters  C1/5 1989 
Pennsylvania Smartweed  C1/5 1990 
Giant Foxtail  C1/5 1992 
Tall Waterhemp  B/2 1993 
Giant Foxtail  A/1 1994 
Common cocklebur  B/2 1995 
Tall Waterhemp  C1/5 1996 
Common Sunflower  B/2 1997 
Shattercane  B/2 1998 
Giant Ragweed  B/2 2000 
Tall Waterhemp  B/2 2009 
Tall Waterhemp  C1/5 2009 
Tall Waterhemp  E/14 2009 
Tall Waterhemp  F2/27 2009 
Tall Waterhemp  G/9 2009 
Giant Ragweed  G/9 2009 
Tall Waterhemp  B/2 2011 
Tall Waterhemp  C1/5 2011 
Tall Waterhemp  F2/27 2011 
Tall Waterhemp  G/9 2011 
Horseweed  G/9 2011 
 
NORTH DAKOTA
SPECIESSOAYEAR
Kochia  B/2 1987 
Green Foxtail  K1/3 1989 
Wild Oat  A/1 1991 
Kochia  O/4 1995 
Wild Oat  B/2 1996 
Kochia  C1/5 1998 
Redroot Pigweed  B/2 1999 
Wild Mustard  B/2 1999 
Eastern Black Nightshade  B/2 1999 
Marshelder  B/2 2003 
Kochia  C1/5 2004 
Kochia  C2/7 2004 
Common Ragweed  G/9 2007 
Tall Waterhemp  G/9 2010 
Kochia  G/9 2012 
 
SOUTH DAKOTA
SPECIESSOAYEAR
Kochia  B/2 1988 
Common Sunflower  B/2 1996 
Common Ragweed  G/9 2007 
Wild Oat  A/1 2009 
Kochia  G/9 2009 
Tall Waterhemp  G/9 2010 
Horseweed  G/9 2010 
Wild Oat  B/2 2011 
Wild Oat  A/1 2012 
Wild Oat  B/2 2012 
 
WISCONSIN
SPECIESSOAYEAR
Common Lambsquarters  C1/5 1979 
Smooth Pigweed  C1/5 1985 
Kochia  C1/5 1987 
Velvetleaf  C1/5 1990 
Giant Foxtail  A/1 1991 
Large Crabgrass  A/1 1992 
Kochia  B/2 1995 
Tall Waterhemp  B/2 1999 
Giant Foxtail  B/2 1999 
Green Foxtail  B/2 1999 
Eastern Black Nightshade  B/2 1999 
Giant Ragweed  G/9 2011 
Palmer Amaranth  G/9 2013 
Tall Waterhemp  G/9 2013 
Common Ragweed  B/2 2013 
Giant Ragweed  B/2 2013 
Horseweed  G/9 2013 
Palmer Amaranth  B/2 2014 
Palmer Amaranth  F2/27 2014 
Tall Waterhemp  E/14 2016 
Tall Waterhemp  G/9 2016 
 
 

FACT SHEETS AND OTHER LITERATURE

Format
  
Herbicide Resistant Weeds .
Jeff Gunsolus (1998)
University of Minnesota - Department of Agronomy and Plant Genetics
 
Resistance of weeds to herbicides is not a unique phenomenon. In fact, resistance to pesticides is a world wide problem that is not confined to any single pest category. The first report of insects resistant to insecticides was in 1908, of plant pathogens resistant to fungicides in 1940, and of weeds resistant to herbicides (triazines) in 1968. By 1991,120 weed biotypes that were resistant to triazine herbicides and 15 other herbicide families were documented throughout the world. Results of a 1.
HTM
  
Agricultural production problems due to herbicide-resistant weeds.
Mike Holmberg (1998)
Successful Farming
 
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HERBICIDE RESISTANT WEED CONTACTS IN MINNESOTA

Your local state university extension agent or local department of agriculture representative may be able to provide you with more information on herbicide-resistant weeds in your region.  Much of the information about herbicide-resistant weeds in Minnesota has been provided by the following experts.

CONTRIBUTING WEED SCIENTISTS

JEFFREY GUNSOLUS

Professor and Extension Weed Scientist
University Of Minnesota
Department of Agronomy and Plant Genetics
411 Borlaug Hall
1991 Upper Buford Circle
St. Paul, 55108, Minnesota

Email Jeffrey Gunsolus
Web   : Web Site Link
KEVIN STASKA

Professor and Extension Weed Scientist
Agrevo Usa Co.
Department of Agronomy and Plant Genetics
Ridgetown Campus
120 Main St. E.,
Bloomington, 55425, Minnesota

Email Kevin Staska
Web   : Web Site Link

ACKNOWLEDGEMENTS

The North American Herbicide Resistance Action Committee and weed scientists in Minnesota have been instrumental in providing you this information.  Particular thanks is given to Jeffrey Gunsolus, and Kevin Staska for providing detailed information.
PERMISSION MUST BE OBTAINED FIRST if you intend to base a significant portion of a scientific paper on data derived from this site.
Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Wednesday, October 18, 2017 .  Available  www.weedscience.org
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