Crystal Dursban Insecticide (Chlorpyrifos 20% EC)
The heavy-duty "Triple Action" solution for tough farming pests and long-lasting termite protection.
Dursban by Crystal Crop Protection is a trusted broad-spectrum insecticide that has served Indian farmers for decades. Formulated with Chlorpyrifos 20% EC, it is designed to fight stubborn chewing and biting pests in crops like Cotton and Paddy. Beyond agriculture, Dursban is a market leader in construction, creating a chemical barrier that protects buildings from termites for years.
Note: As per 2025 regulations, this product is strictly exempted for use on specific crops (like Cotton, Rice) and for Termite control. It is prohibited for use on Ber, Citrus, and Tobacco.
Why Choose This Product? Key Benefits
-
⏱️
Triple Action Power: Attacks pests in three ways: via direct contact, stomach ingestion (eating), and vapor action (fumigation) to find hidden insects.
-
🛡️
Superior Termite Control: Highly effective for Pre-construction and Post-construction treatment. It binds tightly to soil particles, creating a non-leaching barrier that kills termites on contact.
-
⏳
Deep Penetration: The fumigation effect allows the chemical to penetrate hidden crevices, rice stems, and soil tunnels where sprays usually cannot reach.
-
🌧️
Broad Spectrum: One solution controls a wide variety of pests, including Bollworms, Stem Borers, Leaf Folders, and Root Grubs.
-
🌿
Cost-Effective: Offers professional-grade pest control at an affordable price point compared to newer, more expensive chemistries.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Dursban |
| Technical Name | Chlorpyrifos 20% EC |
| IRAC MoA Code | Group 1B (Organophosphate) |
| Chemical Group | Organophosphorus |
| Formulation | Emulsifiable Concentrate (EC) |
| Toxicity Label | Yellow (Highly Toxic) - Use Caution |
How It Works: Mode of Action
Dursban works by targeting the nervous system of the insect. It is a powerful Acetylcholinesterase (AChE) inhibitor.
- Entry: The chemical enters the pest through contact (skin), stomach (eating treated leaves), or respiration (vapors).
- Blockage: It binds to the AChE enzyme, which is responsible for calming nerve signals.
- Result: This causes continuous nerve firing, leading to tremors, paralysis, and eventually the death of the pest.
This mechanism makes it effective against pests that hide inside stems or soil where regular sprays can't reach.
Target Crops & Pests
| Crop / Sector | Target Pest(s) |
|---|---|
| Cotton | Bollworm Complex (American, Spotted, Pink), Whitefly |
| Paddy (Rice) | Stem Borer, Leaf Folder (Hispa) |
| Construction (Buildings) | Termites (Pre & Post Construction treatment) |
| Sugarcane | Early Shoot Borer, Termites, Root Grubs |
Dosage & Application Guide
The Golden Rule: Always follow the "Dose per Acre" for accurate results.
Dosage per Acre, Litre, & Pre-Harvest Interval (PHI)
| Crop / Use | Dose (ml / Acre) | Water (L / Acre) | Dose (ml / Litre) | PHI (Days) |
|---|---|---|---|---|
| Cotton | 500 - 1200 ml | 200 - 400 L | 2.5 - 3 ml/L | Refer to Label |
| Paddy (Rice) | 500 - 750 ml | 200 - 300 L | 2.5 - 3 ml/L | Refer to Label |
| Termite Control | See Note | - | Combine 1 Part Dursban : 19 Parts Water | - |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting. Always check the physical product label for crop-specific PHI.
How to Apply: Best Practices
- Timing: Apply at the first sign of pest incidence. For Cotton Bollworm, consistent scouting is key.
- Mixing: Prepare a fresh solution for every spray. Do not allow the mixture to stand overnight as it may degrade.
- Coverage: Ensure thorough coverage of foliage. For Stem Borer in rice, the spray must reach the leaf sheath.
- Safety: Always wear PPE (gloves, mask, goggles). Chlorpyrifos is a neurotoxin; wash hands thoroughly immediately after use.
Frequently Asked Questions
1. Is Dursban effective for termites in new homes?
Yes. Dursban (Chlorpyrifos) is the industry standard for pre-construction anti-termite treatment. It binds to the soil and creates a chemical barrier that protects the foundation for years.
2. Can I use this on fruits like Citrus or Ber?
No. As of October 2023, the Indian government has banned the use of Chlorpyrifos on Ber, Citrus, and Tobacco due to residue concerns. Stick to exempted crops like Cotton and Paddy.
3. What is the antidote for accidental poisoning?
The specific antidote is Atropine Sulphate (and 2-PAM), which must be administered by a qualified medical professional immediately.
4. Why is Dursban better than simple contact sprays?
Dursban has a "fumigation" effect. Its high vapor pressure allows it to turn into gas and penetrate hidden areas—like inside a cotton boll or rice stem—where contact sprays cannot reach.
5. Can I mix Dursban with other chemicals?
Yes, it is often compatible with other insecticides like Cypermethrin (check Crystal's "Lara-909" for a pre-mix) to manage resistant pests, but always perform a small jar test first.
Safety & Disclaimer
Always read and follow the instructions on the official product label. The information provided here is for guidance only. Chlorpyrifos is a Schedule H substance and a neurotoxin. Use personal protective equipment (PPE) during application. Do not use on banned crops.
