The library · Insecticide
Dimethoate
An organophosphate with contact and systemic action, and one of the older tools for aphids and grasshoppers.
- Group
- Insecticide Group 1B
- Family
- Organophosphates
- Formula
- C5H12NO3PS2
- Molar mass
- 229.3 g/mol
- You may know it as
- Cygon, Lagon
- In Canada
- Several generics
Structure: PubChem CID 3082
How it kills
Acetylcholinesterase inhibitors
Blocks the enzyme that clears nerve signals, so nerves keep firing.
Fast knockdown of the insects it reaches.
Works by contact with the insect, or when it feeds on treated leaves.
Where it fits
In the season.
Commonly used on
- Aphids
- Grasshoppers
- Canola
Good to know
- It brings a different group from the pyrethroids.
- Avoid spraying flowering crops when bees are foraging.
- Organophosphates carry strict handling and re-entry rules, and they are hard on bees. Read the label first.
