Monocil (Monocrotophos 36% SL): Product Guide & Regulatory Status
⚠️ IMPORTANT ALERT: As of October 2024, the sale, manufacture, and use of Monocrotophos 36% SL are legally prohibited in India.
Monocil (manufactured by Insecticides India Ltd) was a popular broad-spectrum organophosphate insecticide. It was widely used for decades to control biting, chewing, and sucking pests in Cotton, Rice, and Sugarcane.
Note: This page serves as a technical archive and safety guide. Please switch to safer, government-approved alternatives like Imidacloprid or Acetamiprid immediately to avoid legal penalties and health risks.
Why Was This Product Popular? Key Benefits (Historical)
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Rapid Knockdown Action: It paralyzed pests almost immediately upon contact, providing instant relief from infestations.
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Dual Action Power: It worked in two ways: Systemic (absorbed by the plant) and Contact (kills on touch).
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Long Residual Control: Once absorbed, it stayed active inside the plant system, protecting new growth from sucking pests.
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Rainfast Absorption: The Soluble Liquid (SL) formulation mixed easily with water and absorbed quickly into leaves.
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Broad Spectrum Coverage: It effectively controlled diverse pests, from Aphids and Jassids to Bollworms and Stem Borers.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Monocil (and others like Phoskill) |
| Technical Name | Monocrotophos 36% SL |
| IRAC MoA Code | Group 1B (Organophosphates) |
| Chemical Group | Organophosphate Insecticide |
| Formulation | Soluble Liquid (SL) |
| Toxicity Label | 🔴 Red Label (Extremely Toxic) |
How It Works: Mode of Action
Monocrotophos works by attacking the nervous system of the insect.
[Image of Acetylcholinesterase inhibition mechanism]- Systemic Entry: The chemical enters the pest through direct contact or by feeding on treated sap.
- Enzyme Blockage: It irreversibly binds to Acetylcholinesterase (AChE), an enzyme needed to stop nerve signals.
- Paralysis & Death: Without this enzyme, nerve signals fire uncontrollably, leading to tremors, paralysis, and rapid death.
Warning: This same mechanism affects humans and birds, making it highly dangerous.
Target Crops & Pests (Historical Use)
| Crop | Target Pest(s) |
|---|---|
| Cotton | Aphids, Jassids, Thrips, Whitefly, Bollworm |
| Paddy (Rice) | Brown Plant Hopper (BPH), Yellow Stem Borer, Leaf Roller |
| Sugarcane | Mealybug, Scale Insects, Pyrilla |
Dosage & Application Guide
The Golden Rule: Always follow the "Dose per Acre" for accurate results.
Dosage per Acre, Litre, & Pre-Harvest Interval (PHI)
| Crop | Dose (ml / Acre) | Water (L / Acre) | Dose (ml / Litre) | PHI (Days) |
|---|---|---|---|---|
| Cotton | 200 - 450 ml | 200 L | 1.5 - 2.2 ml | 21-30 |
| Paddy (Rice) | 400 - 500 ml | 200 L | 2.0 - 2.5 ml | 30 |
| Sugarcane | 400 - 600 ml | 200 L | 2.0 - 3.0 ml | 30+ |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting.
How to Apply: Best Practices
- Timing: Spray during the early stages of pest infestation. Avoid spraying during the flowering stage to protect bees.
- Mixing: Do not mix with alkaline substances like Bordeaux mixture, as it destroys the chemical effectiveness.
- Coverage: Use high water volume (200L/acre) to ensure the chemical reaches the stem and underside of leaves.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use. ⚠️ Antidote: Atropine Sulphate (administer only under medical supervision).
Frequently Asked Questions
1. Is Monocil (Monocrotophos) currently legal in India?
No. As of October 2024, the manufacture, sale, and use of Monocrotophos 36% SL are banned. Using it is now a punishable offense.
2. Can I use Monocil on vegetable crops?
Absolutely Not. Usage on vegetables (Brinjal, Okra, etc.) was banned in 2005 due to high toxic residue risks.
3. What are the best alternatives to Monocrotophos?
Government-approved alternatives include Imidacloprid, Acetamiprid, and Spinetoram. These are safer and legal.
4. What should I do if I inhale or touch the chemical?
Remove contaminated clothes and wash skin immediately. If inhaled, seek medical help instantly. The specific antidote is Atropine Sulphate.
5. Why is the packaging Red labeled?
The Red Label signifies "Extreme Toxicity." It means even a small amount (like a teaspoon) can be fatal to humans.
Safety & Disclaimer
Always read and follow the instructions on the official product label. The information provided here is for guidance and archival purposes only. Monocrotophos is banned in India; possession or sale is illegal. Use personal protective equipment (PPE) during application of any pesticide.
