Metribuzin 70% WP Herbicide | Selective Weed Control for Soybeans, Potatoes, and Sugarcane

Technical Specifications

Mode of Action

1. Dual Uptake Mechanism:
   • Root & Foliar Absorption: Taken up by roots of germinating seedlings and leaves of emerged weeds.
2. Photosynthetic Disruption:
   • Blocks electron transport in photosystem II, preventing ATP and NADPH production, leading to chlorophyll degradation.
3. Symptom Progression:
   • 3–5 days: Yellowing (chlorosis) in older leaves
   • 7–10 days: Widespread necrosis and plant death

Application Guide

Application Best Practices

• Water Volume: 200–400 L/ha for ground application; ensure thorough mixing.
• Adjuvants: Add non-ionic surfactant (0.2% v/v) for post-emergent applications.
• Tank Mixes:
  • With S-metolachlor for pre-emergent grass control in soybeans
  • With glyphosate for non-selective fallow field treatment
• Weather Conditions: Apply in cool, dry weather (15–25°C); avoid spraying before rain.

Key Advantages

1. Broad-Spectrum Broadleaf Control:
   • Effective against 40+ annual broadleaf weeds; moderate control of grasses.
2. Residual Soil Activity:
   • Provides 2–4 weeks of residual control, reducing early-season weed pressure.
3. Crop Safety:
   • Selective in soybeans, potatoes, and sugarcane when applied as directed.
4. Flexible Application:
   • Suits pre-emergent (soil) and early post-emergent (foliar) strategies.
5. Low Mammalian Toxicity:
   • LD₅₀ > 2000 mg/kg (rat); minimal risk to non-target organisms.

Safety & Environmental Notes

• Toxicity:
  • Moderate toxicity to fish (LC₅₀ 1–10 mg/L); maintain 100 m buffer from water bodies.
  • Low toxicity to bees (LD₅₀ > 100 μg/bee).
• Crop Rotation Restrictions:
  • Avoid planting sensitive crops (e.g., crucifers, beets) within 12 months of application.
• Storage: Store in a cool, dry place (5–30°C), protected from moisture.

Packaging & Compliance

• Standard Packs: 1 kg, 5 kg, 25 kg HDPE bags
• Regulatory Support:
  • EPA, EU, and global registration dossiers available
• Shelf Life: 3 years under recommended conditions

FAQ

• Can Metribuzin 70% WP control perennial weeds?
  Primarily targets annuals; use systemic herbicides for perennials.
• What is the pre-harvest interval (PHI)?
  • Soybeans: 45 days
  • Potatoes: 30 days
  • Sugarcane: 60 days
• Is it compatible with liquid fertilizers?
  Yes, but jar-test first; avoid high-N solutions.
• How to manage triazinone-resistant weeds?
  Rotate with Group 15 (acetochlor) or Group 14 (fomesafen) herbicides.
• Can it be used in no-till systems?
  Yes, apply pre-emergent with sufficient soil moisture for activation.

Field Performance

• Soybean Trials in Argentina:
  700 g ai/ha + S-metolachlor controlled 90% of lambsquarters and crabgrass, increasing yield by 15%.
• Potato Trials in the US Pacific Northwest:
  1000 g ai/ha reduced weed density by 85%, improving tuber quality.

Residue Limits