2,4-D Amine Salt 58% SL Herbicide Uses

2,4-D Amine Salt 58% SL is a systemic, selective post-emergence herbicide from the phenoxy-acetic acid ("synthetic auxin") chemical group, registered for use in India under the Insecticides Act, 1968, formulated as a soluble concentrate (SL). It is registered for the control of broadleaf weeds and certain sedges across a range of field crops — including wheat, maize, sugarcane, sorghum and potato — applied as a post-emergence spray directly over the standing crop. 2,4-D is one of the oldest and most widely used herbicides in Indian agriculture. This page lists its mode of action, key benefits and the crop-wise recommended dosage as documented on manufacturer labels and cross-checked across independent retailer listings.

Which Weeds Does This Control? (Field Identification Guide)

Not sure whether the weeds in your field match this herbicide's use case? This guide helps identify which weeds this herbicide controls.

Mode of Action

2,4-D belongs to the phenoxy-acetic acid group of herbicides (Group 4, "synthetic auxins"). It is a systemic herbicide, absorbed mainly through the leaves — and to a lesser extent through the roots — of actively growing broadleaf weeds, and it moves throughout the plant via the phloem (the plant's food-transport tissue). It works by mimicking the plant's own natural growth hormone, auxin, but at a far higher and unregulated concentration than the plant can control. This triggers uncontrolled, disorganised cell division and elongation in susceptible broadleaf weeds — causing stems and leaves to twist and curl abnormally (a symptom called epinasty), followed by collapse of the vascular tissue that carries water and nutrients, and death of the plant over one to two weeks. Grasses and cereal crops such as wheat, maize and sugarcane are naturally tolerant because their narrow-leaved growth habit limits herbicide uptake and retention, and they can metabolise (detoxify) 2,4-D faster than broadleaf weeds — this difference is what gives 2,4-D its crop selectivity.

Features & Benefits

• Broad-spectrum, economical control of a wide range of broadleaf weeds and certain sedges across several major field crops — wheat, maize, sugarcane, sorghum and potato — from a single herbicide.
• Systemic action carries the herbicide throughout the weed, controlling the root system as well as visible top growth — useful against perennial broadleaf weeds that can otherwise regrow from underground parts.
• Selective to cereal and grass crops at the recommended dose, allowing post-emergence use directly over standing wheat, maize and sugarcane without crop injury when label directions are followed.
• One of the most extensively used and long-established herbicides in Indian and global agriculture, with a well-documented usage history and comparatively low per-acre cost.

Recommended Usage of 2,4-D Amine Salt 58% SL Herbicide

The table below gives the recommended dose and water volume per acre for each crop, based on manufacturer and major agri-retailer label data. Always spray in the recommended water volume for uniform coverage, and confirm against the current product label before use.

The crop-wise doses above are drawn primarily from a major agri-retailer’s published label table for this product, converted where necessary using 1 ha ≈ 2.47 acres, and have now been cross-checked against the Government of India’s official CIB & RC list of approved herbicide uses for 2,4-D Dimethyl Amine salt 58% SL, which lists closely matching per-hectare rates for Wheat, Maize, Sorghum, Potato and Sugarcane once converted to a per-acre basis (within the usual rounding tolerance of such unit conversions). The CIB list does not support a uniform 90-day waiting period for these crops — it gives a PHI of 50–60 days for Maize only, and does not specify a PHI for Wheat, Sorghum, Potato or Sugarcane; always confirm the current PHI printed on your product label before harvest.

How to Use

1. Identify your crop and target weed from the table above, and confirm the correct dose per acre — the dose and water volume differ considerably between crops.
2. Since this is a soluble concentrate (SL), the measured dose can be added directly to the spray tank with water and mixed thoroughly — no separate paste-making step is needed as with wettable powders.
3. Spray uniformly over the crop when broadleaf weeds are small and actively growing (2–4 leaf stage), as per the timing given for your crop in the table above — spraying weeds at a later, more mature stage significantly reduces effectiveness.
4. Use a knapsack or power sprayer fitted with a flat-fan nozzle, and spray during calm weather with no wind — 2,4-D is highly prone to spray drift and vapour drift, and even small amounts reaching neighbouring broadleaf crops (cotton, vegetables, oilseeds, grapes, fruit orchards) can cause severe, visible injury.
5. Use a dedicated sprayer for 2,4-D wherever possible; if the same sprayer must be used for other crops later, wash it out thoroughly multiple times with water and a tank-cleaning agent, as even tiny herbicide residues left in a sprayer can severely damage a subsequent sensitive crop.
6. Do not spray when rain is expected within a few hours, and avoid irrigating the field immediately after spraying, to allow the herbicide time to be absorbed by the weeds.

Precautions & Safety

• Wear appropriate PPE — mask/respirator, gloves, goggles and full-sleeved clothing — while mixing and spraying, and avoid inhaling spray mist.
• 2,4-D spray and vapour drift onto sensitive broadleaf crops — including cotton, vegetables, pulses, oilseeds, grapes and other fruit crops — is a well-documented, real-world cause of crop injury; never spray on windy days, and maintain a generous buffer distance from neighbouring sensitive crops.
• Use a sprayer that has not previously been used for 2,4-D (or has been thoroughly decontaminated) when next spraying insecticides, fungicides or other herbicides on sensitive crops, as trace residues are a common cause of unexplained crop injury.
• Follow the recommended dose strictly — both underdosing (poor weed control) and overdosing (risk of injury even to the treated cereal crop under certain conditions) reduce field performance and safety.
• Store in the original, tightly closed container in a cool, dry place away from direct sunlight, food and feed, and out of reach of children and livestock; store separately from seeds and planting material.
• Wash hands, face and any exposed skin thoroughly with soap and water after handling or spraying, and change out of contaminated clothing before eating, drinking or smoking.

Brand names mentioned on this page are registered trademarks of their respective owners and are referenced here for identification purposes only; FarmMate is not affiliated with or endorsed by these brands. This page is for general information only — always consult your local agricultural extension office and confirm the current product label before use.