1
| 414 | Kochia | 1984 | Kochia scoparia Kochia | United States (Montana) | Montana | MT | Photosystem II inhibitors (C1/5) |
Photosystem II inhibitors (C1/5)
| atrazine | Alvin Bussan |
2
| 411 | Russian-thistle | 1987 | Salsola tragus Russian-thistle | United States (Montana) | Montana | MT | ALS inhibitors (B/2) |
ALS inhibitors (B/2)
| chlorsulfuron | Alvin Bussan |
3
| 420 | Kochia | 1989 | Kochia scoparia Kochia | United States (Montana) | Montana | MT | ALS inhibitors (B/2) |
ALS inhibitors (B/2)
| chlorsulfuron, metsulfuron-methyl | Alvin Bussan |
4
| 412 | Wild Oat | 1990 | Avena fatua Wild Oat | United States (Montana) | Montana | MT | Cell elongation inhibitors (Z/8), Lipid Inhibitors (N/8) |
Multiple Resistance: 2 Sites of Action Cell elongation inhibitors (Z/8) Lipid Inhibitors (N/8)
| difenzoquat, triallate | Alvin Bussan |
5
| 557 | Persian Darnel | 1993 | Lolium persicum Persian Darnel | United States (Montana) | Montana | MT | ACCase inhibitors (A/1) |
ACCase inhibitors (A/1)
| diclofop-methyl | Alvin Bussan |
6
| 532 | Kochia | 1994 | Kochia scoparia Kochia | United States (Montana) | Montana | | Synthetic Auxins (O/4) |
Synthetic Auxins (O/4)
| dicamba, fluroxypyr | Bill Dyer, Alvin Bussan |
7
| 558 | Wild Oat | 1996 | Avena fatua Wild Oat | United States (Montana) | Montana | MT | ALS inhibitors (B/2) |
ALS inhibitors (B/2)
| imazamethabenz-methyl | Bill Dyer |
8
| 5246 | Wild Oat | 2002 | Avena fatua Wild Oat | United States (Montana) | Montana | | ACCase inhibitors (A/1) |
ACCase inhibitors (A/1)
| clodinafop-propargyl, diclofop-methyl, fenoxaprop-P-ethyl, tralkoxydim | Alvin Bussan, Jeffery Brennan |
9
| 7804 | Green Foxtail | 2005 | Setaria viridis Green Foxtail | United States (Montana) | Montana | | ACCase inhibitors (A/1) |
ACCase inhibitors (A/1)
| diclofop-methyl, fenoxaprop-P-ethyl, fluazifop-P-butyl, pinoxaden, sethoxydim | Bill Dyer |
10
| 5711 | Kochia | 2012 | Kochia scoparia Kochia | United States (Montana) | Montana | | EPSP synthase inhibitors (G/9) |
EPSP synthase inhibitors (G/9)
| glyphosate | Prashant Jha |
11
| 7810 | Kochia | 2013 | Kochia scoparia Kochia | United States (Montana) | Montana | | ALS inhibitors (B/2), EPSP synthase inhibitors (G/9) |
Multiple Resistance: 2 Sites of Action ALS inhibitors (B/2) EPSP synthase inhibitors (G/9)
| glyphosate, metsulfuron-methyl, thifensulfuron-methyl, tribenuron-methyl | Prashant Jha |
12
| 11011 | Horseweed | 2015 | Conyza canadensis Horseweed | United States (Montana) | Montana | | EPSP synthase inhibitors (G/9) |
EPSP synthase inhibitors (G/9)
| glyphosate | Tim Fine, Fabian Menalled |
13
| 12032 | Russian-thistle | 2015 | Salsola tragus Russian-thistle | United States (Montana) | Montana | | EPSP synthase inhibitors (G/9) |
EPSP synthase inhibitors (G/9)
| glyphosate | Prashant Jha, Vipan Kumar |
14
| 15071 | Downy Brome (Cheatgrass) | 2016 | Bromus tectorum Downy Brome (Cheatgrass) | United States (Montana) | Montana | | ALS inhibitors (B/2) |
ALS inhibitors (B/2)
| imazamox, procarbazone-sodium, pyroxsulam | Prashant Jha, Vipan Kumar |