Swal Harmetry Herbicide - Glufosinate Ammonium 50% WG Non-Selective Post-Emergence Weed Control

Swal Harmetry is a non-selective, post-emergence herbicide from SWAL Corporation Ltd, formulated with Glufosinate Ammonium 50% WG (Water Dispersible Granules). It is designed to give fast, broad-spectrum control of grassy weeds, broad-leaf weeds, and sedges in non-crop areas, orchards, field boundaries, and as a directed spray in row crops. Because it works through strong contact action, Harmetry quickly knocks down actively growing weeds without leaving harmful residue in the soil, making it a practical choice for clearing fallow land, bunds, and plantation zones.

Harmetry works by blocking the glutamine synthetase enzyme inside weed tissues. This stops the plant from detoxifying ammonia, causing toxic ammonia to build up, which disrupts photosynthesis and leads to rapid drying and death of the weed. Being a non-selective herbicide, it kills every green plant it touches, so it must be applied only to unwanted vegetation or as a carefully directed spray that does not come in contact with crop foliage, stems, or green bark. Its water-dispersible granule form is easy to measure, mix, and handle, reducing dust exposure compared to older powder formulations.

Farmers commonly use Swal Harmetry at 400 grams per acre for weed burndown in non-crop areas, and as a directed spray between rows of established crops like cotton, chilli, and other vegetables. It is also suited for managing weeds in tea, coffee, rubber, and fruit orchards, as well as around field boundaries and farm bunds. With visible weed yellowing and wilting starting within a few days of spraying, Harmetry delivers the quick, reliable weed control that farmers need to keep their land clean and productive.

Key Benefits

• Fast weed knockdown: Visible yellowing and wilting of weeds starts within 2–3 days of spraying, with complete top-growth kill usually seen within 5–10 days.
• Broad-spectrum control: Effectively manages a wide range of annual and perennial grassy weeds, broad-leaf weeds, and sedges, including tough species like Bermuda grass and nut sedge.
• Non-selective action: Clears all unwanted green vegetation in non-crop areas, fallow land, bunds, and around field boundaries in a single application.
• No residual soil activity: Breaks down quickly in soil, making it relatively safe for the next crop in rotation and reducing the risk of carryover damage.
• Easy-to-handle WG formulation: Water-dispersible granules are simple to measure and mix, with less dust exposure compared to older powder formulations.
• Flexible timing: As a post-emergence herbicide, it can be applied after weeds have emerged, giving farmers flexibility in planning weed control.
• Useful in directed spray: Can be safely used between rows of established crops like cotton and chilli when applied with a hood or shield to avoid crop contact.

How It Works

Swal Harmetry contains Glufosinate Ammonium 50% WG, which belongs to the phosphinic acid chemical group and is classified under HRAC Group 10. Its mode of action is the inhibition of the glutamine synthetase enzyme, a key enzyme that plants use to detoxify ammonia produced during normal metabolism. When this enzyme is blocked, ammonia accumulates rapidly inside the weed tissues. This toxic build-up disrupts photosynthesis and other essential cell functions, causing the weed to dry out and die.

Because Harmetry works mainly through contact activity, the spray droplets must cover the actively growing green parts of the weed for effective control. It is a post-emergence herbicide, meaning it acts on weeds that have already emerged and have sufficient green leaf area to absorb the spray. The action is fast, with visible symptoms of yellowing and wilting appearing within a few days of application in warm, sunny weather. Complete knockdown of top growth usually follows within 5–10 days, depending on the weed species, growth stage, and weather conditions. Since it has no residual soil activity, Harmetry does not leave a lasting effect in the soil, which is an advantage when planning the next crop.

Technical Specifications

Attribute	Details
Product Name	Swal Harmetry Herbicide
Brand	SWAL Corporation Ltd
Technical Content	Glufosinate Ammonium 50% WG
Formulation	Water Dispersible Granules (WG)
Herbicide Type	Non-selective, Post-emergence
Chemical Group	Phosphinic Acid Herbicide
Mode of Action	Inhibits glutamine synthetase enzyme
HRAC Group	Group 10
Application Method	Post-emergence foliar spray
Pack Sizes Available	40 gm, 400 gm
Country of Origin	India

Recommended Dosage & Application

Use Area	Target Weeds	Dose Per Acre	Application Method
Non-crop areas	Annual and perennial weeds	400 grams	Foliar spray on green weed parts
Orchard areas (directed spray)	Broadleaf and grassy weeds	400 grams	Directed foliar spray avoiding crop contact
Field boundaries	Mixed weed population	As per label recommendation	Foliar spray

Dose per litre of water: Approximately 2–3 grams per litre of water, depending on weed density, spray volume, and application area. A typical rate is about 400 grams mixed in 200 litres of water per acre.

Method: Mix the required quantity of Harmetry with clean water and spray uniformly over weed-infested areas as a post-emergence foliar spray. Ensure complete coverage of weed foliage for best control.

When to Use

Apply Swal Harmetry when weeds are young and actively growing for the best control. Glufosinate Ammonium 50% WG performs most effectively when weeds have sufficient green leaf area to absorb the spray, typically at the 3–6 leaf stage. Spray during warm and sunny weather, preferably in the cool morning hours on a rain-free day.

• Apply after weed emergence for best results.
• Best time is when weeds are actively growing at the 3–6 leaf stage.
• Avoid application during drought stress, heavy rainfall, or strong wind conditions.
• Do not spray if rain is expected within 4–6 hours of application, as the product needs this time to become rainfast.
• One well-timed application is generally sufficient for controlling actively growing weeds. Repeat only when required according to label recommendations.

Step by Step Usage Instructions

1. Identify the weed species and confirm they are suitable targets for Glufosinate Ammonium 50% WG.
2. Measure the required quantity of Swal Harmetry according to the recommended dose (400 grams per acre).
3. Fill the spray tank halfway with clean water.
4. Add Harmetry herbicide slowly while continuously mixing to form a uniform solution.
5. Complete the tank filling with water and maintain proper agitation.
6. Spray Swal Harmetry uniformly on actively growing green weed parts using a knapsack sprayer with a flat fan nozzle.
7. For directed spray in row crops like cotton and chilli, use a hood or shield to avoid contact with crop foliage, stems, or green bark.
8. Use the prepared spray solution on the same day.
9. Clean spray equipment thoroughly after application.

Compatibility

Conduct a jar test before mixing Harmetry herbicide with other crop protection products. This simple test helps confirm that the products mix well together without forming lumps, separating, or reducing effectiveness. Always follow label recommendations when considering tank mixes.

Precautions & Safety

• Wear gloves, mask, protective clothing, and closed footwear while handling and applying Swal Harmetry.
• Do not eat, drink, or smoke during mixing and spraying.
• Avoid contact of the product with skin and eyes, and do not inhale spray mist during application.
• Do not spray on crop plants, as Glufosinate Ammonium 50% WG is a non-selective herbicide that kills all green vegetation it touches.
• Avoid spray drift to desirable vegetation and water bodies.
• Do not spray under windy conditions or just before rainfall.
• Use only the recommended dose of Harmetry herbicide.
• Wash hands, clothes, and spraying equipment after use.
• Keep the product away from children, animals, food, and water sources.

Storage

• Store Swal Harmetry in its original sealed container.
• Keep the herbicide in a cool, dry, and shaded place.
• Protect the product from moisture, direct sunlight, and extreme temperatures.
• Keep away from food, animal feed, seeds, and fertilizers.
• Store the product away from children and livestock.
• Close the pack properly after every use.
• Check the product label for shelf life and expiry details.