International Survey of Herbicide-Resistant Weeds

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Friday, April 26, 2024

INTRODUCTION		Kochia
There are currently 10 different types (known as 'biotypes') of herbicide resistant weeds in South Dakota. The first herbicide resistant weed reported from South Dakota is Kochia (Kochia scoparia) with resistance to chlorsulfuron, reported in 1988. The most widespread resistant weed of South Dakota is Kochia (Kochia scoparia)and is found primarily in Cropland, and Wheat. Wild Oat (Avena fatua), with resistance to fenoxaprop-ethyl, and mesosulfuron-methyl is the most recently discovered (2012) new type of resistant weed in South Dakota.		Kochia (Kochia scoparia) is the most widespread resistant weed of South Dakota

About this page
This is a resource page to assist you in managing herbicide-resistant weeds in South Dakota . If you have any questions regarding herbicide-resistant weeds in South Dakota 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 South Dakota 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 SOUTH DAKOTA
WEED	SITUATION	HERBICIDE SITE OF ACTION	YEAR
Kochia (Kochia scoparia)	Cropland, Wheat	B/2 - Inhibition of Acetolactate Synthase (chlorsulfuron)	1988
Common Sunflower (Helianthus annuus)	Cropland	B/2 - Inhibition of Acetolactate Synthase (imazethapyr)	1996
Common Ragweed (Ambrosia artemisiifolia)	Corn (maize), Soybean	G/9 - Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (glyphosate)	2007
Wild Oat (Avena fatua)	Cereals	A/1 - Inhibition of Acetyl CoA Carboxylase (fenoxaprop-ethyl)	2009
Kochia (Kochia scoparia)	Corn (maize), Soybean	G/9 - Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (glyphosate)	2009
Tall Waterhemp (Amaranthus tuberculatus (=A. rudis))	Corn (maize), Soybean	G/9 - Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (glyphosate)	2010
Horseweed (Conyza canadensis)	Corn (maize), Soybean	G/9 - Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (glyphosate)	2010
Wild Oat (Avena fatua)	Cereals	B/2 - Inhibition of Acetolactate Synthase (mesosulfuron-methyl)	2011
Wild Oat (Avena fatua)	Wheat	B/2 - Inhibition of Acetolactate Synthase (fenoxaprop-ethyl, mesosulfuron-methyl)	2012
Wild Oat (Avena fatua)	Wheat	A/1 - Inhibition of Acetyl CoA Carboxylase (fenoxaprop-ethyl, mesosulfuron-methyl)	2012

HERBICIDE RESISTANT WEEDS IN ADJACENT STATES

IOWA
SPECIES	SOA	YEAR
Kochia	C1 C2/5	1985
Common Lambsquarters	C1 C2/5	1989
Pennsylvania Smartweed	C1 C2/5	1990
Giant Foxtail	C1 C2/5	1992
Tall Waterhemp	B/2	1993
Giant Foxtail	A/1	1994
Common cocklebur	B/2	1995
Tall Waterhemp	C1 C2/5	1996
Common Sunflower	B/2	1997
Shattercane	B/2	1998
Giant Ragweed	B/2	2000
Tall Waterhemp	B/2	2009
Tall Waterhemp	C1 C2/5	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 C2/5	2011
Tall Waterhemp	F2/27	2011
Tall Waterhemp	G/9	2011
Horseweed	G/9	2011
Tall Waterhemp	O/4	2021
Palmer Amaranth	B/2	2022
Palmer Amaranth	C1 C2/5	2022
Palmer Amaranth	F2/27	2022
Palmer Amaranth	G/9	2022

