MOA's Flashcards
Group 1
ACCase Inhibitors (Fops and Dims)
Mostly used for grass control
Inhibits the ACCase enzyme in the plant
Group 2
ALS Inhibitors
Branch Chain Amino Acid (BCAA) Inhibitor
Cross resistance is common within this group
Group 3
Root Growth Inhibitor
Applied pre-plant or pre-emergence to control grasses and small-seeded broadleaf weeds.
Inhibit cell division which stops roots from extending
Are yellow in color
Group 4
Growth Regulators
Also known as synthetic auxins
Generally selective for broadleaf weed control in grass crops.
Ex. 2,4-D, Dicamba, MCPA, MCPB
Groups 5,6,7
Photosynthesis Inhibitors -Photosystem II
Used to control grass and broadleaf weeds.
Inhibit Photosystem II which is a part of the photosynthesis pathway
Groups 8 and 15
Shoot Growth Inhibitors
Generally control grass weeds and small-seeded broadleaf weeds.
Soil-applied herbicides and control weeds that have not emerged from the soil surface.
Group 9
Aromatic Amino Acid Inhibitors Only herbicide in this class is Glyphosate. Non-selective herbicide (kills grass and broadleaves)
Group 10
Glutamine Synthesis Inhibitors Only herbicide in this class is glufosinate. Non-selective burndown treatment
Groups 13 and 27
Pigment Synthesis Inhibitors
Prevent chlorphyll production thus giving plants a “bleached” appearance.
Also referred to as HPPD-inhibitors
Group 14
Cell Membrane Inhibitor Destroy cell membranes. Activity is delayed in the absence of light. Also referred to as PPO-inhibitors. Known as “burner”-type herbicides.
Group 22
Photosynthesis Inhibitors—Photosystem I
Cell membrane disruptors.
Non-selective weed control and crop desiccation prior to harvest.
Dimension : Active and MOA and Group
Dithiopyr - Pre-Emergent with some post-emergent activity on crabgrass at 5 leaf stage - Group 3
Specticle : Active and MOA and Group
Indaziflam - Pre-Emergent - Group 29
Gallery : Active and MOA and Group
Isoxaben - Pre-Emergent for broadleaf weeds - Group 21
Tenacity : Active and MOA and Group
Mesotrione - Pre and Post emergent activity. Can apply at seeding. Group 27
Surflan : Active and MOA and Group
Oryzalin - Pre-emergent - Group 3
Pendulum - Active and MOA and Group
Pendimethalin - Pre-emergent - Group 3
Barricade - Active and MOA and Group
Prodiamine - Pre-emergent - Group ?
Dismiss - Active and MOA and Group
Sulfentrazone - Pre and Post-Emergent - Group 14
Quicksilver T&O - Active and MOA and Group
Carfentrazone - Post-Emergent - Group 14
Lontrel - Active and MOA and Group
Clopyralid - Post-Emergent - Group 4 (works on hard to kill thistle and clover)
Banvel - Active and MOA and Group
Dicamba - Post-emergent - Group 4
Fluroxypyr - When, MOA, Group, Other
Post-Emergent, Translocated through Plant, Group 4, avoid shallow tree or shrub roots.
MCPA - When, MOA, Group, Other
Post-emergent Broadleaf, Translocated through plant, Group 4
Drive - Active and MOA and Group
Quinclorac - Post-emergent - Group 26
Turflon Ester - Active and MOA and Group
Triclopyr - Post-emergent - Group 4
Trimec - Active and MOA and Group
2,4-D, MCPP, Dicamba - Post emergent - Groups 4,4,4
Dithiopyr - When, MOA, Group, Common Name
Pre-emergent, ??, Group 3, Dimension
Indaziflam - When, MOA, Group, Common Name
Pre-emergent, ?? , Group 29, Specticle
Isoxaben - When, MOA, Group, Common Name
Pre-emergent, ??, Group 21, Gallery
Mesotrione - When, MOA, Group, Common Name
Pre and Post emergent, ?? , Group 27, Tenacity
Oryzalin - When, MOA, Group, Common Name
Pre-emergent, ?? , Group 3, Surflan
Pendamethalin - When, MOA, Group, Common Name
Pre-emergent, ?? , Group 3, Surflan
Prodiamine - When, MOA, Group, Common Name
Pre-emergent, ??, Group ? , Barricade
Sulfentrazone - When, MOA, Group, Common Name
Pre and Post emergent, ??, Group 14, Dismiss
Carfentrazone - When, MOA, Group, Common Name
Post-Emergent , ?? , Group 14, Quicksilver
Clopyralid - When, MOA, Group, Common Name
Post-emergent, ??, Group 4, Lontrel
Dicamba - When, MOA, Group, Common Name
Post-emergent, ??, Group 4, Banvel
