HERBICIDE BRAND NAMES, ACTIVE INGREDIENTS, CHEMICAL FAMILIES

Herbicide Mode of Action Groups Group 4: Synthetic auxins Overwhelm natural auxin pathways Trade names: 2,4-D, MCPA, Banvel, Clarity, Milestone,

PICLORAM - Invasive

Mode of Action: Picloram is an “auxin mimic” or synthetic auxin This type of herbicide kills susceptible plants by mimicking the plant growth hormone auxin (indole acetic acid), and when administered at effective doses, causes uncontrolled and disorganized plant growth that leads to plant death

Summary of Herbicide Mechanism of Action According to the

Summary of Herbicide Mechanism of Action According to WSSA Several herbicides have been identified as having an unknown mode of action including organic arsenicals (Group 17), arylaminopropionic acids (Group 25), and other non-classified herbicides (Group 26) Potential Nucleic Acid Inhibitors or 17 Non-descript mode of action

HERBICIDE MODE OF ACTION TABLE - OSU Extension

HERBICIDE MODE OF ACTION TABLE WSSA GROUP MODE OF ACTION CHEMICAL FAMILY (GROUP) ACTIVE INGREDIENTS 1 Inhibition of acetyl CoA carboxylase (ACCase) Aryloxyphenoxy-propionate ‘FOPs’ clodinafop-propargyl cyhalofop-butyl diclofop-methyl fenoxaprop-P-ethyl fluazifop-P-butyl haloxyfop-R-methyl propaquizafop quizalofop-P-ethyl 1 Cyclohexanedione

2,4-D

Mode of Action: 2,4-D is an “auxin mimic” or synthetic auxin This type of herbicide kills the target weed by mimicking the plant growth hormone auxin (indole acetic acid), and when administered at effective doses, causes uncontrolled and disorganized plant growth that leads to plant death

Common Herbicides Use & Mode of Action

MODE OF ACTION Symptoms that occur after herbicide application leading to plant after herbicide application leading to plant death • ALS Inhibitors • Photosystem 1 Inhibitors • PPO Inhibitors • Carotenoid Biosynthesis Inhibitors • EPSP Inhibitors • Auxin Mimics • Unclassified **Rotate to prevent resistant populations**

Weed Resistance to Synthetic Auxin Herbicides

The ﬁrst herbicide with this mode of action, 2,4-D, has been broadly and intensively used for more than 70years 2 Synthetic auxin herbicides (SAHs) are most commonly used to