Weedblock – Advanced Post-Emergence Weed Control for Pulses & Oilseeds

Weed control is one of the most critical aspects of sustainable farming, particularly in pulses and oilseed crops where early-stage competition from weeds can cause significant yield losses. For farmers looking for reliable, cost-effective, and long-lasting weed management, Weedblock (Imazethapyr 10% SL) by ADAMA is an ideal solution.

Weedblock is a selective post-emergence herbicide designed to control a wide range of broadleaf weeds and grassy weeds that commonly occur in soybean, groundnut, black gram, green gram, red gram, and other legume crops. With its broad-spectrum efficacy and safe profile for crops, Weedblock offers a smart weed control strategy tailored for Indian farming conditions.

Product Composition

• Technical Name: Imazethapyr

• Concentration: 10% SL (Soluble Liquid)

• Formulation Type: SL (water-soluble concentrate)

Mode of Action

Weedblock works by inhibiting the ALS (acetolactate synthase) enzyme, a key catalyst in the synthesis of branched-chain amino acids (valine, leucine, and isoleucine). These amino acids are essential for plant growth and protein synthesis.

Once absorbed by the leaves and roots of the weed, Weedblock translocates systemically throughout the plant. It disrupts cell division and growth in the meristematic tissues, leading to growth arrest, chlorosis, and eventually plant death.

Unlike contact herbicides that burn only the surface, Weedblock offers deep, systemic action to control both visible and hidden weed populations in the field.

Recommended Crops

Weedblock is suitable for use in the following crops:

• Soybean

• Groundnut (Peanut)

• Black gram (Urad dal)

• Green gram (Moong dal)

• Red gram (Arhar or Tur)

• Other pulses and legume crops

These crops are especially sensitive to early weed competition, and Weedblock’s selectivity ensures safety and vigorous crop growth while eliminating unwanted weed pressure.

Target Weeds

Weedblock effectively controls both grassy and broadleaf weeds, including:

• Echinochloa spp. (Barnyard grass)

• Digitaria spp. (Crabgrass)

• Amaranthus spp. (Pigweed)

• Commelina benghalensis (Benghal dayflower)

• Trianthema portulacastrum (Horse purslane)

• Cyperus spp. (Nutsedge)

• Celosia argentea (Cockscomb)

This wide coverage makes it an ideal solution for farmers battling multiple weed species in a single field.

Time of Application

Weedblock is a post-emergence herbicide, and its timing is critical for best results. The ideal time for application is:

• 15 to 20 days after sowing, when both the crop and the weeds have emerged

• Weeds should be in the 2-4 leaf stage and actively growing

• Ensure adequate soil moisture at the time of application for enhanced absorption and translocation

Avoid spraying during drought or water-stressed conditions, as that can reduce the herbicide's effectiveness.

Dosage and Application

• Recommended Dose: 750–1000 ml per hectare (based on weed infestation)

• Spray Volume: 200–300 liters of water per hectare

• Spray Equipment: Use a knapsack sprayer fitted with a flat-fan or flood-jet nozzle for uniform coverage

• Mixing Instructions:

  1. Fill the spray tank with half the required water

  2. Add the recommended quantity of Weedblock

  3. Stir well to create a uniform emulsion

  4. Add the remaining water and mix again

Always perform a small-scale jar test when mixing Weedblock with other chemicals to ensure compatibility.

Benefits of Using Weedblock

✅ Selective and Crop-Safe

Weedblock selectively targets weeds while being completely safe for major legume crops like soybean and groundnut, ensuring no phytotoxic effects on the crop.

✅ Broad-Spectrum Weed Control

It effectively controls both grassy and broadleaf weeds, giving farmers a one-stop solution for complex weed problems.

✅ Systemic Action

With both foliar and root absorption, Weedblock travels throughout the weed plant, killing it from the inside and preventing regrowth.

✅ Reduces Weed Competition

By eliminating weeds early in the crop’s life cycle, it ensures better access to water, nutrients, and sunlight for the crop.

✅ Minimizes Manual Labor

With effective chemical weed control, the need for expensive manual or mechanical weeding operations is greatly reduced.

✅ Supports Higher Yields

A weed-free environment boosts crop health, leading to better flowering, pod formation, and ultimately higher yields.