Lara 909 Insecticide (Chlorpyriphos 50% + Cypermethrin 5% EC)
The "505" Powerhouse: A Dual-Action Solution for Cotton & Paddy Pests
Lara 909 by Crystal Crop Protection is a heavy-duty insecticide designed to tackle the toughest chewing and sucking pests in Indian agriculture. Known popularly as the "505" formulation, it combines the shock-effect of Cypermethrin with the long-lasting lethality of Chlorpyriphos.
Best For: Farmers facing complex pest attacks like the Bollworm complex in Cotton or Stem Borers in Paddy who need an economical, broad-spectrum solution.
Why Choose This Product? Key Benefits
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Instant Knockdown Power: Stops pests from feeding immediately upon contact, preventing further crop damage within minutes.
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Dual-Mode Protection: Kills pests that touch the leaf (Contact) and those that eat it (Stomach poison), offering complete coverage.
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Long-Lasting Residual Effect: Stays active on the plant for 10 to 14 days, reducing the need for frequent re-spraying.
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Vapor Action for Hidden Pests: The fumigant effect penetrates dense canopies to kill larvae hiding inside cotton bolls or curled leaves.
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Economical "505" Formula: A cost-effective solution (~₹400/acre) compared to newer, expensive molecules, making it budget-friendly.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Lara 909 |
| Technical Name | Chlorpyriphos 50% + Cypermethrin 5% EC |
| IRAC MoA Code | Group 1B (Organophosphate) + Group 3A (Pyrethroid) |
| Chemical Group | Organophosphates + Synthetic Pyrethroids |
| Formulation | EC (Emulsifiable Concentrate) |
| Toxicity Label | Yellow Triangle (Highly Toxic) |
How It Works: Mode of Action
Lara 909 uses a synergistic attack strategy to overwhelm the insect's nervous system. By combining two chemistries, it ensures that if one mechanism doesn't kill the pest, the other will. [Image of insect nervous system paralysis]
- The "Shock" Effect (Cypermethrin): Upon contact, Cypermethrin keeps the insect's sodium channels open. This causes immediate nervous excitement, tremors, and rapid paralysis (Knockdown).
- The "Choke" Effect (Chlorpyriphos): Once ingested or absorbed, Chlorpyriphos inhibits the enzyme acetylcholinesterase (AChE). This leads to a continuous firing of nerve signals, causing exhaustion and death.
- Fumigant Action: The formulation releases vapors that penetrate hard-to-reach areas, killing pests hiding inside bolls, leaf folds, or on the underside of leaves.
This multi-pronged attack helps manage resistance, as pests resistant to one chemical class may still be killed by the other.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Cotton | Bollworm Complex (American, Spotted, Pink), Aphids, Jassids, Thrips, Whiteflies |
| Paddy (Rice) | Yellow Stem Borer, Leaf Folder |
| Vegetables & Pulses | Pod Borers, Shoot Borers, Cutworms, Various sucking pests |
Dosage & Application Guide
The Golden Rule: Always follow the "Dose per Acre" for accurate results. Dilution rates may vary based on your spray pump type.
Dosage per Acre, Litre, & Pre-Harvest Interval (PHI)
| Crop | Dose (ml / Acre) | Water (L / Acre) | Dose (ml / Litre) | PHI (Days) |
|---|---|---|---|---|
| Cotton | 200 – 400 ml | 200 – 400 L | ~ 2.0 ml | 15 |
| Paddy (Rice) | 300 – 375 ml | 300 – 400 L | ~ 2.0 ml | 21 |
| General / Spot Application | Depends on Area | As Needed | 2.0 ml | 15+ |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting.
How to Apply: Best Practices
- Timing: Apply when pest population reaches the "Economic Threshold Level" (e.g., 5% damaged bolls). Avoid prophylactic (preventative) spraying.
- Mixing: Lara 909 is compatible with neutral fungicides like Mancozeb and Carbendazim. WARNING: Do not mix with alkaline products like Bordeaux Mixture or Lime Sulphur, as they will destroy the chemical.
- Coverage: Ensure thorough coverage of the foliage. The "contact" action requires the spray droplets to physically hit the pests or the surfaces they crawl on.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use. Avoid spraying when bees are active (spray in late evening).
Frequently Asked Questions
1. What is the price of Lara 909?
The price varies by pack size. A 1-liter bottle typically costs between ₹778 and ₹1,240, making it a very economical choice (approx. ₹400 per acre).
2. Is Lara 909 safe for honeybees?
No, it is highly toxic to bees. Do not spray during peak flowering times or when bees are actively foraging (morning/afternoon). Spray in the late evening.
3. Can I use this for Whiteflies in Cotton?
Yes, it is effective against whiteflies. However, avoid repeated use to prevent pest resurgence. It works best as a "correction" spray when populations are high.
4. What does "505" mean?
"505" is the industry nickname for the formulation ratio: 50% Chlorpyriphos and 5% Cypermethrin.
5. What happens if I mix it with Bordeaux Mixture?
The alkaline nature of Bordeaux Mixture will chemically break down the insecticide, rendering it ineffective. Avoid this combination.
Safety & Disclaimer
Always read and follow the instructions on the official product label. The information provided here is for guidance only. Use personal protective equipment (PPE) during application. Lara 909 is a Class II (Yellow Triangle) Toxic substance; handle with extreme care.
