The library · Insecticide
Permethrin
An older pyrethroid with fast contact knockdown on chewing insects.
- Group
- Insecticide Group 3A
- Family
- Pyrethroids
- Formula
- C21H20Cl2O3
- Molar mass
- 391.3 g/mol
- You may know it as
- Ambush
- In Canada
- Some generics
Structure: PubChem CID 40326
How it kills
Sodium channel modulators
Holds nerve sodium channels open, so nerves keep firing.
Fast knockdown of insects it contacts or that eat treated leaves.
Works by contact with the insect, or when it feeds on treated leaves.
Where it fits
In the season.
Commonly used on
- Caterpillars
- Grasshoppers
Good to know
- Spray to economic thresholds to protect beneficial insects.
- Check pre-harvest intervals.
- Broad spectrum, so it also hits beneficial insects. Cool temperatures often improve pyrethroid activity, heat can reduce it.
