1
| 400 | Goosegrass | 1989 | Eleusine indica Goosegrass | United States (Arkansas) | Arkansas | AR | Microtubule inhibitors (K1/3) |
Microtubule inhibitors (K1/3)
| trifluralin | Ronald Talbert : Retired, Ford Baldwin |
2
| 404 | Common cocklebur | 1989 | Xanthium strumarium Common cocklebur | United States (Arkansas) | Arkansas | AR | Nucleic acid inhibitors (Z/17) |
Nucleic acid inhibitors (Z/17)
| MSMA | Ronald Talbert : Retired, Ford Baldwin |
3
| 399 | Barnyardgrass | 1990 | Echinochloa crus-galli var. crus-galli Barnyardgrass | United States (Arkansas) | Arkansas | AR | PSII inhibitor (Ureas and amides) (C2/7) |
PSII inhibitor (Ureas and amides) (C2/7)
| propanil | Ronald Talbert : Retired, Ford Baldwin |
4
| 403 | Palmer Amaranth | 1994 | Amaranthus palmeri Palmer Amaranth | United States (Arkansas) | Arkansas | AR | ALS inhibitors (B/2) |
ALS inhibitors (B/2)
| chlorimuron-ethyl, diclosulam, imazaquin, imazethapyr, pyrithiobac-sodium | Ronald Talbert : Retired, Nilda R. Burgos |
5
| 401 | Common cocklebur | 1995 | Xanthium strumarium Common cocklebur | United States (Arkansas) | Arkansas | AR | ALS inhibitors (B/2) |
ALS inhibitors (B/2)
| imazaquin | Ronald Talbert : Retired, Ford Baldwin |
6
| 402 | Redroot Pigweed | 1995 | Amaranthus retroflexus Redroot Pigweed | United States (Arkansas) | Arkansas | AR | ALS inhibitors (B/2) |
ALS inhibitors (B/2)
| imazaquin | Ronald Talbert : Retired, Ford Baldwin |
7
| 1097 | Italian Ryegrass | 1995 | Lolium perenne ssp. multiflorum Italian Ryegrass | United States (Arkansas) | Arkansas | AR | ACCase inhibitors (A/1), ALS inhibitors (B/2) |
Multiple Resistance: 2 Sites of Action ACCase inhibitors (A/1) ALS inhibitors (B/2)
| chlorsulfuron, diclofop-methyl, fenoxaprop-P-ethyl | Nilda R. Burgos, Robert Scott |
8
| 1188 | Barnyardgrass | 1999 | Echinochloa crus-galli var. crus-galli Barnyardgrass | United States (Arkansas) | Arkansas | AR | PSII inhibitor (Ureas and amides) (C2/7), Synthetic Auxins (O/4) |
Multiple Resistance: 2 Sites of Action PSII inhibitor (Ureas and amides) (C2/7) Synthetic Auxins (O/4)
| propanil, quinclorac | Ford Baldwin, Nilda R. Burgos |
9
| 13046 | Red Rice | 2002 | Oryza sativa var. sylvatica Red Rice | United States (Arkansas) | Arkansas | | ALS inhibitors (B/2) |
ALS inhibitors (B/2)
| imazamox, imazapyr, imazaquin, imazethapyr, pyrithiobac-sodium | Nilda R. Burgos |
10
| 5187 | Horseweed | 2003 | Conyza canadensis Horseweed | United States (Arkansas) | Arkansas | | EPSP synthase inhibitors (G/9) |
EPSP synthase inhibitors (G/9)
| glyphosate | Ronald Talbert : Retired |
11
| 5399 | Italian Ryegrass | 2003 | Lolium perenne ssp. multiflorum Italian Ryegrass | United States (Arkansas) | Arkansas | | ALS inhibitors (B/2) |
ALS inhibitors (B/2)
| chlorsulfuron, imazamox, mesosulfuron-methyl, sulfometuron-methyl | Nilda R. Burgos, Robert Scott |
12
| 5261 | Common Ragweed | 2004 | Ambrosia artemisiifolia Common Ragweed | United States (Arkansas) | Arkansas | | EPSP synthase inhibitors (G/9) |
EPSP synthase inhibitors (G/9)
| glyphosate | Nilda R. Burgos |
13
| 5409 | Italian Ryegrass | 2005 | Lolium perenne ssp. multiflorum Italian Ryegrass | United States (Arkansas) | Arkansas | Arkansas | ACCase inhibitors (A/1) |
ACCase inhibitors (A/1)
| clodinafop-propargyl, diclofop-methyl, pinoxaden | Nilda R. Burgos, Robert Scott |
14
| 5345 | Giant Ragweed | 2005 | Ambrosia trifida Giant Ragweed | United States (Arkansas) | Arkansas | | EPSP synthase inhibitors (G/9) |
EPSP synthase inhibitors (G/9)
| glyphosate | Robert Scott, Jason Norsworthy |
15
