Fenitrothion
Fenitrothion: Professional Insecticide for Agricultural and Household Use
Fenitrothion is a highly effective organophosphate insecticide widely used in agriculture, public health, and household pest control. This professional-grade solution offers broad-spectrum control against various insect pests while maintaining environmental safety when used as directed.
Product Specifications
- Chemical Name: O,O-Dimethyl O-4-nitro-m-tolyl phosphorothioate
- Molecular Formula: C9H12NO5PS
- CAS Number: 122-14-5
- Appearance: Pale yellow to brown liquid
- Odor: Slight characteristic odor
- Solubility: Slightly soluble in water (30 mg/L at 20°C)
| Formulation Type | Concentration | Application Method | Target Pests |
|---|---|---|---|
| Emulsifiable Concentrate (EC) | 40-50% | Foliar spray, ULV | Locusts, stored grain pests |
| Wettable Powder (WP) | 20-25% | Spray, dusting | Cockroaches, ants, flies |
| Ultra Low Volume (ULV) | 90-95% | Aerial application | Mosquitoes, agricultural pests |
Fenitrothion Application Guidelines
For optimal results with Fenitrothion, follow these application guidelines:
- Always wear appropriate PPE (gloves, mask, protective clothing)
- Apply during calm weather conditions to prevent drift
- Use recommended dosage based on target pest and crop
- Avoid application near water bodies
- Observe pre-harvest intervals for agricultural use
Fenitrothion FAQ
Q: What is the mechanism of action of Fenitrothion?
A: Fenitrothion acts as an acetylcholinesterase inhibitor, disrupting the nervous system of insects. It binds irreversibly to the enzyme, causing continuous nerve impulse transmission that leads to paralysis and death of the pest.
Q: What is the residual activity period of Fenitrothion?
A: The residual activity of Fenitrothion typically lasts 7-14 days outdoors, depending on environmental conditions. In indoor applications or protected environments, it may remain effective for 4-6 weeks. Degradation is faster in alkaline conditions and when exposed to sunlight.
Q: Is Fenitrothion safe for use around children and pets?
A: When applied according to label instructions and allowed to dry completely, Fenitrothion poses minimal risk. However, it's recommended to keep children and pets away from treated areas until surfaces are dry (usually 2-4 hours). Always store Fenitrothion products in their original containers, out of reach.
Storage and Handling
| Storage Temperature | 0°C to 35°C (32°F to 95°F) |
| Shelf Life | 2 years in original sealed container |
| Incompatible Materials | Strong alkalis, oxidizing agents |
| First Aid Measures | Eye flush with water for 15 minutes, skin wash with soap and water, seek medical attention if ingested |
Environmental Considerations
Fenitrothion has moderate persistence in the environment with these characteristics:
- Soil half-life: 2-4 weeks
- Water half-life: 1-3 days
- Low bioaccumulation potential
- Toxic to bees and aquatic organisms - avoid direct application
Fenitrothion in Integrated Pest Management
Fenitrothion can be effectively incorporated into IPM programs when used judiciously:
- Combine with pheromone traps for monitoring
- Use spot treatments rather than blanket applications
- Alternate with insecticides from different chemical classes to prevent resistance
- Time applications to coincide with vulnerable pest life stages
Regulatory Status
Fenitrothion is registered for use in many countries with these common restrictions:
| Region | Status | Key Restrictions |
|---|---|---|
| USA | Restricted Use | Certified applicators only, no residential use |
| EU | Not Approved | Banned since 2006 |
| Asia | Approved | Most agricultural uses permitted |
Fenitrothion Resistance Management
To prevent pest resistance to Fenitrothion:
- Rotate with non-organophosphate insecticides
- Use recommended doses - avoid under-dosing
- Combine with physical control methods
- Monitor pest populations for efficacy changes
Additional Fenitrothion FAQ
Q: Can Fenitrothion be mixed with other pesticides?
A: Fenitrothion can be tank-mixed with many pesticides, but always conduct a jar test first. Avoid mixing with alkaline products (pH >8) as this accelerates degradation. Some effective combinations include Fenitrothion with pyrethroids for enhanced knockdown.
Q: What is the difference between Fenitrothion and Fenthion?
A: While both are organophosphates, Fenitrothion has better residual activity and lower mammalian toxicity. Fenthion is more persistent in the environment and has stronger systemic action. Fenitrothion is generally preferred for agricultural applications.
Q: How should I dispose of unused Fenitrothion?
A: Never pour Fenitrothion down drains or into water systems. Small quantities can be applied to registered sites at label rates. For larger amounts, contact hazardous waste disposal services. Triple-rinse containers before disposal.