HPM Gadar Herbicide - Pendimethalin 30% EC for Pre-Emergence Weed Control in Wheat, Soybean & Cotton

HPM Gadar is a pre-emergence selective herbicide containing Pendimethalin 30% EC, belonging to the dinitroaniline chemical group. It is designed to control annual grasses and broadleaf weeds in a wide range of crops including wheat, soybean, cotton, chilli, potato, maize, pea, carrot, cabbage, and onion. This herbicide works by forming a chemical barrier on the soil surface that stops weed seeds from germinating and emerging, giving your crop a clean start during its most important early growth phase.

As a selective pre-emergence herbicide, HPM Gadar targets weeds without harming the crop when used correctly. It is absorbed by the roots and shoots of germinating weeds and disrupts cell division, causing the weed seedlings to die before they can emerge from the soil. This makes it an effective tool for integrated weed management programs, reducing the need for manual weeding and helping farmers save on labour costs. The product is available in an emulsifiable concentrate (EC) formulation and is registered under CIR-40327/2002-Pendimethalin (EC) (223)-11.

Key Benefits

• Pre-emergence weed control: Stops annual grasses and broadleaf weeds before they emerge, giving crops a clean start.
• Selective action: Safe for recommended crops like wheat, soybean, cotton, chilli, and more when used as directed.
• Reduces labour costs: One spray can replace 8-10 days of manual weeding, saving significant time and money.
• Broad-spectrum control: Targets both grassy weeds (like Echinochloa, Phalaris minor) and broadleaf weeds (like Amaranthus, Chenopodium).
• Long-lasting protection: Creates a chemical barrier in the top 1-2 inches of soil that stays active for weeks.
• Supports integrated weed management: Works well as part of a complete weed control program without harming the crop.

How It Works

HPM Gadar contains Pendimethalin, which belongs to the dinitroaniline class of herbicides. Its mode of action is inhibition of microtubule assembly (IRAC MoA Code: K1). When sprayed on the soil surface immediately after sowing, the herbicide forms a thin, uniform chemical layer in the top 1-2 inches of soil. This layer acts as a barrier.

As weed seeds begin to germinate, their young roots and shoots come into contact with this treated soil layer and absorb the chemical. Pendimethalin then stops cell division (mitosis) in the growing points of the weed seedling. Without the ability to divide and grow cells, the weed cannot develop proper roots or shoots. The seedling dies before it can emerge from the soil surface.

Because crop seeds are sown deeper than this chemical barrier, their root systems grow below the treated layer and remain safe. The herbicide is absorbed primarily by the roots and shoots of germinating weeds, making it most effective when applied before weeds emerge. It does not kill established weeds — it prevents new ones from sprouting.

Technical Specifications

Parameter	Details
Brand	HPM Chemicals and Fertilizers Ltd.
Product Name	Gadar
Technical Name	Pendimethalin 30% EC
Chemical Group	Dinitroaniline
IRAC MoA Code	K1 (Microtubule Assembly Inhibition)
Formulation	Emulsifiable Concentrate (EC)
Selectivity	Selective
Time of Application	Pre-emergent
Mode of Action	Systemic (absorbed by roots and shoots)
Toxicity Label	Class III (Slightly Hazardous) - Blue/Green Triangle
Registration No.	CIR-40327/2002-Pendimethalin (EC) (223)-11
Available Pack Sizes	500 ml to 30 litres
Country of Origin	India

Recommended Dosage & Application

HPM Gadar contains Pendimethalin 30% EC, so its dose is the Pendimethalin 30% EC technical dose. It is the same for every brand: dose changes by crop and soil type, not by brand name. The label dose is given per hectare, and one hectare is 2.47 acres, so divide by 2.47 to get the per-acre dose. Active ingredient is the pendimethalin itself; formulation is the 30% EC liquid, so 1.0 kg of active ingredient per hectare is 3.3 litres of formulation per hectare, 1.25 kg is 4.2 litres, and 1.5 kg is 5.0 litres.

Crop	Active ingredient per hectare	Formulation per hectare	Formulation per acre	Water per acre
Wheat, light soil	1.0 kg	3.3 litres	1300 ml	200 to 280 litres
Wheat, medium soil	1.25 kg	4.2 litres	1700 ml	200 to 280 litres
Wheat, heavy soil	1.5 kg	5.0 litres	2000 ml	200 to 280 litres
Cotton	0.75 to 1.25 kg	2.5 to 4.165 litres	1000 to 1700 ml	200 to 280 litres
Paddy	1.0 to 1.5 kg, light to heavy soil	3.3 to 5.0 litres	1300 to 2000 ml	200 to 280 litres
Soybean	0.75 to 1.0 kg	2.5 to 3.3 litres	1000 to 1300 ml	200 to 280 litres
Pigeon Pea	0.7 to 1.0 kg	2.5 to 3.33 litres	1000 to 1350 ml	About 200 litres

At 200 litres of water per acre, wheat dose per litre is 6.5 ml in light soil, 8.5 ml in medium soil and 10 ml in heavy soil, or about 100 ml, 130 ml and 150 ml in a 15-litre knapsack sprayer. Apply within 0 to 3 days after sowing, on moist soil, before weeds emerge, with a flat fan or flood jet nozzle for uniform soil coverage.

When to Use

HPM Gadar must be applied as a pre-emergence treatment — within 0 to 3 days after sowing. The ideal time is immediately after sowing but before the crop seeds germinate and before any weeds emerge. The soil must have adequate moisture at the time of application for the herbicide to form an effective chemical barrier. If the soil is dry, the herbicide will not activate properly and weed control will be poor.

This early application window is critical because Pendimethalin works by stopping weed seeds from germinating. Once weeds have already emerged above the soil surface, this product will not control them. For best results, apply when the weather is calm (to avoid spray drift) and when rain is not expected immediately after spraying, as heavy rain may disturb the chemical barrier.

