1
| Belgium | Belgium | | 1989 |
Corn (maize), Nurseries, and Roadsides
|
atrazine
| 3 |
PSII inhibitors - Serine 264 Binders
( HRAC Group 5 (Legacy C1 C2)
| 61 | Conyza canadensis | Horseweed | 35 |
2
| Belgium | Belgium | | 1998 |
Nurseries
|
paraquat
| 3 |
PS I Electron Diversion
( HRAC Group 22 (Legacy D)
| 61 | Conyza canadensis | Horseweed | 1145 |
3
| Brazil | Brazil | | 2005 |
Fruit, Orchards, and Soybean
|
glyphosate
| 5 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5273 |
4
| Canada (Ontario) | Canada | Ontario | 1993 |
Peaches
|
paraquat
| 7 |
PS I Electron Diversion
( HRAC Group 22 (Legacy D)
| 61 | Conyza canadensis | Horseweed | 48 |
5
| Canada (Ontario) | Canada | Ontario | 2010 |
Soybean
|
glyphosate
| 7 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5665 |
6
| Canada (Ontario) | Canada | Ontario | 2011 |
Soybean
|
cloransulam-methyl, and glyphosate
| 7 |
Multiple Resistance: 2 Sites of Action Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5666 |
7
| China | China | | 2006 |
Orchards
|
glyphosate
| 9 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5277 |
8
| Czech Republic | Czech Republic | | 1987 |
Corn (maize), Nurseries, Orchards, Pastures, Railways, and Roadsides
|
atrazine
| 12 |
PSII inhibitors - Serine 264 Binders
( HRAC Group 5 (Legacy C1 C2)
| 61 | Conyza canadensis | Horseweed | 83 |
9
| Czech Republic | Czech Republic | | 2007 |
Railways
|
glyphosate
| 12 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5317 |
10
| France | France | | 1981 |
Cropland
|
atrazine
| 17 |
PSII inhibitors - Serine 264 Binders
( HRAC Group 5 (Legacy C1 C2)
| 61 | Conyza canadensis | Horseweed | 460 |
11
| France | France | | 1988 |
Orchards
|
linuron
| 17 |
PSII inhibitors - Serine 264 Binders
( HRAC Group 5 (Legacy C1 C2)
| 61 | Conyza canadensis | Horseweed | 451 |
12
| France | France | | 2019 |
Grapes
|
glyphosate
| 17 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 18198 |
13
| Greece | Greece | | 2012 |
Grapes, and Orchards
|
glyphosate
| 19 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5692 |
14
| Hungary | Hungary | | 2016 |
Grapes
|
glyphosate
| 20 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 15070 |
15
| Israel | Israel | | 1993 |
Forests, Industrial sites, and Roadsides
|
atrazine, chlorsulfuron, imazapyr, metribuzin, pyrithiobac-sodium, and sulfometuron-methyl
| 23 |
Multiple Resistance: 2 Sites of Action Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B) PSII inhibitors - Serine 264 Binders
( HRAC Group 5 (Legacy C1 C2)
| 61 | Conyza canadensis | Horseweed | 109 |
16
| Italy | Italy | | 2011 |
Orchards
|
glyphosate
| 24 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5617 |
17
| Japan | Japan | | 1980 |
Grapes, Orchards, Railways, and Roadsides
|
paraquat
| 25 |
PS I Electron Diversion
( HRAC Group 22 (Legacy D)
| 61 | Conyza canadensis | Horseweed | 119 |
18
| Japan | Japan | | 2014 |
Railways
|
glyphosate
| 25 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 10999 |
19
| Poland | Poland | | 1983 |
Orchards
|
simazine
| 33 |
PSII inhibitors - Serine 264 Binders
( HRAC Group 5 (Legacy C1 C2)
| 61 | Conyza canadensis | Horseweed | 168 |
20
| Poland | Poland | | 2000 |
Railways
|
imazapyr
| 33 |
Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B)
| 61 | Conyza canadensis | Horseweed | 5081 |
21
| Poland | Poland | | 2010 |
Railways
|
glyphosate
| 33 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5622 |
22
| Portugal | Portugal | | 2011 |
Olive
|
glyphosate
| 34 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 7824 |
23
| South Korea | South Korea | | 2017 |
Orchards
|
glyphosate
| 27 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 16077 |
24
| Spain | Spain | | 1987 |
Corn (maize), Orchards, and Roadsides
|
atrazine, and simazine
| 38 |
PSII inhibitors - Serine 264 Binders
