Topramezone 2% + Nicosulfuron 3% + Terbuthylazine 20% OD

TOPRAMEZONE 2% + NICOSULFURON 3% + TERBUTHYLAZINE 20% OD
Herbicide

TOPRAMEZONE 2% + NICOSULFURON 3% + TERBUTHYLAZINE 20% OD

A post-emergence Oil Dispersion (OD) herbicide containing three complementary active ingredients that provide broad-spectrum control of annual grasses and broadleaf weeds in maize. Delivering rapid knockdown, residual soil activity, and extended weed control for improved crop establishment and higher yield potential.

Target Weeds
Barnyardgrass, Crabgrass, Foxtails, Goosegrass & Amaranthus (Pigweed)
Mode of Action
HRAC 27 (HPPD Inhibitor) + HRAC 2 (ALS Inhibitor) + HRAC 5 (PS II Inhibitor)
Use Sites / Crops
Maize (Corn)
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Active: Topramezone + Nicosulfuron + Terbuthylazine Formulation: OD (Oil Dispersion) Post-Emergence + Soil Residual Triple HRAC Group 27 + 2 + 5 Action

Product Information

Mode of Action

Topramezone (HRAC Group 27 / HPPD inhibitor) inhibits carotenoid biosynthesis, causing tissue bleaching and necrosis. Nicosulfuron (HRAC Group 2 / ALS inhibitor) inhibits acetolactate synthase, preventing essential amino acid synthesis and halting weed growth. Terbuthylazine (HRAC Group 5 / Photosystem II inhibitor) inhibits photosynthesis and provides residual soil activity against germinating weed seeds. This combination delivers foliar and residual control while managing resistance risks.

Target Weeds
  • Echinochloa crus-galli (Barnyard grass)
  • Digitaria sanguinalis (Crabgrass)
  • Setaria spp. (Foxtails)
  • Eleusine indica (Goosegrass)
  • Amaranthus spp. (Pigweed)
  • Annual grass and broadleaf weeds

Recommended Application Guidance

Crop Target Weeds Application Guidance
Maize Annual grasses and broadleaf weeds Apply early post-emergence when maize is at the 2–6 leaf stage and weeds are actively growing (2–4 leaf stage). Uniform spray coverage is essential for optimum control.
Maize Mixed weed flora Apply before weeds exceed the recommended growth stage. Avoid applications to stressed weeds or crops affected by drought, waterlogging, nutrient deficiency, or extreme temperatures.
Maize Residual weed control The terbuthylazine component provides residual soil activity, suppressing subsequent weed emergence for several weeks after application. Adequate soil moisture following application improves residual performance.
For specific L/ha or ml/ha dosage rates and local spray volume recommendations in maize, please refer to the registered product label or consult local agricultural extension specialists.

Application Instructions

1. Early Post-Emergence Timing (2–6 Maize Leaf Stage)
Apply as an early post-emergence spray when maize is in the 2–6 leaf stage and weeds are actively growing in the 2–4 leaf stage. Ensure application occurs before weeds exceed this stage for maximum control.
2. Crop Stress Avoidance & Moisture Activation
Do not spray crops or weeds experiencing environmental stress caused by drought, frost, extreme heat, or waterlogging. Ensure adequate soil moisture following application to properly activate the terbuthylazine residual barrier in the soil.

Safety & Environmental Care

Always wear appropriate personal protective equipment (gloves, goggles, face mask, protective suit) during handling, mixing, and application. Avoid spray drift onto non-target broadleaf crops and nearby aquatic habitats. Store in original sealed container in a cool, dry, well-ventilated location away from food, drink, and animal feed.

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