1
| 243 | Kochia | 1985 | Kochia scoparia Kochia | United States (Iowa) | Iowa | IA | Photosystem II inhibitors (C1/5) |
Photosystem II inhibitors (C1/5)
| atrazine | Jack Dekker (Retired), Micheal Owen |
2
| 242 | Common Lambsquarters | 1989 | Chenopodium album Common Lambsquarters | United States (Iowa) | Iowa | IA | Photosystem II inhibitors (C1/5) |
Photosystem II inhibitors (C1/5)
| atrazine | Jack Dekker (Retired), Micheal Owen |
3
| 240 | Pennsylvania Smartweed | 1990 | Polygonum pensylvanicum Pennsylvania Smartweed | United States (Iowa) | Iowa | IA | Photosystem II inhibitors (C1/5) |
Photosystem II inhibitors (C1/5)
| atrazine | Jack Dekker (Retired), Micheal Owen |
4
| 241 | Giant Foxtail | 1992 | Setaria faberi Giant Foxtail | United States (Iowa) | Iowa | IA | Photosystem II inhibitors (C1/5) |
Photosystem II inhibitors (C1/5)
| atrazine | Jack Dekker (Retired), Micheal Owen |
5
| 239 | Tall Waterhemp | 1993 | Amaranthus tuberculatus (=A. rudis) Tall Waterhemp | United States (Iowa) | Iowa | IA | ALS inhibitors (B/2) |
ALS inhibitors (B/2)
| imazethapyr | Robert Hartzler |
6
| 1064 | Giant Foxtail | 1994 | Setaria faberi Giant Foxtail | United States (Iowa) | Iowa | IA | ACCase inhibitors (A/1) |
ACCase inhibitors (A/1)
| clethodim, fenoxaprop-P-ethyl, fluazifop-P-butyl, quizalofop-P-ethyl, sethoxydim | Robert Hartzler |
7
| 1062 | Common cocklebur | 1995 | Xanthium strumarium Common cocklebur | United States (Iowa) | Iowa | IA | ALS inhibitors (B/2) |
ALS inhibitors (B/2)
| chlorimuron-ethyl, imazethapyr | Robert Hartzler |
8
| 1061 | Tall Waterhemp | 1996 | Amaranthus tuberculatus (=A. rudis) Tall Waterhemp | United States (Iowa) | Iowa | IA | Photosystem II inhibitors (C1/5) |
Photosystem II inhibitors (C1/5)
| atrazine | Robert Hartzler |
9
| 5230 | Common Sunflower | 1997 | Helianthus annuus Common Sunflower | United States (Iowa) | Iowa | | ALS inhibitors (B/2) |
ALS inhibitors (B/2)
| chlorimuron-ethyl, imazethapyr | Robert Hartzler, Ian Zelaya |
10
| 5229 | Shattercane | 1998 | Sorghum bicolor Shattercane | United States (Iowa) | Iowa | | ALS inhibitors (B/2) |
ALS inhibitors (B/2)
| imazethapyr | Ian Zelaya |
11
| 5231 | Giant Ragweed | 2000 | Ambrosia trifida Giant Ragweed | United States (Iowa) | Iowa | | ALS inhibitors (B/2) |
ALS inhibitors (B/2)
| cloransulam-methyl, primisulfuron-methyl, prosulfuron | Robert Hartzler, Ian Zelaya |
12
| 5460 | Tall Waterhemp | 2009 | Amaranthus tuberculatus (=A. rudis) Tall Waterhemp | United States (Iowa) | Iowa | | PPO inhibitors (E/14) |
PPO inhibitors (E/14)
| lactofen | Micheal Owen |
13
| 5461 | Tall Waterhemp | 2009 | Amaranthus tuberculatus (=A. rudis) Tall Waterhemp | United States (Iowa) | Iowa | | EPSP synthase inhibitors (G/9) |
EPSP synthase inhibitors (G/9)
| glyphosate | Micheal Owen |
14
| 5463 | Giant Ragweed | 2009 | Ambrosia trifida Giant Ragweed | United States (Iowa) | Iowa | | EPSP synthase inhibitors (G/9) |
EPSP synthase inhibitors (G/9)
| glyphosate | Micheal Owen |
15
| 5490 | Tall Waterhemp | 2009 | Amaranthus tuberculatus (=A. rudis) Tall Waterhemp | United States (Iowa) | Iowa | | ALS inhibitors (B/2), HPPD inhibitors (F2/27), Photosystem II inhibitors (C1/5) |
Multiple Resistance: 3 Sites of Action ALS inhibitors (B/2) HPPD inhibitors (F2/27) Photosystem II inhibitors (C1/5)
| atrazine, mesotrione, rimsulfuron, tembotrione, thifensulfuron-methyl, topramezone | Jerry Green, Patrick Mcmullan |
16
| 5567 | Horseweed | 2011 | Conyza canadensis Horseweed | United States (Iowa) | Iowa | | EPSP synthase inhibitors (G/9) |
EPSP synthase inhibitors (G/9)
| glyphosate | Micheal Owen |
17
| 5576 | Tall Waterhemp | 2011 | Amaranthus tuberculatus (=A. rudis) Tall Waterhemp | United States (Iowa) | Iowa | | ALS inhibitors (B/2), EPSP synthase inhibitors (G/9), HPPD inhibitors (F2/27), Photosystem II inhibitors (C1/5) |
Multiple Resistance: 4 Sites of Action ALS inhibitors (B/2) EPSP synthase inhibitors (G/9) HPPD inhibitors (F2/27) Photosystem II inhibitors (C1/5)
| atrazine, chlorimuron-ethyl, glyphosate, imazamethabenz-methyl, isoxaflutole, mesotrione, thifensulfuron-methyl | Micheal Owen |