Cyhalofop-Butyl Herbicide | Selective Post-Emergence Grass Control

Technical Specifications

• Active Ingredient: Cyhalofop butyl (CAS No. 122008-85-9)
• Molecular Formula: C₂₄H₂₄ClF₃NO₄
• Mode of Action: Inhibits ACCase, blocking fatty acid synthesis in grassy weeds.
• Formulations:
  • 10% EC (Emulsifiable Concentrate)
  • 15% EC
  • 20% EC
• Target Crops: Rice (paddy and upland), wheat, barley.
• Target Weeds:
  • Annual Grasses: Barnyardgrass, crabgrass, foxtail, junglerice.
  • Perennial Grasses: Bermudagrass, quackgrass (with repeated applications).

Mode of Action

1. Systemic Uptake: Absorbed by weed leaves and roots, translocating to meristematic tissues (growing points).
2. ACCase Inhibition: Blocks acetyl-CoA carboxylase, halting fatty acid production.
3. Lipid Depletion: Weakens cell membranes, causing chlorosis, stunting, and necrosis.
4. Symptom Timeline:
   • Initial: Yellowing of leaf tips (5–7 days).
   • Progression: Browning spreads to entire leaf (10–14 days).
   • Death: Complete necrosis within 2–3 weeks.

Application Guide

Application Tips:

• Water Management: Maintain 3–5 cm water depth in rice paddies for 5–7 days post-application.
• Mixing: Dilute in 300–500 L water/ha; add non-ionic surfactant for better adhesion.
• Timing: Apply in cool (15–25°C) conditions; avoid spraying during drought or extreme heat.

Key Advantages

1. Selective Efficacy: Controls 20+ grassy weeds while sparing rice and broadleaf crops.
2. Rapid Action: Visible symptoms within 5 days; complete kill in 2–3 weeks.
3. Flood Tolerance: Remains active in flooded rice fields, unlike many herbicides.
4. Low Residue: Degrades quickly (half-life: 5–10 days), minimizing rotational crop restrictions.
5. Tank Mix Compatibility:
   • Common Mixes: Bensulfuron-methyl, pyrazosulfuron-ethyl (broadens spectrum to include sedges and broadleaf weeds).

Safety & Environmental Notes

• Toxicity: Low mammalian toxicity (LD₅₀ > 2000 mg/kg); toxic to aquatic organisms (avoid water runoff).
• Environmental Impact:
  • Low volatility; minimal risk to non-target plants.
  • Degrades via photolysis and microbial action.
• Storage: Store in cool, dry place; protect from freezing.

Resistance Management

• HRAC Group: 1 (ACCase inhibitors).
• Strategies:
  • Rotate with Group 2 (ALS inhibitors), Group 14 (PPO inhibitors), or Group 27 (HPPD inhibitors).
  • Avoid consecutive annual use on ACCase-resistant weeds (e.g., barnyardgrass).

FAQ

1. Can Cyhalofop butyl be used in direct-seeded rice?
   Yes, at 75–100 g a.i./ha when rice is at 3–4 leaf stage and weeds are 2–3 leaf stage.
2. How does it affect aquatic life?
   Highly toxic to fish and algae; avoid application near water bodies or drainage systems.
3. What is the re-entry interval (REI)?
   12 hours for hand weeding; 24 hours for mechanical operations.
4. Can it control perennial grasses?
   Partial control of bermudagrass; best used in combination with other herbicides.
5. Is it safe for rotational crops?
   Yes, with normal intervals (1–2 months); consult label for specific crops.

Packaging & OEM Services

• Standard Packaging:
  • 1L, 5L, 10L HDPE containers.
  • 20L drums for bulk orders.
• Custom Solutions:
  • Private labeling with multilingual artwork.
  • Regulatory support for global markets.
  • Custom formulations (e.g., Cyhalofop butyl + bensulfuron-methyl blends).

Why Choose Cyhalofop Butyl?

• Rice-Specific Safety: Engineered for compatibility with flooded rice ecosystems.
• Efficiency: Low dosage requirements reduce application costs.
• Technical Support: Expert guidance on water management and tank mix strategies.