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