Tribenuron-methyl 75% WDG Herbicide

Tribenuron-methyl 75% WDG (Wettable Dispersible Granule) is a sulfonylurea herbicide that inhibits acetolactate synthase (ALS), disrupting branched-chain amino acid synthesis in target weeds. It provides selective post-emergence control of broadleaf weeds in cereals (wheat, barley), rapeseed, and other crops. Its WDG formulation ensures excellent dispersibility, foliar adhesion, and rainfastness within 1 hour

 Technical Specifications

Parameter Specification
Active Ingredient Tribenuron-methyl 75% (w/w)
CAS No. 101200-48-0
Molecular Formula C₁₅H₁₇N₅O₆S
Appearance White crystalline granules
Melting Point 141°C
Density 1.5 g/cm³
Solubility 28 mg/L (pH 4), 2.04 g/L (pH 7)
Storage Stability 2–3 years at 0–6°C in sealed containers

Target Weeds & Efficacy

Primary Controlled Weeds:

  • Broadleaves: Chickweed (Stellaria media), Shepherd’s purse (Capsella bursa-pastoris), Corn spurry (Spergula arvensis), Wild mustard (Sinapis arvensis)

  • Complex Weeds: Controls resistant biotypes of Galium aparine (cleavers) and Cephalanoplos setosum (thistle)

Efficacy Data:

  • Field Trials (Spring Rapeseed):

    • Dose: 37.5 g/ha (28.1 g a.i./ha)

    • Control: >70% reduction in Chenopodium album (lambsquarters) and Galium aparine

    • Crop Safety: No phytotoxicity in rapeseed; yield increase up to 8.7%

Application Guidelines

Crop Target Weeds Dosage Timing
Wheat Broadleaf weeds 20–35 g/ha 2–4 leaf stage of weeds
Rapeseed Complex broadleaves 37.5 g/ha 3–5 leaf stage of crop
Barley Chickweed, Mustard 22.5–30 g/ha Post-emergence

Critical Notes:

  • Spray Volume: 300–400 L/ha for uniform coverage

  • Rainfastness: Requires ≥1 hour dry period after application

  • Avoid Use during crop jointing or flowering stages

Safety & Environmental Profile

Parameter Data
Acute Oral LD50 >5,000 mg/kg (rat) – Practically non-toxic
Dermal LD50 >2,000 mg/kg (rabbit)
Ecotoxicity Low risk to bees; toxic to aquatic life
Re-entry Period 24 hours

Precautions:
⚠️ Buffer Zones: Maintain 50m from water bodies
⚠️ Tank-Mix Restrictions: Incompatible with organophosphates; test compatibility with adjuvants

Resistance Management

  • Rotation Partners:

    • ACCase inhibitors (e.g., fenoxaprop-P-ethyl) for grass weeds

    • Auxin mimics (e.g., 2,4-D) for broadleaf resistance

  • Max Applications: 1 per season to delay ALS-resistance development

Packaging & Supply

  • Commercial Packs: 25 kg/fiber drum, 1 kg/foil bag (customizable)

  • Minimum Order: 1 kg (sample available)

  • Lead Time: 15–30 days for bulk orders

Performance Advantages

Feature Tribenuron-methyl 75% WDG Conventional Herbicides
Weed Spectrum >20 broadleaf species Limited to common weeds
Crop Safety High (no residue in grains) Moderate risk of phytotoxicity
Cost Efficiency Low dose (g/ha scale) Higher volume required
Rainfastness 1 hour 4–6 hours

FAQ

Q: Can it control mature weeds?
A: Optimal for 2–4 leaf stages; efficacy declines beyond 5 leaves

Q: Compatibility with fertilizers?
A: Compatible with urea solutions; avoid alkaline additives (pH >8)

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