International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
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Herbicide Resistant Weeds in Georgia, United States.
#YearSpeciesSite of ActionActivesContacts
1 1043Goosegrass1992Eleusine indica
Goosegrass
United States
(Georgia)
Georgia  Inhibition of Microtubule Assembly 2 (K1/3) Inhibition of Microtubule Assembly 2 (K1/3) trifluralin David Bridges
2 325Prickly Sida1993Sida spinosa
Prickly Sida
United States
(Georgia)
Georgia  Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) imazaquin David Bridges
3 543Italian Ryegrass1995Lolium perenne ssp. multiflorum
Italian Ryegrass
United States
(Georgia)
Georgia  Inhibition of Acetyl CoA Carboxylase (A/1) Inhibition of Acetyl CoA Carboxylase (A/1) diclofop-methyl, sethoxydim Greg Macdonald, William Vencill, Eric Prostko
4 5092Palmer Amaranth2000Amaranthus palmeri
Palmer Amaranth
United States
(Georgia)
Georgia  Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) imazapic, imazethapyr William Vencill, Eric Prostko
5 5256Palmer Amaranth2005Amaranthus palmeri
Palmer Amaranth
United States
(Georgia)
Georgia  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate Stanley Culpepper
6 5498Palmer Amaranth2008Amaranthus palmeri
Palmer Amaranth
United States
(Georgia)
Georgia  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 Stanley Culpepper, Lynn Sosnoskie
7 5499Palmer Amaranth2008Amaranthus palmeri
Palmer Amaranth
United States
(Georgia)
Georgia  PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine William Vencill
8 7787Large Crabgrass2008Digitaria sanguinalis
Large Crabgrass
United States
(Georgia)
Georgia  Inhibition of Acetyl CoA Carboxylase (A/1) Inhibition of Acetyl CoA Carboxylase (A/1) sethoxydim William Vencill
9 5500Italian Ryegrass2009Lolium perenne ssp. multiflorum
Italian Ryegrass
United States
(Georgia)
Georgia  Inhibition of Acetolactate Synthase (B/2), Inhibition of Acetyl CoA Carboxylase (A/1) Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Acetyl CoA Carboxylase (A/1)
diclofop-methyl, mesosulfuron-methyl Stanley Culpepper
10 7788Palmer Amaranth2010Amaranthus palmeri
Palmer Amaranth
United States
(Georgia)
Georgia  Inhibition of Acetolactate Synthase (B/2), Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9), PSII inhibitors - Serine 264 Binders (C1 C2/5) Multiple Resistance: 3 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
PSII inhibitors - Serine 264 Binders (C1 C2/5)
atrazine, glyphosate, imazapic, pyrithiobac-sodium William Vencill, Eric Prostko
11 13035Spotted Spurge2014Chamaesyce maculata
Spotted Spurge
United States
(Georgia)
Georgia  Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) metsulfuron-methyl Scott Mcelroy
Contributing Weed Scientists
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Saturday, November 27, 2021 .  Available  www.weedscience.org
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