Florasulam 50g/L SC – Advanced Sulfonamide Herbicide for Cereal Crops

Product Positioning: A low-toxicity, highly selective sulfonamide herbicide formulated as a suspension concentrate (SC), targeting resistant broadleaf weeds in wheat and other cereals. Developed by Dow AgroSciences, it inhibits acetolactate synthase (ALS) to disrupt weed growth while ensuring crop safety

Core Advantages

Feature	Technical Highlights
Mode of Action	ALS inhibitor (IRAC Group 2) → blocks branched-chain amino acid synthesis in weeds
Target Weeds	Broadleaves: Stellaria media (chickweed), Capsella bursa-pastoris (shepherd’s purse), Galium aparine (cleavers), Sinapis arvensis (wild mustard)
Rainfastness	1–2 hours (SC formulation enhances adhesion)
Crop Safety	Low phytotoxicity in wheat; no yield impact at recommended doses
Resistance Mgmt	Effective against ALS-resistant weeds; ideal for rotation with auxin mimics (e.g., 2,4-D)

Application Guidelines

Registered Use (China & Canada):

Crop	Target Weeds	Dosage	Timing
Winter Wheat	Broadleaf weeds	75–90 mL/mu*	Post-emergence (weed 2–4 leaf stage)
Barley/Oats	Complex broadleaves	20–35 mL/ha	Pre-emergence or early post-emergence
*1 mu = 667 m²; Spray volume: 300–400 L/ha

Key Practices:

Apply to moist soil for optimal absorption; avoid drought conditions.
Do not spray during crop jointing or flowering to prevent injury.
Tank-mix options: Compatible with fenoxaprop-P-ethyl (grasses) but avoid organophosphates.

Safety & Environmental Profile

Parameter	Data	Regulatory Notes
Toxicity Class	Low toxicity (WHO Class U)	Safe for operators with standard PPE
Ecotoxicity	Toxic to fish & aquatic life	50m buffer from water bodies required
Soil Half-life	DT50: 7–14 days	Low leaching risk (GUS index: 1.8)
Re-entry Period	24 hours	—

Regulatory Status

China: Registered for winter wheat (Reg. No. LS200112)
Canada: Approved for MRLs in barley, oats, wheat (2002)
Global Equivalents: Marketed as Primus® (Dow) in EU cereals

Resistance Management Protocol

Rotate MoA Groups: Alternate with ACCase inhibitors (e.g., clodinafop) or auxin mimics (e.g., MCPA).
Limit Applications: Max 1 use per season to delay ALS resistance.
Monitor Fields: Check for weed escapes (e.g., Conyza canadensis).