The library · Herbicide
2,4-D
One of the oldest and most widely used broadleaf herbicides. Sold as amine and ester forms.
- Group
- Herbicide Group 4
- Family
- Phenoxys, benzoics, pyridines and quinolines
- Formula
- C8H6Cl2O3
- Molar mass
- 221.03 g/mol
Structure: PubChem CID 1486
How it kills
Synthetic auxins
Mimics a natural plant hormone, overloading the growth system.
Broadleaf weeds twist, curl and grow themselves to death.
Taken in by the leaf, then carried with sugars down to the roots and up to the growing points.
Where it fits
In the season.
Commonly used on
- Broadleaf weeds
- Perennials
- Cereals
Good to know
- Ester forms and amine forms behave differently on volatility and cool-weather activity.
- Crop stage matters in cereals. Check the label.
- Mind drift and sprayer clean-out around pulses and canola.
- Group 4 resistant kochia has been confirmed on the Prairies. Keep drift and sprayer clean-out in mind around sensitive crops.
On Dean's list
Products with 2,4-D.
| Product | Similar to | Strength |
|---|---|---|
| 2,4-D Amine | 2, 4-D AMINE 600 | 2,4 D 564 g/l (DMA salt 600 g/l) SL |
| 2,4-D Ester | 2,4-D Ester 700 | 2,4-D Ethylhexyl ester 660 g a.e./L EC |
| Bromoxynil / 2,4-D | Thumper | 2,4-D Ethylhexyl ester 280 g/l + Bromoxynil 280 g/l EC |
| Carfentrazone / 2,4D Ester | Blackhawk | Carfentrazone-ethyl 240 g/L emulsifiable concentrate (EC) • 2,4-D ester 660 g/L emulsifiable concentrate (EC) |
| Fluroxypyr / 2,4-D | OcTTain XL® | Fluroxypyr & 2,4-D |
| Fluroxypyr / Thifensulfuron / Tribenuron / MCPA Ester | Retain | Fluroxypyr 180 g/L emulsifiable concentrate (EC) • Thifensulfuron methyl 50% + Tribenuron methyl 25% wettable granule (WG) • 2,4-D Ester 660 g/L emulsifiable concentrate (EC) |
Sold alongside: Bromoxynil, Carfentrazone, Fluroxypyr, MCPA, Tribenuron, Thifensulfuron
Same group, same mode of action
