How Oxyfluorfen TC Provides Effective Pre- and Post-Emergence Weed Control

Introduction

Oxyfluorfen TC (Technical Concentrate) is a contact herbicide widely used in agricultural and horticultural practices. It is known for its broad-spectrum control of annual broadleaf and grassy weeds, offering both pre- and early post-emergence activity to maintain clean fields and orchards.

Product Information

• Name: Oxyfluorfen TC

• Chemical Name: 2-chloro-α,α,α-trifluoro-p-tolyl 3-ethoxy-4-nitrophenyl ether

• CAS Number: 42874-03-3

• Appearance: Dark brown to amber liquid

• Purity (TC): ≥ 95%

• Formulations: EC (Emulsifiable Concentrate), SC (Suspension Concentrate)

Key Features

• Broad-spectrum activity against weeds

• Pre- and post-emergence application flexibility

• ⚡ Contact action leading to rapid weed desiccation

• Residual soil activity for extended weed control

• Low volatility, minimizing drift and off-target damage

Applications

Oxyfluorfen inhibits protoporphyrinogen oxidase (PPO), an enzyme involved in chlorophyll synthesis. This causes cell membrane disruption, resulting in rapid leaf necrosis in susceptible weeds.

Advantages

• Long-lasting residual weed control

• Effective on hard-to-control broadleaf weeds

• Can be applied before or after crop emergence

• Reduces reliance on mechanical weeding

Limitations

• Strict crop selectivity required to avoid phytotoxicity

• Works best on small or germinating weeds

• Requires even spray coverage for optimal efficacy

FAQs

Q: Can Oxyfluorfen TC be used in no-till farming?
A: Yes, it is effective in no-till systems when applied pre-emergence.

Q: Is it safe for perennial crops like orchards?
A: Yes, when used as a directed spray to avoid contact with foliage.

Q: How long does it persist in soil?
A: It has moderate persistence, typically 2–4 months depending on soil and climate.

Conclusion

Oxyfluorfen TC offers growers a reliable, dual-action herbicide for pre- and post-emergence weed control. Its residual effect, broad spectrum, and low volatility make it ideal for integrated weed management in both row crops and perennial systems.