Nicosulfuron Herbicide | Selective Post-Emergence Weed Control for Corn

Technical Specifications

• Active Ingredient: Nicosulfuron
• CAS Number: 111991-09-4
• Molecular Formula: C₁₈H₁₉N₄O₆S
• Mode of Action: Inhibits ALS (acetolactate synthase), blocking leucine, isoleucine, and valine synthesis in weeds.
• Formulations:
  • 4% WP (Wettable Powder)
  • 4% OD
  • 25% SC (Suspension Concentrate)
  • 75% WDG
• Target Crops: Corn (maize), sweet corn, popcorn
• Target Weeds:
  • Broadleaf: Lamb’s-quarters, pigweed, amaranth, velvetleaf
  • Grassy: Foxtail, crabgrass, barnyardgrass
  • Annuals: Green foxtail, barnyard grass

Mode of Action & Efficacy

1. Systemic Translocation: Absorbed by weed leaves and roots, moving to meristematic tissues (growing points).
2. Amino Acid Blockade: Inhibits ALS, preventing biosynthesis of essential amino acids → stunted growth, chlorosis, and necrosis.
3. Speed of Action: Visible symptoms (yellowing, growth arrest) within 3–7 days; complete weed death in 10–14 days.
4. Residual Activity: 3–4 weeks in soil, controlling late-emerging weeds.

Application Guide

Application Tips:

• Mixing: Dilute in 200–300 L water/ha; add non-ionic surfactant for better adhesion.
• Timing: Apply in cool mornings/late afternoons; avoid spraying during drought or heat stress.
• Crop Safety: Safe for corn when used at recommended rates; avoid overlap with sensitive crops (e.g., crucifers, beets).

Key Advantages

1. Selective Efficacy: Controls 30+ weed species while sparing corn.
2. Low Dosage: 20–100 g a.i./ha, reducing chemical input costs.
3. Residue Management: Degrades via microbial action (half-life: 10–14 days), suitable for rotational cropping.
4. Tank Mix Compatibility:
   • Common Mixes: Atrazine, acetochlor, metribuzin (broadens spectrum).
   • Synergy: Enhances control of resistant weeds (e.g., ALS-resistant amaranth).

Safety & Environmental Notes

• Toxicity: Low mammalian toxicity (LD₅₀ > 2000 mg/kg); wear gloves/goggles during handling.
• Environmental Impact:
  • Low volatility; minimal risk to non-target plants.
  • Toxic to aquatic life; keep 100m from water bodies.
• Storage: Cool, dry place; separate from food/feed.

Resistance Management

• IRAC Group: 2 (ALS inhibitors).
• Strategies:
  • Rotate with Group 15 (acetochlor), Group 14 (fomesafen), or Group 9 (glyphosate).
  • Avoid consecutive annual use; implement cultural practices (crop rotation, tillage).

FAQ

1. Can Nicosulfuron be used on sweet corn?
   Yes, at 20–30 g a.i./ha in early post-emergence (weed 2–4 leaf stage).
2. How does Nicosulfuron affect next-season crops?
   With a 10–14 day half-life, it is safe for most rotational crops (e.g., soybeans, wheat).
3. Is Nicosulfuron effective against glyphosate-resistant weeds?
   Yes, as it targets a different mode of action (ALS inhibition).
4. Can it be mixed with atrazine?
   Yes; tank mixing with atrazine enhances broadleaf control and residual activity.
5. What is the pre-harvest interval (PHI)?
   PHI is 7–10 days for corn, ensuring residue compliance with food safety standards.

Packaging & OEM Services

• Standard Packaging:
  • 100g, 500g, 1kg bags (WP/DF)
  • 1L, 5L, 20L containers (SC)
• Custom Solutions:
  • Private labeling with multilingual labels
  • Regulatory support (COA, SDS, field trial data)
  • Custom formulations (e.g., Nicosulfuron + atrazine blends)

Why Choose Nicosulfuron?

• Large-scale corn producers
• No-till and conservation farming systems
• Resistance management programs
• Export-oriented corn production (meets global MRL standards)