Dhanuka Sempra Herbicide is a selective, systemic, post-emergence herbicide containing Halosulfuron Methyl 75% WG. It works by inhibiting the acetolactate synthase (ALS) enzyme in the weed's amino acid biosynthesis pathway, rapidly killing the weed. The Dhanuka Sempra herbicide is effective against nut grass, providing targeted protection. It also offers prolonged effects with strong systemic action, ensuring effective weed relief for the best results.
Key Features and Benefits of Dhanuka Sempra Herbicide:
Targeted Use: Dhanuka Sempra herbicide is especially effective against nut grass (Cyperus rotundus).
Strong Systemic Activity: Halosulfuron Methyl 75% WG offers quick-action systemic activity that provides rapid weed relief.
Prolonged Effects: After application, Dhanuka Sempra stays effective for a long time in the soil for prolonged protection.
Cost-Effective: A small dose of Halosulfuron Methyl 75% WG provides effective protection, reducing the need for frequent uses.
Safe for Crops: This herbicide is safe for sugarcane and maize crops while only attacking harmful weeds.
Dhanuka Sempra Herbicide Uses — Target Weeds and Crops:
This Halosulfuron Methyl 75% WG formula helps control the following weed species across registered crops:
Primary Target: Cyperus rotundus (Purple Nutsedge / Nut Grass / Motha) — both nutlet-generated and seed-propagated plants
Other Targets: Cyperus iria (Rice Flatsedge), certain broadleaf weeds associated with Sugarcane and Maize fields
Crop | Target Weeds |
Sugarcane | Cyperus rotundus, Cyperus iria, associated broadleaf weeds |
Maize | Cyperus rotundus, Cyperus iria, associated broadleaf weeds |
Bottle Gourd | Cyperus rotundus, broadleaf weeds |
Sempra Herbicide Dosage Per Litre — Recommended Dose:
Apply Halosulfuron Methyl 75% WG as a ground-level directed foliar spray on young, actively growing Cyperus rotundus plants; the earlier the application, the better the control. Always add a non-ionic surfactant or Dhanuka-approved sticker for best leaf absorption.
Crop | Dose Per Acre | Per 15L Pump | Water Volume Per Acre | Timing |
Sugarcane | 36 gm | 2.7 gm | 200 litres | 30–60 days after planting when weeds are actively growing |
Maize | 36 gm | 2.7 gm | 200 litres | 15–20 days after sowing when weeds are at 3–5 leaf stage |
Bottle Gourd | 36 gm | 2.7 gm | 200 litres | Post-emergence when weeds are actively growing |
How To Use Dhanuka Sempra Herbicide:
Measure 36 gm of Halosulfuron Methyl 75% WG per acre as per the dose table above.
Dissolve the granules in a small amount of clean water in a separate container and stir until fully dissolved before adding to the sprayer tank.
Fill the tank with the remaining clean water; use 200 litres of water per acre for good coverage.
Add a non-ionic surfactant or approved sticker at the recommended dose to improve leaf adhesion and absorption.
Direct the spray at ground level onto young, actively growing Cyperus rotundus plants; ensure thorough coverage of weed leaves and the soil surface around the weed.
Apply during the early morning or late evening; avoid spraying in extreme heat or when rain is expected within 6 hours of application.
Do not spray Halosulfuron Methyl 75% WG on stressed, drought-affected, or waterlogged weeds; active growth conditions give the best herbicidal response.
Rinse the sprayer thoroughly with clean water after use.
Best Time to Apply:
Apply Halosulfuron Methyl 75% WG when Cyperus rotundus plants are young and actively growing, 3–5 leaf stage, for the strongest kill response. For Sugarcane, apply 30–60 days after planting. For Maize, apply 15–20 days after sowing. Early application prevents weed competition during the most critical crop establishment window.
Frequency of Application and Re-Entry Period:
Frequency of Application: One well-timed application per season is generally sufficient for Cyperus rotundus control in Sugarcane and Maize. A second application may be needed if late-germinating weeds emerge from untreated nutlets. Do not exceed the recommended dose — Dhanuka Sempra is highly active at low doses.
Re-Entry Period: Do not enter treated fields for at least 12 hours after application without protective gear. Allow spray solution to dry fully before entering treated crop rows.
Tank-Mix Compatibility: Halosulfuron Methyl 75% WG can be combined with other recommended post-emergence herbicides where label permits. Always perform a jar test before mixing with unfamiliar products. Always add a non-ionic surfactant for best performance.
Safety Precautions and Handling:
Wear gloves, goggles, and a face mask before handling or spraying Dhanuka Sempra Herbicide.
Do not eat, drink, or smoke during mixing or application.
Avoid direct contact with skin and eyes; rinse immediately with clean water for 15 minutes if contact occurs.
Do not allow spray drift onto neighbouring crops; Dhanuka Sempra can damage non-grass broadleaf crops if contacted.
Keep children, pets, and livestock away from treated areas for at least 12 hours.
Wash all exposed skin thoroughly with soap and water after every spray session.
Triple rinse empty containers, puncture, and dispose of per local waste guidelines.
Storage Instructions:
Store Dhanuka Sempra in its original sealed container in a cool, dry place away from direct sunlight and moisture.
Keep away from food, animal feed, and seeds.
Store out of reach of children and farm animals.
Storage Temperature: Below 35°C.
Shelf Life: 2 years from the date of manufacture.
Product Specifications:
Specification | Details |
Product Name | Dhanuka Sempra Herbicide — Halosulfuron Methyl 75% WG |
Brand | Dhanuka Agritech Limited |
Sempra Herbicide Technical Name | Halosulfuron Methyl 75% WG (Water-Dispersible Granule) |
Chemical Class | Sulfonylurea |
HRAC Group | 2 (ALS / AHAS Inhibitor) |
Mode of Action | Selective Systemic Post-Emergence — inhibits ALS enzyme → blocks branched-chain amino acid synthesis (Valine, Leucine, Isoleucine) → weed starvation and death |
Formulation Type | WG — Water-Dispersible Granule |
Selectivity | Selective — safe for Sugarcane, Maize, and Bottle Gourd at recommended doses |
Application Method | Ground-Level Directed Foliar Spray |
Dose | 36 gm per acre |
Pack Sizes Available | 3.6 gm, 18 gm, 36 gm |
Country of Origin | India |
Shelf Life | 2 years from date of manufacture |
Pre-Harvest Interval | As indicated on the product label |