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 ALS inhibitors (B/2) ALS inhibitors (B/2) primisulfuron-methyl Alex Martin
2 525Tall Waterhemp1996Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp
United States
(Nebraska)
NebraskaNE Photosystem II inhibitors (C1/5) Photosystem II inhibitors (C1/5) atrazine Alex Martin
3 5496Horseweed2006Conyza canadensis
Horseweed
United States
(Nebraska)
Nebraska  EPSP synthase inhibitors (G/9) EPSP synthase inhibitors (G/9) glyphosate Stevan Knezevic
4 5594Kochia2009Kochia scoparia
Kochia
United States
(Nebraska)
Nebraska  Synthetic Auxins (O/4) Synthetic Auxins (O/4) dicamba Greg Kruger, Mark Bernards, Roberto Javier Crespo
5 5574Tall Waterhemp2009Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp
United States
(Nebraska)
Nebraska  ALS inhibitors (B/2), Photosystem II inhibitors (C1/5), Synthetic Auxins (O/4) Multiple Resistance: 3 Sites of Action
ALS inhibitors (B/2)
Photosystem II inhibitors (C1/5)
Synthetic Auxins (O/4)
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 EPSP synthase inhibitors (G/9) EPSP synthase inhibitors (G/9) glyphosate Lowell Sandell
7 5694Palmer Amaranth2011Amaranthus palmeri
Palmer Amaranth
United States
(Nebraska)
NebraskaNebraska Photosystem II inhibitors (C1/5) Photosystem II inhibitors (C1/5) atrazine Lowell Sandell
8 5700Palmer Amaranth2011Amaranthus palmeri
Palmer Amaranth
United States
(Nebraska)
NebraskaNebraska HPPD inhibitors (F2/27) HPPD inhibitors (F2/27) mesotrione, tembotrione, topramezone Lowell Sandell
9 5582Tall Waterhemp2011Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp
United States
(Nebraska)
Nebraska  HPPD inhibitors (F2/27) HPPD inhibitors (F2/27) mesotrione, tembotrione, topramezone Stevan Knezevic
10 5585Kochia2011Kochia scoparia
Kochia
United States
(Nebraska)
NebraskaNebraska EPSP synthase inhibitors (G/9) EPSP synthase inhibitors (G/9) glyphosate Lowell Sandell, Greg Kruger
11 5737Tall Waterhemp2012Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp
United States
(Nebraska)
Nebraska  EPSP synthase inhibitors (G/9) EPSP synthase inhibitors (G/9) glyphosate Lowell Sandell
12 8917Common Ragweed2013Ambrosia artemisiifolia
Common Ragweed
United States
(Nebraska)
Nebraska  EPSP synthase inhibitors (G/9) EPSP synthase inhibitors (G/9) glyphosate Lowell Sandell, Greg Kruger
13 9926Kochia2014Kochia scoparia
Kochia
United States
(Nebraska)
Nebraska  Photosystem II inhibitors (C1/5) Photosystem II inhibitors (C1/5) atrazine Greg Kruger, Spencer Samuelson
14 13048Palmer Amaranth2014Amaranthus palmeri
Palmer Amaranth
United States
(Nebraska)
Nebraska  HPPD inhibitors (F2/27), Photosystem II inhibitors (C1/5) Multiple Resistance: 2 Sites of Action
HPPD inhibitors (F2/27)
Photosystem II inhibitors (C1/5)
atrazine, mesotrione, tembotrione, topramezone Stevan Knezevic, Lowell Sandell, Greg Kruger, Amit Jhala
15 17121Tall Waterhemp2016Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp
United States
(Nebraska)
Nebraska  ALS inhibitors (B/2), EPSP synthase inhibitors (G/9), Photosystem II inhibitors (C1/5), PPO inhibitors (E/14) Multiple Resistance: 4 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
Photosystem II inhibitors (C1/5)
PPO inhibitors (E/14)
acifluorfen-sodium, atrazine, chlorimuron-ethyl, fomesafen, glyphosate, imazethapyr, lactofen Amit Jhala, Debalin Sarangi
16 13047Palmer Amaranth2016Amaranthus palmeri
Palmer Amaranth
United States
(Nebraska)
Nebraska  EPSP synthase inhibitors (G/9), Photosystem II inhibitors (C1/5) Multiple Resistance: 2 Sites of Action
EPSP synthase inhibitors (G/9)
Photosystem II inhibitors (C1/5)
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 16, 2019 .  Available  www.weedscience.org
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