weed out resistance - take action

HERBICIDE GROUPS and Sites of Action

SITE OF ACTION GROUP

SITE OF ACTION

ACCASE INHIBITORS

ALS INHIBITORS

MICROTUBULE INHIBITORS

SYNTHETIC AUXINS

PHOTOSYSTEM IIINHIBITORS

LIPID SYNTHESIS INHIBITOR (not ACCase)

EPSP SYNTHASE INHIBITOR

GLUTAMINE SYNTHETASE

INHIBITOR

DITERPENE BIOSYNTHESIS

INHIBITOR

PPO INHIBITORS

LONG-CHAIN FATTY ACID INHIBITORS

PHOTOSYSTEM I ELECTRON DIVERTER

HPPD INHIBITORS

PRODUCT EXAMPLES(Trade Name®)

Assure II, Select Max

Classic, Pursuit

Prowl H2O, Treflan

2,4-D, Clarity,quinclorac

atrazine, metribuzin, Basagran, Linex Far-Go Roundup,

(glyphosate) Liberty Command Flexstar, Cobra Dual, Harness Gramoxone,

(paraquat)Callisto, Laudis

1 2 3 4 65 7 98 10 14 15 22 27

COMMON WATERHEMP Amaranthus rudis

SHOWN RESISTANCE TO:

COMMON RAGWEED Ambrosia artemisiifolia

SHOWN RESISTANCE TO:

BARNYARD GRASS Echinochloa crus-galli

SHOWN RESISTANCE TO:

PALMER AMARANTH Amaranthus palmeri

SHOWN RESISTANCE TO:

COMMON LAMBSQUARTERS Chenopodium album

SHOWN RESISTANCE TO:

JOHNSONGRASS Sorghum halepense

SHOWN RESISTANCE TO:

HORSEWEED (Marestail) Conyza canadensis

SHOWN RESISTANCE TO:

KOCHIA Kochia scoparia

SHOWN RESISTANCE TO:

GIANT FOXTAIL Setaria faberi

SHOWN RESISTANCE TO:

GIANT RAGWEED Ambrosia trifi da

SHOWN RESISTANCE TO:

ITALIAN RYEGRASS Lolium multifl orum

SHOWN RESISTANCE TO:

2

2

2

2

4

2

3

2

2

2

5

5

4

5

5

5

4

5

29

9 14

5

9

9

7

5

914

7

9 22

9

27

8

273

2

3

1 9 10 152

1 13 15 1 1

13

Technical editing for this publication was led by Bob Hartzler, Iowa State University in partnership with other universities in the soybean-growing areas of the United States. For more information and links to additional resources, visit www.IWillTakeAction.com. Take Action is supported by BASF, Bayer, DuPont, Dow, FMC, Monsanto, Syngenta, Valent and corn, cotton, sorghum, soy and wheat organizations. The United Soybean Board and all Take Action partners, including the companies mentioned above, neither recommend nor discourage the implementation of any advice contained herein, and are not liable for the use or misuse of the information provided. ©2017 United Soybean Board

Brought to you by the soy checkoff.

RESISTANCEWEED OUT

Know Your WeedsThe 11 Biggest Resistance Threats

For more information and links to additional resources, visit www.IWillTakeAction.com

Herbicide Groups provide a simple way of determin-

ing a herbicide’s site of action. The site of action is

the specifi c protein a herbicide binds to, resulting

in disruption of a physiological process (mode of

action) and plant death. Weed-management

programs that include multiple Herbicide Groups

eff ective against problem weeds are the fi rst step

in managing herbicide resistance. Herbicide Group

numbers are displayed on most herbicide labels.

This poster provides information on the Herbicide

Groups most commonly used in soybean produc-

tion. Also, the most problematic herbicide-resistant

weeds and the Herbicide Groups they have evolved

resistance to are displayed.