MINNESOTA
SPECIES	SOA	YEAR
Common Lambsquarters	C1 C2/5	1982
Velvetleaf	C1 C2/5	1991
Redroot Pigweed	C1 C2/5	1991
Wild Oat	A/1	1991
Tall Waterhemp	B/2	1994
Kochia	B/2	1994
Common cocklebur	B/2	1994
Giant Foxtail	B/2	1996
Giant Green Foxtail	B/2	1996
Yellow Foxtail	B/2	1997
Common Ragweed	B/2	1998
Giant Green Foxtail	A/1	1999
Giant Green Foxtail	A/1	1999
Giant Ragweed	G/9	2006
Tall Waterhemp	B/2	2007
Tall Waterhemp	G/9	2007
Tall Waterhemp	G/9	2007
Common Ragweed	G/9	2008
Giant Ragweed	B/2	2008
Giant Ragweed	G/9	2008
Common Ragweed	B/2	2010
Common Ragweed	G/9	2010
Tall Waterhemp	E/14	2014
Tall Waterhemp	E/14	2016
Tall Waterhemp	G/9	2016

MONTANA
SPECIES	SOA	YEAR
Kochia	C1 C2/5	1984
Russian-thistle	B/2	1987
Kochia	B/2	1989
Wild Oat	K3 N/15	1990
Wild Oat	Z/8	1990
Persian Darnel	A/1	1993
Kochia	O/4	1994
Wild Oat	B/2	1996
Wild Oat	A/1	2002
Green Foxtail	A/1	2005
Kochia	G/9	2012
Kochia	B/2	2013
Kochia	G/9	2013
Horseweed	G/9	2015
Russian-thistle	G/9	2015
Downy Brome (Cheatgrass)	B/2	2016

NORTH DAKOTA
SPECIES	SOA	YEAR
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 C2/5	1998
Redroot Pigweed	B/2	1999
Wild Mustard	B/2	1999
Eastern Black Nightshade	B/2	1999
Marshelder	B/2	2003
Kochia	C1 C2/5	2004
Common Ragweed	G/9	2007
Tall Waterhemp	G/9	2010
Kochia	G/9	2012

NEBRASKA
SPECIES	SOA	YEAR
Shattercane	B/2	1994
Tall Waterhemp	C1 C2/5	1996
Horseweed	G/9	2006
Tall Waterhemp	B/2	2009
Tall Waterhemp	C1 C2/5	2009
Tall Waterhemp	O/4	2009
Kochia	O/4	2009
Giant Ragweed	G/9	2010
Palmer Amaranth	C1 C2/5	2011
Palmer Amaranth	F2/27	2011
Tall Waterhemp	F2/27	2011
Kochia	G/9	2011
Tall Waterhemp	G/9	2012
Common Ragweed	G/9	2013
Palmer Amaranth	C1 C2/5	2014
Palmer Amaranth	F2/27	2014
Kochia	C1 C2/5	2014
Palmer Amaranth	C1 C2/5	2016
Palmer Amaranth	G/9	2016
Tall Waterhemp	B/2	2016
Tall Waterhemp	C1 C2/5	2016
Tall Waterhemp	E/14	2016
Tall Waterhemp	G/9	2016

WYOMING
SPECIES	SOA	YEAR
Kochia	C1 C2/5	1984
Kochia	B/2	1996
Kochia	G/9	2014

FACT SHEETS AND OTHER LITERATURE

Format

HERBICIDE RESISTANT WEED CONTACTS IN SOUTH DAKOTA

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 South Dakota has been provided by the following experts.

CONTRIBUTING WEED SCIENTISTS

MIKE MOECHNIG
Associate Professor South Dakota State University Plant Science 229 Berg Ag Hall Box 2207A Brookings, 57007, South Dakota Email Mike Moechnig Web : Web Site Link

LEON WRAGE : RETIRED
Extension Emeritus South Dakota State University Agriculture Plant Science-Box 2140C Brookings, 57007, South Dakota Email Leon Wrage : retired Web : Web Site Link

ACKNOWLEDGEMENTS
The North American Herbicide Resistance Action Committee and weed scientists in South Dakota have been instrumental in providing you this information. Particular thanks is given to Mike Moechnig, and Leon Wrage : retired for providing detailed information.

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Cite this site as: Heap, I. The International Survey of Herbicide Resistant Weeds. Online. Internet. Friday, April 26, 2024 . Available www.weedscience.org
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