| 5296 | Palmer Amaranth | 2006 | Amaranthus palmeri Palmer Amaranth | United States (Arkansas) | Arkansas | | EPSP synthase inhibitors (G/9) |
EPSP synthase inhibitors (G/9)
| glyphosate | Robert Scott, Jason Norsworthy, Kenneth Smith |
16
| 5344 | Johnsongrass | 2007 | Sorghum halepense Johnsongrass | United States (Arkansas) | Arkansas | | EPSP synthase inhibitors (G/9) |
EPSP synthase inhibitors (G/9)
| glyphosate | Robert Scott, Jason Norsworthy |
17
| 5401 | Italian Ryegrass | 2008 | Lolium perenne ssp. multiflorum Italian Ryegrass | United States (Arkansas) | Arkansas | Arkansas | EPSP synthase inhibitors (G/9) |
EPSP synthase inhibitors (G/9)
| glyphosate | Nilda R. Burgos, Robert Scott |
18
| 5563 | Barnyardgrass | 2008 | Echinochloa crus-galli var. crus-galli Barnyardgrass | United States (Arkansas) | Arkansas | | DOXP inhibitors (F4/13) |
DOXP inhibitors (F4/13)
| clomazone | Jason Norsworthy |
19
| 5560 | Rice Flatsedge | 2010 | Cyperus iria Rice Flatsedge | United States (Arkansas) | Arkansas | | ALS inhibitors (B/2) |
ALS inhibitors (B/2)
| bispyribac-sodium, halosulfuron-methyl, imazamox, imazethapyr, penoxsulam | Jason Norsworthy |
20
| 5562 | Smallflower Umbrella Sedge | 2010 | Cyperus difformis Smallflower Umbrella Sedge | United States (Arkansas) | Arkansas | | ALS inhibitors (B/2) |
ALS inhibitors (B/2)
| halosulfuron-methyl | Jason Norsworthy |
21
| 10956 | Junglerice | 2011 | Echinochloa colona Junglerice | United States (Arkansas) | Arkansas | | ALS inhibitors (B/2), Cellulose inhibitors (L/26), PSII inhibitor (Ureas and amides) (C2/7) |
Multiple Resistance: 3 Sites of Action ALS inhibitors (B/2) Cellulose inhibitors (L/26) PSII inhibitor (Ureas and amides) (C2/7)
| imazethapyr, propanil, quinclorac (MOA in monocots) | Nilda R. Burgos |
22
| 11006 | Palmer Amaranth | 2011 | Amaranthus palmeri Palmer Amaranth | United States (Arkansas) | Arkansas | | ALS inhibitors (B/2), PPO inhibitors (E/14) |
Multiple Resistance: 2 Sites of Action ALS inhibitors (B/2) PPO inhibitors (E/14)
| fomesafen, pyrithiobac-sodium, trifloxysulfuron-sodium | Nilda R. Burgos, Robert Scott, Jason Norsworthy, Reiofeli Salas, Tom Barber |
23
| 6752 | Yellow Nutsedge | 2013 | Cyperus esculentus Yellow Nutsedge | United States (Arkansas) | Arkansas | | ALS inhibitors (B/2) |
ALS inhibitors (B/2)
| halosulfuron-methyl | Jason Norsworthy, Parsa Tehranchian |
24
| 10980 | Tall Waterhemp | 2015 | Amaranthus tuberculatus (=A. rudis) Tall Waterhemp | United States (Arkansas) | Arkansas | | EPSP synthase inhibitors (G/9) |
EPSP synthase inhibitors (G/9)
| glyphosate | Jason Norsworthy |
25
| 18156 | Palmer Amaranth | 2016 | Amaranthus palmeri Palmer Amaranth | United States (Arkansas) | Arkansas | | ALS inhibitors (B/2), EPSP synthase inhibitors (G/9), Long chain fatty acid inhibitors (K3/15), Microtubule inhibitors (K1/3), PPO inhibitors (E/14) |
Multiple Resistance: 5 Sites of Action ALS inhibitors (B/2) EPSP synthase inhibitors (G/9) Long chain fatty acid inhibitors (K3/15) Microtubule inhibitors (K1/3) PPO inhibitors (E/14)
| acifluorfen-sodium, carfentrazone-ethyl, flumetsulam, fluthiacet-methyl, fomesafen, glyphosate, imazethapyr, lactofen, pendimethalin, pyraflufen-ethyl, pyrithiobac-sodium, S-metolachlor, trifloxysulfuron-sodium | Nilda R. Burgos, Matthew Bertucci, Cammy Willett , Badou Jeremie Kouame |
26
| 18154 | Palmer Amaranth | 2017 | Amaranthus palmeri Palmer Amaranth | United States (Arkansas) | Arkansas | | Long chain fatty acid inhibitors (K3/15) |
Long chain fatty acid inhibitors (K3/15)
| S-metolachlor | Jason Norsworthy, Vijay Varanasi, Tom Barber, Chad Brabham, Michael Houston |