International Survey of Herbicide-Resistant Weeds

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Status of Herbicide Resistance in Nebraska - Lowell Sandell : February, 2014

Nebraska is probably somewhat behind on total acres of glyphosate-resistant weed species relative to other states in the south and Midwest, but conformation of glyphosate-resistant populations has been steady over the last 3 years. The top weeds of concern in NE are glyphosate resistant marestail, waterhemp and kochia. Of particular note are isolated populations of HPPD resistant waterhemp and Palmer amaranth and synthetic auxin resistant waterhemp and kochia. But these cases further bolster the need for diversified management to maintain the effectiveness of all modes of action.
Herbicide Resistant Weeds in Nebraska, United States.
#YearSpeciesSite of ActionActivesContacts
1 474Shattercane1994Sorghum bicolor
Shattercane		United States
(Nebraska)		NebraskaNE Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) primisulfuron-methyl Alex Martin
2 525Tall Waterhemp1996Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp		United States
(Nebraska)		NebraskaNE PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine Alex Martin
3 5496Horseweed2006Conyza canadensis
Horseweed		United States
(Nebraska)		Nebraska  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate Stevan Knezevic
4 5594Kochia2009Kochia scoparia
Kochia		United States
(Nebraska)		Nebraska  Auxin Mimics (O/4) Auxin Mimics (O/4) dicamba Greg Kruger, Mark Bernards, Roberto Javier Crespo
5 5574Tall Waterhemp2009Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp		United States
(Nebraska)		Nebraska  Auxin Mimics (O/4), Inhibition of Acetolactate Synthase (B/2), PSII inhibitors - Serine 264 Binders (C1 C2/5) Multiple Resistance: 3 Sites of Action
Auxin Mimics (O/4)
Inhibition of Acetolactate Synthase (B/2)
PSII inhibitors - Serine 264 Binders (C1 C2/5) 		2,4-D, aminopyralid, atrazine, chlorimuron-ethyl, imazethapyr, picloram Lowell Sandell, Greg Kruger, Mark Bernards, Roberto Javier Crespo
6 5573Giant Ragweed2010Ambrosia trifida
Giant Ragweed		United States
(Nebraska)		NebraskaNebraska Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate Lowell Sandell
7 5694Palmer Amaranth2011Amaranthus palmeri
Palmer Amaranth		United States
(Nebraska)		NebraskaNebraska PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine Lowell Sandell
8 5700Palmer Amaranth2011Amaranthus palmeri
Palmer Amaranth		United States
(Nebraska)		NebraskaNebraska Inhibition of Hydroxyphenyl Pyruvate Dioxygenase (F2/27) Inhibition of Hydroxyphenyl Pyruvate Dioxygenase (F2/27) mesotrione, tembotrione, topramezone Lowell Sandell
9 5582Tall Waterhemp2011Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp		United States
(Nebraska)		Nebraska  Inhibition of Hydroxyphenyl Pyruvate Dioxygenase (F2/27) Inhibition of Hydroxyphenyl Pyruvate Dioxygenase (F2/27) mesotrione, tembotrione, topramezone Stevan Knezevic
10 5585Kochia2011Kochia scoparia
Kochia		United States
(Nebraska)		NebraskaNebraska Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate Lowell Sandell, Greg Kruger
11 5737Tall Waterhemp2012Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp		United States
(Nebraska)		Nebraska  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate Lowell Sandell
12 8917Common Ragweed2013Ambrosia artemisiifolia
Common Ragweed		United States
(Nebraska)		Nebraska  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate Lowell Sandell, Greg Kruger
13 9926Kochia2014Kochia scoparia
Kochia		United States
(Nebraska)		Nebraska  PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine Greg Kruger, Spencer Samuelson
14 13048Palmer Amaranth2014Amaranthus palmeri
Palmer Amaranth		United States
(Nebraska)		Nebraska  Inhibition of Hydroxyphenyl Pyruvate Dioxygenase (F2/27), PSII inhibitors - Serine 264 Binders (C1 C2/5) Multiple Resistance: 2 Sites of Action
Inhibition of Hydroxyphenyl Pyruvate Dioxygenase (F2/27)
PSII inhibitors - Serine 264 Binders (C1 C2/5) 		atrazine, mesotrione, tembotrione, topramezone Stevan Knezevic, Lowell Sandell, Greg Kruger, Amit Jhala
15 17121Tall Waterhemp2016Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp		United States
(Nebraska)		Nebraska  Inhibition of Acetolactate Synthase (B/2), Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9), Inhibition of Protoporphyrinogen Oxidase (E/14), PSII inhibitors - Serine 264 Binders (C1 C2/5) Multiple Resistance: 4 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
Inhibition of Protoporphyrinogen Oxidase (E/14)
PSII inhibitors - Serine 264 Binders (C1 C2/5) 		acifluorfen, atrazine, chlorimuron-ethyl, fomesafen, glyphosate, imazethapyr, lactofen Amit Jhala, Debalin Sarangi
16 13047Palmer Amaranth2016Amaranthus palmeri
Palmer Amaranth		United States
(Nebraska)		Nebraska  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9), PSII inhibitors - Serine 264 Binders (C1 C2/5) Multiple Resistance: 2 Sites of Action
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
PSII inhibitors - Serine 264 Binders (C1 C2/5) 		atrazine, glyphosate Amit Jhala, Parminder Chahal, Vijay Varanasi, Mithila Jugulam
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Saturday, November 23, 2024 .  Available  www.weedscience.org
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