Monocrotophos
Description
Monocrotophos is a highly potent organophosphate insecticide and acaricide known for its broad-spectrum efficacy. It acts as both a contact and systemic poison, making it effective against a variety of pests that feed on plant tissues.
The primary mode of action is the inhibition of the enzyme acetylcholinesterase within the insect's nervous system. This disruption prevents the breakdown of the neurotransmitter acetylcholine, leading to continuous neural stimulation, paralysis, and ultimately the death of the target pest.
It has historically been used on a wide range of agricultural crops, including cotton, rice, sugarcane, and tobacco, to manage aphids, thrips, bollworms, whiteflies, and spider mites. Its systemic nature allows the chemical to be absorbed by roots or leaves and translocated throughout the plant.
Due to its extreme toxicity to humans, birds, and beneficial insects like bees, monocrotophos is severely restricted or banned in many jurisdictions under international chemical conventions. Agronomists must prioritize safer alternatives and strictly adhere to all regional environmental and occupational safety regulations.
- Systemic and contact insecticidal activity.
- Rapid knockdown effect on chewing and sucking insects.
- High toxicity requiring specialized handling equipment.
- Severe risk to non-target biodiversity and pollinators.
- Strict international restrictions and regulatory oversight.
Rigorous safety measures are mandatory when handling any products containing this active ingredient. This includes the use of full protective gear, proper chemical disposal methods, and adhering to strict pre-harvest intervals to prevent toxic residues from entering the food chain or water supplies.
Status in the European Union
Not approved in the EU
- CAS number
- 6923-22-4
- Category (EU)
- AC - Acaricide
- ADI
- 0.0006 mg/kg bw/day
- ARfD
- 0.002 mg/kg bw
Regulatory status data: EU Pesticides Database © European Union, CC BY 4.0. EU status is for reference only and does not replace national registration in your country.