International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
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Herbicide Resistant Weeds in Mississippi, United States.
#YearSpeciesSite of ActionActivesContacts
1 251Common cocklebur1989Xanthium strumarium
Common cocklebur
United States
(Mississippi)
MississippiMS Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) imazaquin, imazethapyr Roy Gordon, Charles Snipes
2 250Johnsongrass1991Sorghum halepense
Johnsongrass
United States
(Mississippi)
MississippiMS Inhibition of Acetyl CoA Carboxylase (A/1) Inhibition of Acetyl CoA Carboxylase (A/1) fenoxaprop-ethyl, fluazifop-butyl, quizalofop-ethyl Roy Gordon, Charles Snipes
3 328Johnsongrass1992Sorghum halepense
Johnsongrass
United States
(Mississippi)
MississippiMS Inhibition of Microtubule Assembly 2 (K1/3) Inhibition of Microtubule Assembly 2 (K1/3) pendimethalin John Byrd
4 254Common cocklebur1994Xanthium strumarium
Common cocklebur
United States
(Mississippi)
MississippiMS Nucleic acid inhibitors (Z/17) Nucleic acid inhibitors (Z/17) DSMA, MSMA Charles Snipes
5 255Goosegrass1994Eleusine indica
Goosegrass
United States
(Mississippi)
MississippiMS Inhibition of Microtubule Assembly 2 (K1/3) Inhibition of Microtubule Assembly 2 (K1/3) pendimethalin, trifluralin Charles Snipes
6 1109Horseweed1994Conyza canadensis
Horseweed
United States
(Mississippi)
MississippiMS PS I Electron Diversion (D/22) PS I Electron Diversion (D/22) paraquat Kevin Vaughn : retired
7 526Italian Ryegrass1995Lolium perenne ssp. multiflorum
Italian Ryegrass
United States
(Mississippi)
MississippiMS Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) sulfometuron-methyl James Taylor
8 1187Annual Bluegrass1996Poa annua
Annual Bluegrass
United States
(Mississippi)
MississippiMS PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine, simazine G. Coats
9 5195Horseweed2003Conyza canadensis
Horseweed
United States
(Mississippi)
Mississippi  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate Trey Koger, Thomas Eubank
10 5309Italian Ryegrass2005Lolium perenne ssp. multiflorum
Italian Ryegrass
United States
(Mississippi)
Mississippi  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate Vijay Nandula
11 5384Horseweed2007Conyza canadensis
Horseweed
United States
(Mississippi)
Mississippi  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9), PS I Electron Diversion (D/22) Multiple Resistance: 2 Sites of Action
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
PS I Electron Diversion (D/22)
glyphosate, paraquat Thomas Eubank, Vijay Nandula
12 5558Johnsongrass2008Sorghum halepense
Johnsongrass
United States
(Mississippi)
Mississippi  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate Vijay Nandula
13 5359Palmer Amaranth2008Amaranthus palmeri
Palmer Amaranth
United States
(Mississippi)
Mississippi  Inhibition of Acetolactate Synthase (B/2), Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
glyphosate, pyrithiobac-sodium Trey Koger, Jason Bond, Vijay Nandula
14 5485Tall Waterhemp2010Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp
United States
(Mississippi)
Mississippi  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate Vijay Nandula
15 5503Goosegrass2010Eleusine indica
Goosegrass
United States
(Mississippi)
Mississippi  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate Vijay Nandula, William Molin
16 5504Giant Ragweed2010Ambrosia trifida
Giant Ragweed
United States
(Mississippi)
Mississippi  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate Vijay Nandula
17 16079Redroot Pigweed2010Amaranthus retroflexus
Redroot Pigweed
United States
(Mississippi)
Mississippi  Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) imazethapyr, pyrithiobac-sodium, trifloxysulfuron-Na Vijay Nandula
18 16080Tall Waterhemp2010Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp
United States
(Mississippi)
Mississippi  Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) imazethapyr, pyrithiobac-sodium, trifloxysulfuron-Na Vijay Nandula
19 8901Barnyardgrass2011Echinochloa crus-galli var. crus-galli
Barnyardgrass
United States
(Mississippi)
Mississippi  Inhibition of Acetolactate Synthase (B/2), Inhibition of Acetyl CoA Carboxylase (A/1), Inhibition of Cellulose Synthesis (L/26), PSII inhibitors - Serine 264 Binders (C1 C2/7) Multiple Resistance: 4 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Acetyl CoA Carboxylase (A/1)
Inhibition of Cellulose Synthesis (L/26)
PSII inhibitors - Serine 264 Binders (C1 C2/7)
fenoxaprop-ethyl, imazamox, imazethapyr, propanil, quinclorac (MOA in monocots) Jason Bond, Vijay Nandula
20 5682Spiny Amaranth2012Amaranthus spinosus
Spiny Amaranth
United States
(Mississippi)
MississippiMississippi Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate Vijay Nandula
21 16081Spiny Amaranth2013Amaranthus spinosus
Spiny Amaranth
United States
(Mississippi)
Mississippi  Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) imazethapyr, nicosulfuron, pyrithiobac-sodium, trifloxysulfuron-Na Vijay Nandula
22 8900Common Ragweed2014Ambrosia artemisiifolia
Common Ragweed
United States
(Mississippi)
Mississippi  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate Thomas Eubank, Jason Bond, Vijay Nandula
23 10982Annual Bluegrass2014Poa annua
Annual Bluegrass
United States
(Mississippi)
Mississippi  Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) foramsulfuron Te-Ming Paul Tseng, Jay McCurdy
Contributing Weed Scientists
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Monday, November 29, 2021 .  Available  www.weedscience.org
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