Chempa - Pyrazosulfuron-Ethyl 70% WDG - Dhanuka

Dhanuka Chempa Herbicide: Product Overview

Dhanuka Chempa is a selective systemic herbicide formulated with Pyrazosulfuron-Ethyl 70% WDG. It is intended for management of label-listed weeds in transplanted paddy. Chempa belongs to the sulfonylurea chemical family and inhibits acetolactate synthase (ALS), placing it in HRAC/WSSA Group 2, formerly described as legacy Group B.

The manufacturer lists Chempa as a pre-emergence paddy herbicide. Application timing can materially affect crop safety and weed control, so the current pack label must be checked before use. Do not transfer advice from another Pyrazosulfuron-Ethyl formulation or concentration to this 70% WDG product.

Available pack sizes on this page: 6 g and 12 g. Select the required pack above before adding the product to the cart.

Why Choose Chempa? Key Product Features

• Paddy-specific registered use: The official major-use listing covers transplanted rice against the listed weed spectrum.
• Selective systemic action: The active ingredient is absorbed by susceptible weeds and interferes with a key plant enzyme.
• Group 2 mode of action: Clear mechanism-group identification supports responsible herbicide planning and resistance management.
• Verified application figures: The manufacturer’s 12 g/acre in 200 L water/acre guidance aligns with the official 30 g/ha in 500 L water/ha listing after area conversion.
• Small-dose WDG packs: The catalog offers 6 g and 12 g packs; use calibrated measuring and spraying equipment.

Technical Specifications

How It Works: Mode of Action

1. Uptake: Susceptible weeds absorb the systemic active ingredient after correctly timed application.
2. ALS inhibition: Pyrazosulfuron-Ethyl inhibits acetolactate synthase, an enzyme required for synthesis of essential branched-chain amino acids in plants.
3. Growth interruption: Susceptible weed growth is disrupted. Visible response and final control depend on species, growth stage, application timing, water management and field conditions.

Repeated reliance on Group 2 herbicides can select resistant weed populations. Follow local resistance-management guidance and rotate with separately applied, label-approved options from different mode-of-action groups where agronomically appropriate.

Target Crop and Label-Listed Weeds

Use is not implied for direct-seeded rice, other crops or weeds absent from the current approved label. Local weed identification should be confirmed before treatment.

Dosage and Application Guide

The golden rule: Use the dose for the treated field area, not a guessed dose per tank or per litre. Calibrate the sprayer and total water volume for the actual area.

The acre and hectare figures above are equivalent after normal area conversion and rounding. No per-litre or per-pump dose is inferred. If the current physical label differs, follow that label and seek local expert guidance.

How to Apply: Best Practices

• Confirm the field: Use only in the crop and situation permitted by the current label.
• Check timing: Dhanuka describes Chempa as a pre-emergence paddy herbicide. Confirm the permitted crop and weed stage on the pack before spraying.
• Measure by area: Calculate the treated acreage or hectares, then measure product and water accordingly with calibrated equipment.
• Mixing: Add the measured product according to the label’s mixing sequence while maintaining adequate agitation. Do not tank-mix unless the label or qualified local guidance specifically permits it.
• Coverage and water management: Apply evenly and follow label directions for paddy-field water conditions before and after treatment.
• Drift control: Avoid spray movement to non-target crops, waterways and neighbouring areas.

Frequently Asked Questions

Safety, Storage and Disclaimer

Read the entire current product label before opening or use. Wear label-required personal protective equipment, avoid inhalation and skin or eye contact, and keep people and animals away from the treated area as directed. Do not eat, drink or smoke while handling the product. Prevent contamination of food, feed, seed and water. Store in the original sealed container in a locked, cool, dry and well-ventilated place away from children, animals, heat and direct sunlight. Dispose of empty containers and surplus spray liquid only as permitted by the label and local rules.

Disclaimer: This page summarizes verified manufacturer and Indian registration information for product selection; it does not replace the current physical label. Product registration, label directions and local agronomic conditions can change. The physical pack label and applicable law always take priority.