Simetryn 18% EC Herbicide | Selective Pre- & Post-Emergent Weed Control

Technical Specifications

Mode of Action

1. Dual Uptake Mechanism:
   • Root & Shoot Absorption: Taken up by roots of germinating seedlings and leaves of emerged weeds.
2. Photosynthetic Blockade:
   • Binds to the QB site of photosystem II, preventing electron transfer and disrupting ATP production.
3. Symptom Progression:
   • 3–5 days: Chlorosis in older leaves
   • 7–10 days: Widespread necrosis and plant death

Application Guide

Application Best Practices

• Water Volume: 200–400 L/ha for soil treatment; 150–300 L/ha for foliar application.
• Adjuvants: Add non-ionic surfactant (0.2% v/v) for post-emergent applications.
• Tank Mixes:
  • With metribuzin for enhanced broadleaf control in potatoes
  • With S-metolachlor for pre-emergent grass control in cotton
• Weather Conditions: Apply in cool mornings (15–25°C); avoid spraying before rain.

Key Advantages

1. Broad-Spectrum Efficacy:
   • Controls 30+ annual weeds, including resistant biotypes (e.g., triazine-tolerant pigweed).
2. Residual Soil Activity:
   • Provides 21–30 days of residual control, reducing re-application needs.
3. Crop Safety:
   • Selective in sugarcane, cotton, and potatoes when applied as directed.
4. Flexible Application:
   • Suits both pre-emergent (soil) and post-emergent (foliar) strategies.
5. Environmental Profile:
   • Low mammalian toxicity (LD₅₀ > 2000 mg/kg); soil half-life 14–28 days.

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).
• Environmental Fate:
  • Degrades via microbial action and photolysis; low leaching potential in clay soils.
• Storage: Store at 5–30°C, protected from sunlight and freezing.

Packaging & Compliance

• Standard Packs: 1L, 5L, 20L COEX containers
• Custom Solutions:
  • Private labeling with multilingual instructions
  • Regulatory support for global markets (EPA, EU, APAC)
• Shelf Life: 3 years under recommended conditions

FAQ

• Can Simetryn 18% EC control perennial weeds?
  Effective against annuals; use systemic herbicides (e.g., glyphosate) for perennials.
• What is the pre-harvest interval (PHI)?
  • Sugarcane: 60 days
  • Cotton: 45 days
  • Potatoes: 30 days
• Is it compatible with liquid fertilizers?
  Yes, but jar-test first; avoid mixing with high-N solutions.
• How to manage triazine-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

• Sugarcane Trials in Brazil:
  2.5 L/ha controlled 92% of crabgrass and pigweed, increasing cane yield by 15%.
• Cotton Trials in India:
  2.0 L/ha + S-metolachlor reduced weed density by 88%, improving cotton boll set.