Dursban - Chlorpyrifos 20% EC - Crystal

Crystal Dursban Organophosphate Insecticide Overview

Crystal Dursban contains Chlorpyrifos 20% EC. It is an IRAC Group 1B organophosphate insecticide with contact, stomach and vapour activity for the specific crop–pest combinations authorised on the current Indian label.

Use note: Ber, citrus and tobacco uses must not be followed: chlorpyrifos uses on those crops were banned under India S.O. 4294(E), 3 October 2023. Use only currently authorised crops and the exact pack rate. PHI is not stated in the cited label and is not invented here.

Key Product Benefits

• Multiple exposure routes: Contact, stomach and vapour action against susceptible insects.
• Broad authorised crop range: Separate rates cover selected borers, hoppers, aphids, cutworms, root grubs, termites and related pests.
• Foliar, soil and seed-treatment directions: Method is crop- and pest-specific and cannot be interchanged.
• IRAC Group 1B: Acetylcholinesterase inhibition provides nerve-system activity.
• Store options: 100 ml, 250 ml, 500 ml, 1 L, 5 L and 20 L variants.

Technical Specifications

How Dursban Works

Chlorpyrifos inhibits acetylcholinesterase, causing acetylcholine to accumulate at nerve junctions. Susceptible insects develop loss of coordination, paralysis and death. It is not described here as systemic.

Currently Authorised Label Rates

Foliar uses generally use 500–1000 L water/ha; apple uses 1500–2000 L/ha. Gram/barley seed-treatment directions and any missing harvest interval must be confirmed on the current pack.

Application Guide

• Identify the crop, pest and authorised method before measuring; foliar, soil and seed-treatment rates are not interchangeable.
• For foliar use, add measured EC to the partly filled tank, top up and maintain a uniform emulsion.
• Use the crop-specific water volume and calibrated equipment; prevent drift and runoff.
• Do not exceed the current pack frequency and never use on ber, citrus or tobacco.

Safety and Stewardship

• Cholinesterase-inhibiting organophosphate: wear full label-specified protective equipment and avoid all skin, eye and inhalation exposure.
• Highly hazardous to fish/aquatic organisms and bees; protect waterways, aquaculture and active pollinator foraging.
• In suspected exposure, seek emergency medical care immediately and take the product label/container.
• Do not use on ber, citrus or tobacco; follow current central and state restrictions.

Frequently Asked Questions

Which uses are excluded?
Ber, citrus and tobacco uses are excluded because they are banned in India.

Can a foliar rate be used for termite soil treatment?
No. Each crop–pest pair and method has a separate label rate.

Is a PHI provided?
Not in the cited label, so the current Dursban pack must be checked before harvest.

Safety and Disclaimer

Restricted agricultural pesticide. The current registered Dursban label, applicable law and state directions control authorised crop, pest, rate, method, PHI, re-entry, protective equipment, first aid, storage and disposal.