( HRAC Group 5 (Legacy C1 C2)
| 61 | Conyza canadensis | Horseweed | 177 |
25
| Spain | Spain | | 2006 |
Orchards
|
glyphosate
| 38 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5319 |
26
| Switzerland | Switzerland | | 1982 |
Corn (maize), Nurseries, Orchards, Pastures, Railways, and Roadsides
|
atrazine, and simazine
| 41 |
PSII inhibitors - Serine 264 Binders
( HRAC Group 5 (Legacy C1 C2)
| 61 | Conyza canadensis | Horseweed | 203 |
27
| Switzerland | Switzerland | | 2021 |
Grapes
|
glyphosate
| 41 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 24248 |
28
| United Kingdom | United Kingdom | | 1982 |
Orchards
|
simazine
| 44 |
PSII inhibitors - Serine 264 Binders
( HRAC Group 5 (Legacy C1 C2)
| 61 | Conyza canadensis | Horseweed | 362 |
29
| United States (Mississippi) | United States | Mississippi | 1994 |
Soybean
|
paraquat
| 45 |
PS I Electron Diversion
( HRAC Group 22 (Legacy D)
| 61 | Conyza canadensis | Horseweed | 1109 |
30
| United States (Delaware) | United States | Delaware | 2000 |
Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5086 |
31
| United States (Tennessee) | United States | Tennessee | 2001 |
Cotton, and Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5122 |
32
| United States (Ohio) | United States | Ohio | 2001 |
Soybean
|
chlorimuron-ethyl, and cloransulam-methyl
| 45 |
Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B)
| 61 | Conyza canadensis | Horseweed | 5157 |
33
| United States (Kentucky) | United States | Kentucky | 2001 |
Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5208 |
34
| United States (Ohio) | United States | Ohio | 2002 |
Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5127 |
35
| United States (Indiana) | United States | Indiana | 2002 |
Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5128 |
36
| United States (Maryland) | United States | Maryland | 2002 |
Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5129 |
37
| United States (New Jersey) | United States | New Jersey | 2002 |
Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5130 |
38
| United States (Michigan) | United States | Michigan | 2002 |
Corn (maize), and Soybean
|
chlorimuron-ethyl, and cloransulam-methyl
| 45 |
Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B)
| 61 | Conyza canadensis | Horseweed | 5172 |
39
| United States (Michigan) | United States | Michigan | 2002 |
Blueberries
|
atrazine, diuron, and simazine
| 45 |
PSII inhibitors - Serine 264 Binders
( HRAC Group 5 (Legacy C1 C2)
| 61 | Conyza canadensis | Horseweed | 5173 |
40
| United States (Michigan) | United States | Michigan | 2002 |
Blueberries
|
diuron
| 45 |
PSII inhibitors - Serine 264 Binders
( HRAC Group 5 (Legacy C1 C2)
| 61 | Conyza canadensis | Horseweed | 5174 |
41
| United States (Missouri) | United States | Missouri | 2002 |
Corn (maize), Cotton, and Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5260 |
42
| United States (Ohio) | United States | Ohio | 2003 |
Soybean
|
chlorimuron-ethyl, cloransulam-methyl, and glyphosate
| 45 |
Multiple Resistance: 2 Sites of Action Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5158 |
43
| United States (Arkansas) | United States | Arkansas | 2003 |
Cotton
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5187 |
44
| United States (Mississippi) | United States | Mississippi | 2003 |
Corn (maize), Cotton, Rice, and Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5195 |
45
| United States (North Carolina) | United States | North Carolina | 2003 |
Cotton
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5200 |
46
| United States (Delaware) | United States | Delaware | 2003 |
Soybean
|
paraquat
| 45 |
PS I Electron Diversion
( HRAC Group 22 (Legacy D)
| 61 | Conyza canadensis | Horseweed | 5257 |
47
| United States (Pennsylvania) | United States | Pennsylvania | 2003 |
Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5258 |
