About Chempa herbicide
Chempa herbicide is a selective, systemic, broad-spectrum, acts as both pre-emergence and early post-emergence herbicide containing Pyrazosulfuron-Ethyl 70% WDG, widely used in rice for the control of sedges, grasses, and broadleaf weeds during the early stages of crop growth by helping rice plants grow without competition for nutrients, water, and sunlight.
Chempa herbicide Technical Name
Pyrazosulfuron-Ethyl 70% WD
Product Specifications
Mode of Entry: Systemic
Time of Application: Pre-emergence and early post-emergence
Mode of Action: Pyrazosulfuron-Ethyl belongs to the sulfonylurea group of herbicides. It is absorbed through the roots, shoots, and leaves of weeds and moves throughout the plant.
It inhibits the enzyme Acetolactate Synthase (ALS), which is essential to produce amino acids required for plant growth. As a result, targeted weeds stop growing, become yellow, and eventually die.
Key Features & Benefits Chempa herbicide
- Effective at very low application rates.
- Systemic action provides thorough weed control.
- Visible Effects:
Weed growth stops within a few days of application.
Yellowing and stunting appear within 7–10 days.
Complete control is generally achieved within 2–3 weeks, depending on weed species and field conditions.
Chempa remains effective after normal rainfall. However, excessive water flow from the field immediately after application should be avoided.
Provides residual weed suppression, helping maintain a weed-free environment during the early stages of rice growth.
Chempa herbicide Recommended Crop
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Crop
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Target Weeds
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Dosage / Acre
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Water Volume / Acre
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Dosage per Litre of Water
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Waiting Period
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Rice
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Echinochloa colona, Echinochloa crus-galli, Cyperus rotundus, Monochoria vaginalis, Ludwigia parviflora, Marsilea quadrifolia
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12 g
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200 L
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0.06 g/L
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43 days
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Method of Application
- Apply Chempa as a uniform spray using a knapsack or power sprayer. Ensure even coverage across the field for optimum weed control.
Best Time to Spray
- Apply 4–7 days after transplanting rice seedlings.
- Use before weed emergence or during the very early stages of weed growth.
- Maintain adequate soil moisture during application.
Compatibility, Safety & Storage
Tank-Mix Compatibility
- Consult an agronomist before mixing Chempa herbicide with other herbicides, fertilizers, or crop protection products. Conduct a jar test before large-scale mixing.
Safety Precautions
- Wear gloves, protective clothing, a mask, and safety goggles while spraying.
- Avoid spraying during windy conditions.
- Do not eat, drink, or smoke during application.
- Do not blow nozzle with mouth
- Wash hands and face thoroughly after spraying.
- Keep out of reach of children, pets, and livestock.
- In case of accidental ingestion, inhalation, or eye contact, seek immediate medical attention.
Storage
- Store in the original sealed container in a cool, dry place away from food, feed, water sources, and direct sunlight.
Chempa Expert Advice
“Dhanuka Chempa is a selective, broad-spectrum herbicide used in rice for the effective control of sedges, grasses, and broadleaf weeds.”-BigHaat Agronomy Expert
Additional Information & Restrictions
- Recommended only for rice.
- Apply only once per crop season unless otherwise advised.
- Do not use on crops other than those specified on the product label.
Disclaimer: This information is provided for reference purposes only. Always read and follow the instructions on the product label and accompanying leaflet before use.
