Metriphar 48SC 5L (Herbicide)

Metriphar is a selective herbicide for pre- and post-emergence weed control in Asparagus, Carrots, Lentils, Lucerne, Maize, Peas, Potatoes and Tomatoes.
Active ingredient:
480g/litre Metribuzin SC.
Key strength Gives both knockdown AND residual control.
Used in:
- Potatoes.
- Maize.
- Peas.
- Carrots.
- Tomatoes.
- Lucerne.
Mixing Rates per Tank (Real NZ Field Examples)
Rates vary by crop, but typical label ranges:
~0.7 – 1.2 L/ha (common range depending on crop & timing).
- Example: 200L tank.
Scenario A: 200 L/ha (1 tank = 1 ha).
Rate: 1.0 L/ha.
- Add 1.0 L per 200L tank.
Scenario B: 100 L/ha (tank covers 2 ha).
- Add 2.0 L per 200L tank.
Scenario C: Higher rate (heavy weeds / maize pre-emerge).
Rate: 1.2 L/ha.
- Add 1.2 L per 200L tank (200 L/ha).
- Example (from label – maize mix) 870 mL – 1.2 L/ha + alachlor.
- Shows:
Often used in tank mixes, not solo.
- Mixing Tips (Important).
- SC formulation → keep agitation on.
- Add early in tank mix.
Needs:
- Moisture for activation.
- Good soil coverage.
Best Alternatives / Rotation Partners.
- Metriphar = Group C1 (PSII) → same resistance group as Linuron.
- So don’t stack:
Linuron + Metribuzin repeatedly.
- Best Rotation Options.
- Group 15 (Residual backbone) S-metolachlor Alachlor.
- Strong partner (especially Maize).
- Group 27 (Broadleaf powerhouse) Mesotrione.
- Excellent on:
- Fathen.
- Nightshade.
Group 3 (Pre-emerge grass).
- Pendimethalin.
- Trifluralin.
Group 9 (Burn-down).
- Glyphosate.
- Before planting.
- Simple Program Example (Maize).
Pre-plant: Glyphosate.
Pre-emerge: Metribuzin + S-metolachlor.
Post: Mesotrione.
- Covers:
Grass + broadleaf + resistance.
Suitability by Crop. (Very Practical)
- Potatoes.
Excellent fit (one of the main uses).
Controls:
- Fathen.
- Nightshade.
Works Pre + early post.
- One of the core herbicides in Potatoes.
- Maize / Sweetcorn.
- Very useful.
Controls:
- Broadleaf weeds.
- Some grasses.
BUT Best in mixes (not strong enough alone).
- Carrots.
- Good but slightly harsher than linuron.
- Effective on small weeds.
Risk of crop damage if:
- Applied too early.
- Light soils.
- Lucerne.
Specialist use.
Good on:
- Poa.
- Only on established stands (>9 months).
- Peas / Lentils / Tomatoes.
Good selective option.
Works best:
- Pre-emerge.
Early post on small weeds.
Weed Spectrum (Where it shines)
Strong on:
- Fathen.
- Chickweed.
- Amaranthus.
- Shepherd’s Purse.
- Wireweed.
Weaker on:
- Large weeds (>4 leaf).
- Deep-rooted Perennials.
- Some grasses.
Safety & Use Risks.
- Harmful if swallowed.
- Skin/eye irritant.
- Very toxic to aquatic life.
Practical Risks.
- Spray drift can damage crops.
- Soil residual can affect following crops.
- Max 2 applications per year.
Key Practical Takeaways.
Strengths.
- Strong residual + knockdown combo.
Excellent in:
- Potatoes.
- Maize programs.
- Cost-effective.
Weaknesses.
- Same resistance group as linuron.
- Crop sensitivity (especially carrots).
- Needs moisture to activate.
- Metribuzin vs Linuron (Quick Insight).
Metribuzin:
- Stronger residual.
- Broader weed control.
- Slightly harsher on crops.
Linuron:
- Safer on crops.
- Slightly weaker spectrum.
- Many growers use:
- Both in rotation or combination.
- When to Use Metriphar.
- Pre-emerge with moisture forecast.
In potatoes or maize.
- When you want longer residual than linuron.
When to Be Careful.
- Light soils.
- Sensitive crops (Carrots).
- Dry conditions.
Caution:
Must be used strictly according to label directions.

Available in 5L

Metriphar Technical Guide 

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