Step by Step Usage Instructions

1. Prepare the field: Ensure the field is properly prepared and crop seeds are sown at the correct depth. The soil should be moist but not waterlogged.
2. Wear protective gear: Put on hand gloves, a mask, goggles, and boots before handling the product.
3. Fill the spray tank: Fill the spray tank halfway with clean water.
4. Add the herbicide: Measure the required dose (100 ml per 16L sprayer or as per per-acre dosage) and add it gradually to the tank while stirring.
5. Mix thoroughly: Fill the remaining water and mix well to ensure uniform suspension.
6. Use correct nozzle: Use a Flat Fan or Flood Jet nozzle. Do not use cone nozzles as they cause spray drift.
7. Apply uniformly: Spray evenly over the entire soil surface immediately after sowing. Ensure complete coverage for a uniform chemical barrier.
8. Clean equipment: Wash the spray tank and all equipment thoroughly after use. Dispose of empty containers responsibly.

Precautions & Safety

• Wear hand gloves, mask, goggles, and boots while mixing and applying the product.
• Do not smoke, eat, or drink during application.
• Avoid skin and eye contact. In case of contact, wash immediately with plenty of water.
• Store the product in a cool, dry place away from sunlight and out of reach of children.
• Keep away from food, feed, and drinking water.
• Avoid spray drift to water bodies, as Pendimethalin is toxic to fish and aquatic life.
• Do not use in areas where aquaculture or pisciculture is practiced alongside rice cultivation.
• Wash hands and face thoroughly with soap and water after handling the product.
• Seek medical attention immediately in case of accidental ingestion or exposure.

Side Effects & Phytotoxicity

Pendimethalin is toxic to fish and aquatic organisms. Do not allow the product to enter water bodies, ponds, or drainage systems. Avoid use near fish ponds or areas where aquaculture is practiced. The EC formulation is orange in colour and may stain skin, clothes, and equipment — this also helps the user see where the spray has been applied.

PHI / REI & Storage

Crop	PHI (Pre-Harvest Interval)
Cotton	110 days
Soybean	90 days
Wheat	100 days

Storage: Store in a cool, dry place away from direct sunlight and moisture. Keep the container tightly closed when not in use. Store away from food, feed, and animal feed. Keep out of reach of children and unauthorized persons.

HPM Gadar Price and Pack Sizes

HPM Gadar price starts at Rs. 255 for 500 ml. The 1 litre pack is Rs. 450, against an MRP of Rs. 900. All pack sizes currently listed on this page are shown below, with the price for the selected pack shown at checkout.

Pack Size	Price	MRP
500	Rs. 255	Rs. 475
1	Rs. 450	Rs. 900
(500ml x 2) 1	Rs. 495	Rs. 950
(500ml x 3) 1.5	Rs. 720	Rs. 1425
(1L x 2) 2	Rs. 882	Rs. 1800
(500ml x 5) 2.5	Rs. 1145	Rs. 2375
(1L x 3) 3	Rs. 1290	Rs. 2700
5	Rs. 1680	Rs. 4000
(1L x 5) 5	Rs. 2100	Rs. 4500
(500ml x 10) 5	Rs. 2195	Rs. 4750
(5L x 2) 10	Rs. 3280	Rs. 8000
(1L x 10) 10	Rs. 4100	Rs. 9000
(5L x 3) 15	Rs. 4900	Rs. 12000
(5L x 5) 25	Rs. 8130	Rs. 20000
(5L x 6) 30	Rs. 9700	Rs. 24000

Compare Pendimethalin 30% EC Brands: Price, Packs and Cost per Acre

Do not compare these brands on dose, weeds controlled, mode of action or safety. They are the same technical, so those are identical. What actually differs for a buyer is 1-litre price, discount against MRP, smallest pack for a small field, largest bulk pack, cheapest per-litre price, and cost per acre at the same dose. The table below uses Spraykaro prices, with wheat cost per acre at the medium-soil dose of 1700 ml per acre.

Brand	1-litre price	1-litre MRP	Discount on 1 litre	Cheapest per litre	Packs	Wheat cost per acre, medium soil
IIL Pendamil	Rs. 470	Rs. 700	33%	Rs. 365, 100-litre pack	14 packs, 500 ml to 100 litres	Rs. 799
GSP Pendifix	Rs. 450	Rs. 680	34%	Rs. 345, 100-litre pack	8 packs, 1 litre to 100 litres	Rs. 765
Nichino Pendistar	Rs. 450	Rs. 1000	55%	Rs. 345, 100-litre pack	8 packs, 1 litre to 100 litres	Rs. 765
UPL Dost	Rs. 480	Rs. 750	36%	Rs. 375, 100-litre pack	8 packs, 1 litre to 100 litres	Rs. 816
SWAL Pendi	Rs. 470	Rs. 750	37%	Rs. 365, 100-litre pack	8 packs, 1 litre to 100 litres	Rs. 799
HPM Gadar	Rs. 450	Rs. 900	50%	Rs. 323, 30-litre pack	15 packs, 500 ml to 30 litres	Rs. 765

Cheapest per acre for wheat is Pendifix, Pendistar and Gadar, at Rs. 765 for medium soil. Cheapest per litre in bulk is Gadar at Rs. 323, but only up to 30 litres; for 100 litres, Pendifix and Pendistar are cheapest at Rs. 345 per litre. Only Pendamil and Gadar offer a 500 ml single pack, for a small field. Read more: Pendimethalin 30% EC technical page, Pendimethalin 30 EC dose per acre for wheat, Pendimethalin 30 EC price and brand comparison in India, and Pendimethalin uses, weeds controlled and when to apply.