The library · Herbicide
S-metolachlor
A chloroacetamide Group 15, applied to the soil for grassy weeds and some small-seeded broadleaf weeds.
- Group
- Herbicide Group 15
- Family
- Thiocarbamates, chloroacetamides and isoxazolines
- Formula
- C15H22ClNO2
- Molar mass
- 283.79 g/mol
- You may know it as
- Stallion, Primextra II Magnum
- In Canada
- Some generics
Structure: PubChem CID 11140605
How it kills
VLCFA inhibitors
Stops the very long fatty acids a germinating shoot needs.
Weeds die in the soil as they try to emerge.
Held in the top layer of soil, where weeds pick it up as they germinate.
Where it fits
In the season.
Commonly used on
- Grassy weeds
- Broadleaf weeds
- Pulses
Good to know
- It needs moisture to work.
- Registered crops vary widely by product, so check the label for yours.
- It will not control weeds that are already up. Older labels may still call the thiocarbamates Group 8.