48
| United States (California) | United States | California | 2005 |
Corn (maize), Fencelines, Grapes, Orchards, Roadsides, and Wheat
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5250 |
49
| United States (Illinois) | United States | Illinois | 2005 |
Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5276 |
50
| United States (Kansas) | United States | Kansas | 2005 |
Cotton, and Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5308 |
51
| United States (Virginia) | United States | Virginia | 2005 |
Corn (maize), and Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5559 |
52
| United States (Indiana) | United States | Indiana | 2005 |
Soybean
|
chlorimuron-ethyl, and cloransulam-methyl
| 45 |
Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B)
| 61 | Conyza canadensis | Horseweed | 7836 |
53
| United States (Nebraska) | United States | Nebraska | 2006 |
Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5496 |
54
| United States (Michigan) | United States | Michigan | 2007 |
Nurseries
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5312 |
55
| United States (Mississippi) | United States | Mississippi | 2007 |
Soybean
|
glyphosate, and paraquat
| 45 |
Multiple Resistance: 2 Sites of Action PS I Electron Diversion
( HRAC Group 22 (Legacy D) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5384 |
56
| United States (West Virginia) | United States | West Virginia | 2007 |
Corn (maize), and Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 7774 |
57
| United States (Oklahoma) | United States | Oklahoma | 2009 |
Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5528 |
58
| United States (South Dakota) | United States | South Dakota | 2010 |
Corn (maize), and Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5634 |
59
| United States (Delaware) | United States | Delaware | 2010 |
Soybean, and Wheat
|
glyphosate, thifensulfuron-methyl, and tribenuron-methyl
| 45 |
Multiple Resistance: 2 Sites of Action Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5710 |
60
| United States (Iowa) | United States | Iowa | 2011 |
Corn (maize), and Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 5567 |
61
| United States (Kansas) | United States | Kansas | 2011 |
Corn (maize), Cotton, Soybean, and Wheat
|
chlorsulfuron, iodosulfuron-methyl-Na, metsulfuron-methyl, rimsulfuron, thiencarbazone-methyl, thifensulfuron-methyl, and tribenuron-methyl
| 45 |
Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B)
| 61 | Conyza canadensis | Horseweed | 7806 |
62
| United States (Alabama) | United States | Alabama | 2013 |
Corn (maize), Cotton, and Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 7783 |
63
| United States (Wisconsin) | United States | Wisconsin | 2013 |
Soybean
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 7823 |
64
| United States (Illinois) | United States | Illinois | 2013 |
Soybean
|
cloransulam-methyl
| 45 |
Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B)
| 61 | Conyza canadensis | Horseweed | 7865 |
65
| United States (California) | United States | California | 2014 |
Almonds
|
glyphosate, and paraquat
| 45 |
Multiple Resistance: 2 Sites of Action PS I Electron Diversion
( HRAC Group 22 (Legacy D) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 9943 |
66
| United States (Montana) | United States | Montana | 2015 |
Roadsides
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 11011 |
67
| United States (Oklahoma) | United States | Oklahoma | 2018 |
Cotton, Soybean, and Wheat
|
chlorsulfuron, and metsulfuron-methyl
| 45 |
Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B)
| 61 | Conyza canadensis | Horseweed | 17149 |
68
| United States (Oregon) | United States | Oregon | 2023 |
Fallow, and Wheat
|
glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 61 | Conyza canadensis | Horseweed | 27286 |