Sodio® 50WGis a Selective post-emergence Herbicide for the control of certain Broad-leaved and Grass Weeds in autumn and spring sown Wheat, Durum Wheat, Triticale, Ryecorn and Barley.
Active Ingredient:
50g/kg Iodosulfuron-methyl-sodium and 150g/kg Mefenpyr-diethyl (safener) in the form of a Water Dispersible Granule.
Where It’s Used:
– Wheat (including Durum).
– Barley.
– Triticale.
– Ryecorn.
Not Used In:
– Oats (label restriction).
What It Controls:
– Grass Weeds (key strength).
– Annual Poa.
– Ryegrass.
– Lesser Canary Grass.
– Broadleaf Weeds.
– Chickweed.
– Cleavers.
– Spurrey.
– Yarrow.
– Broadleaf Dock.
– Stinking Mayweed.
– One of the few ALS herbicides that hits both Grasses + BLWs in Cereals.
How It Works:
– Absorbed through foliage.
– Moves systemically through plant.
– Inhibits ALS enzyme → stops growth.
Result:
– Growth stops quickly.
– Symptoms develop over 1–3 weeks (typical ALS pattern).
Application Guidance: (from label/tech guide).
– Spray volume 200–300 L/ha.
Apply With:
– Fine droplets.
– Even coverage.
Critical Requirement:
– Must add Result® oil-based surfactant → essential for performance.
Mixing.
– Half-fill tank → add product → agitate.
– Add other products if needed.
– Add Result® Spraying oil surfactant last.
– Maintain agitation throughout.
Tank Mixing: (Important nuance).
Can Mix With:
– Diflufenican (Difflan).
– Isoproturon (IPU) → improves Broadleaf Spectrum.
But:
– If targeting Grass Weeds, avoid mixing → reduces Grass control efficacy.
Key Limitations: (Best on).
– Small, actively growing Weeds.
Reduced Control On:
– Large Weeds.
– Stressed Weeds.
– Like all ALS Herbicides timing is everything.
Resistance Management: (CRITICAL).
– Group B = high resistance risk.
Label Guidance:
– Rotate with other modes of action.
– Use in mixes where appropriate.
– Avoid repeated solo use.
– Ryegrass resistance is a real risk in NZ systems.
Safety & Environmental:
– Causes eye irritation.
– Very toxic to aquatic life (long lasting).
– Toxic to soil organisms.
Key Precautions:
– Avoid spray drift (can damage crops nearby).
– Keep out of waterways.
– Use PPE.
– Simple way to think about itTristar = Broadleaf only,Sodio 50WG = Grass + Broadleaf (more complete Cereal option).
But:
– Comes with higher resistance pressure.
Bottom Line:
Sodio 50WG = versatile cereal Herbicide.
Strengths:
– Controls both Grasses and Broadleaf Weeds.
– Low use rate.
Weaknesses:
– Resistance risk (Group B).
– Needs oil + good timing.
Caution:
Must be used strictly according to label directions.
Available in 600g
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Registered under the ACVM Act: P009523
