International Survey of Herbicide-Resistant Weeds

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Status of Herbicide Resistance in Wisconsin - David Stoltenberg : July, 2017

Herbicide resistance in common waterhemp and Palmer amaranth are of greatest concern in Wisconsin. The occurrence of glyphosate-resistant common waterhemp has increased rapidly, having been confirmed in populations from 18 counties, including two populations with multiple resistance to glyphosate and PPO inhibitors. Herbicide-resistant Palmer amaranth has been found in three south-central counties, including two populations with glyphosate resistance, and third population with multiple resistance to ALS- and HPPD-inhibitors.

Herbicide Resistant Weeds in Wisconsin, United States.
#YearSpeciesSite of ActionActivesContacts
1 419Common Lambsquarters1979Chenopodium album
Common Lambsquarters		United States
(Wisconsin)		WisconsinWI PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine Jerry Doll (Retired), David Stoltenberg
2 418Smooth Pigweed1985Amaranthus hybridus (syn: quitensis)
Smooth Pigweed		United States
(Wisconsin)		WisconsinWI PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine David Stoltenberg
3 416Kochia1987Kochia scoparia
Kochia		United States
(Wisconsin)		WisconsinWI PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine David Stoltenberg
4 410Velvetleaf1990Abutilon theophrasti
Velvetleaf		United States
(Wisconsin)		WisconsinWI PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine David Stoltenberg
5 415Giant Foxtail1991Setaria faberi
Giant Foxtail		United States
(Wisconsin)		WisconsinWI Inhibition of Acetyl CoA Carboxylase (A/1) Inhibition of Acetyl CoA Carboxylase (A/1) fluazifop-butyl, sethoxydim David Stoltenberg
6 417Large Crabgrass1992Digitaria sanguinalis
Large Crabgrass		United States
(Wisconsin)		WisconsinWI Inhibition of Acetyl CoA Carboxylase (A/1) Inhibition of Acetyl CoA Carboxylase (A/1) fluazifop-butyl, sethoxydim David Stoltenberg
7 1169Kochia1995Kochia scoparia
Kochia		United States
(Wisconsin)		WisconsinWI Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) sulfometuron-methyl Jerry Doll (Retired), David Stoltenberg
8 1170Eastern Black Nightshade1999Solanum ptycanthum
Eastern Black Nightshade		United States
(Wisconsin)		WisconsinWI Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) imazamox, imazethapyr David Stoltenberg, Chris Boerboom (Moved)
9 1171Giant Foxtail1999Setaria faberi
Giant Foxtail		United States
(Wisconsin)		WisconsinWI Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) imazethapyr, nicosulfuron David Stoltenberg, Chris Boerboom (Moved)
10 1172Green Foxtail1999Setaria viridis
Green Foxtail		United States
(Wisconsin)		WisconsinWI Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) imazamox David Stoltenberg, Chris Boerboom (Moved)
11 5090Tall Waterhemp1999Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp		United States
(Wisconsin)		Wisconsin  Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) imazethapyr Jerry Doll (Retired), David Stoltenberg, Chris Boerboom (Moved), Vince Davis (moved)
12 5660Giant Ragweed2011Ambrosia trifida
Giant Ragweed		United States
(Wisconsin)		Wisconsin  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate David Stoltenberg, Vince Davis (moved)
13 7822Giant Ragweed2013Ambrosia trifida
Giant Ragweed		United States
(Wisconsin)		Wisconsin  Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) cloransulam-methyl, imazamox David Stoltenberg, Vince Davis (moved)
14 7823Horseweed2013Conyza canadensis
Horseweed		United States
(Wisconsin)		Wisconsin  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate David Stoltenberg, Vince Davis (moved)
15 10957Palmer Amaranth2013Amaranthus palmeri
Palmer Amaranth		United States
(Wisconsin)		Wisconsin  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate Vince Davis (moved)
16 10958Tall Waterhemp2013Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp		United States
(Wisconsin)		Wisconsin  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate Vince Davis (moved)
17 10981Common Ragweed2013Ambrosia artemisiifolia
Common Ragweed		United States
(Wisconsin)		Wisconsin  Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) cloransulam-methyl David Stoltenberg, Vince Davis (moved), Thomas Butts
18 16099Palmer Amaranth2014Amaranthus palmeri
Palmer Amaranth		United States
(Wisconsin)		Wisconsin  Inhibition of Acetolactate Synthase (B/2), Inhibition of Hydroxyphenyl Pyruvate Dioxygenase (F2/27) Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Hydroxyphenyl Pyruvate Dioxygenase (F2/27) 		imazethapyr, tembotrione, thifensulfuron-methyl David Stoltenberg
19 16100Tall Waterhemp2016Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp		United States
(Wisconsin)		Wisconsin  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9), Inhibition of Protoporphyrinogen Oxidase (E/14) Multiple Resistance: 2 Sites of Action
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
Inhibition of Protoporphyrinogen Oxidase (E/14) 		fomesafen, glyphosate, lactofen David Stoltenberg
20 17155Common Ragweed2017Ambrosia artemisiifolia
Common Ragweed		United States
(Wisconsin)		Wisconsin  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate David Stoltenberg
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Tuesday, April 16, 2024 .  Available  www.weedscience.org
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