HPM Biochlor Herbicide - Chlorimuron Ethyl 25% WP for Soybean & Legume Crops

HPM Biochlor is a selective post-emergence herbicide containing Chlorimuron Ethyl 25% WP (Wettable Powder). It is specially designed to control a wide range of broadleaf weeds and grasses in soybean, groundnut, and other legume crops. This herbicide works through systemic action — it is absorbed by the weed leaves and moves throughout the plant to stop growth from the inside.

Chlorimuron Ethyl belongs to the sulfonylurea group of herbicides and acts by inhibiting the ALS (Acetolactate Synthase) enzyme, which is essential for protein synthesis in susceptible weeds. Once applied, weeds stop growing quickly, with visible symptoms appearing within 3–5 days and complete control achieved in 7–14 days. Because of its selective action, HPM Biochlor targets only the weeds and does not harm the main crop when used as recommended.

This herbicide is a practical and cost-effective solution for farmers dealing with stubborn broadleaf weeds like Amaranthus, Chenopodium (Lamb's Quarters), Xanthium (Cocklebur), Parthenium (Carrot Grass), and grassy weeds like Echinochloa (Barnyard Grass) and Cyperus (Sedges). With a low dosage requirement of just 20–25 grams per acre and long-lasting residual activity that prevents weed regrowth, HPM Biochlor helps farmers achieve cleaner fields and better yields with fewer repeat applications.

Key Benefits

• Broad-spectrum weed control: Effectively targets both broadleaf weeds and grasses in a single application.
• Selective action: Controls weeds without damaging the main crop — safe for soybean, groundnut, and legume crops.
• Systemic absorption: Quickly absorbed by weed leaves and translocated to all parts, ensuring complete control from roots to shoots.
• Long-lasting residual activity: Prevents weed regrowth for an extended period, reducing the need for multiple sprays.
• Rainfast in 2–3 hours: Becomes rainfast quickly after application, giving farmers flexibility even in unpredictable weather.
• Low dosage requirement: Only 20–25 grams per acre needed, making it a cost-efficient weed management option.
• Higher crop yields: Weed-free crop growth leads to better nutrient uptake, less competition, and improved productivity.

How It Works

HPM Biochlor contains Chlorimuron Ethyl, which belongs to the sulfonylurea chemical group. It works as an ALS (Acetolactate Synthase) inhibitor. When sprayed on actively growing weeds, the herbicide is quickly absorbed through the leaves and stems. It then moves systemically (through the plant's vascular system) to reach growing points in roots, stems, and shoots.

Once inside the weed, Chlorimuron Ethyl blocks the ALS enzyme, which is essential for producing amino acids needed for protein synthesis and cell growth. Without these proteins, the weed's growth stops almost immediately. Visible symptoms like yellowing, stunting, and wilting appear within 3–5 days, followed by complete weed death in 7–14 days. Because the herbicide is selective, the target crop (soybean, groundnut, pulses) can metabolize it safely without harm.

Technical Specifications

Parameter	Details
Brand Name	HPM Biochlor
Active Ingredient	Chlorimuron Ethyl 25% WP
Formulation Type	Wettable Powder (WP)
Mode of Action	Post-Emergence, Systemic (ALS Inhibitor)
Chemical Group	Sulfonylurea
Application Type	Foliar Spray
Target Weeds	Broadleaf weeds (Amaranthus, Chenopodium, Xanthium, Parthenium) and Grasses (Echinochloa, Cyperus)
Target Crops	Soybean, Groundnut, Pulses (Legume Crops)
Rainfast Time	2–3 hours after application
Weed Death Time	7–14 days

Recommended Dosage & Application

Crop	Dosage per Acre	Water Volume per Acre	Application Timing	Method
Soybean	20–25 grams	200–240 liters	2–3 weeks after sowing	Foliar spray using knapsack sprayer with flat-fan nozzle
Groundnut	20–25 grams	200–240 liters	2–3 weeks after sowing	Foliar spray using knapsack sprayer with flat-fan nozzle
Pulses (Legume Crops)	20–25 grams	200–240 liters	2–3 weeks after sowing	Foliar spray using knapsack sprayer with flat-fan nozzle

When to Use

Apply HPM Biochlor 2–3 weeks after sowing the crop, when weeds are in their early growth stages (2–4 leaf stage). This is the most effective time because young, actively growing weeds are most susceptible to ALS-inhibiting herbicides. At this stage, the crop is also well-established enough to tolerate the selective herbicide without stress.

For best results, apply when the weather is calm and dry — avoid spraying during windy conditions (to prevent drift to non-target crops) or when rain is expected within 2 hours (the product is rainfast after 2–3 hours, but immediate rain can wash it off). Early morning or late afternoon application is ideal when temperatures are moderate and weed leaves are actively absorbing the spray.

Step by Step Usage Instructions

1. Calculate the right amount: Measure 20–25 grams of HPM Biochlor for each acre of crop.
2. Prepare the spray solution: Mix the measured herbicide in a small amount of water first to make a slurry, then add to the full 200–240 liters of water per acre. Stir well to ensure the wettable powder dissolves completely.
3. Fill the sprayer: Pour the prepared solution into a clean knapsack sprayer fitted with a flat-fan nozzle for uniform coverage.
4. Spray evenly: Apply the solution as a foliar spray, ensuring all weed foliage is thoroughly covered. Do not over-spray or allow runoff.
5. Clean equipment: After spraying, thoroughly clean the sprayer and all equipment with water to remove any herbicide residue and prevent damage to other crops in future use.
6. Observe results: Weeds will stop growing within days, with visible yellowing and wilting in 3–5 days and complete control in 7–14 days.

Compatibility

HPM Biochlor is compatible with most commonly used herbicides and insecticides. It can also be mixed with most fertilizers. However, before mixing with any other chemical for the first time, always conduct a jar test — mix small quantities of both products in a jar of water and check for any signs of clumping, settling, or separation. If the mixture is stable, it is safe to use. Do not mix with alkaline substances or products that may reduce herbicide effectiveness.

Precautions & Safety

• Personal protective equipment: Wear gloves, goggles, and a mask while handling and spraying the herbicide.
• Avoid spray drift: Do not spray during windy conditions. Protect nearby non-target crops, water bodies, and sensitive areas from drift.
• Weather precautions: Do not apply during rainy weather or when heavy rain is expected within 2–3 hours.
• Sprayer cleaning: Thoroughly clean all spraying equipment after use to prevent residue buildup and accidental damage to other crops.
• Storage: Store in a cool, dry place away from food, feed, and children. Keep the container tightly sealed.
• Disposal: Do not reuse empty containers for any purpose. Dispose of them safely according to local guidelines.

Side Effects & Phytotoxicity

HPM Biochlor is a selective herbicide with high tolerance levels for soybean, groundnut, and legume crops when used at the recommended dosage. However, applying higher than recommended doses or using on non-target crops may cause crop injury. Avoid spraying on crops under stress from drought, waterlogging, or pest attack. Always follow the recommended dosage and timing to ensure crop safety.

PHI / REI & Storage

• Pre-Harvest Interval (PHI): Follow the label instructions on the product packaging for the specific waiting period before harvest.
• Shelf Life: Store in original container in a cool, dry place away from direct sunlight. Use within the expiry date mentioned on the pack.
• Storage Conditions: Keep in a dry, well-ventilated area at room temperature. Protect from moisture and extreme heat.