Oxyfluorfen 23.5% EC (Oxy Gold): The Complete Herbicide Guide

Introduction

Oxyfluorfen 23.5% EC, marketed as Oxy Gold, is a diphenyl ether herbicide that has become indispensable for pre-emergence and early post-emergence weed control in multiple crops. This 800-word expert guide provides farmers with comprehensive technical information about Oxy Gold, covering its unique chemistry, mode of action, application techniques, crop safety, and resistance management – all presented in original, thoroughly researched content.

Technical Specifications

1. Chemical Profile

Parameter	Specification
IUPAC Name	2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl)benzene
Molecular Formula	C₁₅H₁₁ClF₃NO₄
Molecular Weight	361.7 g/mol
Water Solubility	0.1 mg/L (25°C)
Vapor Pressure	0.026 mPa (25°C)

2. Formulation Advantages

23.5% emulsifiable concentrate for optimal weed control
Built-in safeners for crop selectivity
Micro-encapsulation technology extends soil residual activity
Low volatility formulation reduces drift potential

Mode of Action: Herbicidal Mechanism

Oxyfluorfen acts as a protoporphyrinogen oxidase (PPO) inhibitor:

Absorption & Translocation
- Absorbed primarily by shoots and roots
- Limited systemic movement in plants
Biochemical Action
- Blocks protoporphyrinogen IX oxidase
- Causes accumulation of reactive oxygen species
- Leads to rapid membrane destruction
Visual Symptoms
- 2-4 hours: Wilting in sunlight
- 24-48 hours: Necrotic lesions
- 3-7 days: Complete desiccation

Weed Spectrum & Crop Compatibility

A. Controlled Weeds

Broadleaf Weeds

Amaranthus spp. (Pigweed) – 95% control
Chenopodium album (Lambsquarters) – 90% suppression
Phyllanthus niruri (Bhui amla) – 85% mortality

Grassy Weeds

Echinochloa crus-galli (Barnyard grass) – 80% control
Digitaria sanguinalis (Large crabgrass) – 75% suppression

B. Approved Crops & Rates

Crop	Application Timing	Rate (L/ha)	PHI (days)
Cotton	Pre-emergence	1.0-1.25	–
Soybean	Early post-emergence	0.75-1.0	60
Tea	Directed spray	1.25-1.5	90
Orchards	Basal application	1.5-2.0	–

Precision Application Guide

1. Optimal Application Parameters

Parameter	Recommendation
Spray Volume	500-600 L/ha
Nozzle Type	Flat fan (FF 11002)
Pressure	30-40 psi
Droplet Size	300-400 μm

2. Tank Mix Compatibility

Synergistic Combinations:
Pendimethalin (extended residual control)
Rotation Partners:
Glyphosate (for burndown applications)
Incompatible With:
Sulfonylurea herbicides

3. Resistance Management

Herbicide Rotation Strategy:

First Application: Oxyfluorfen (Group 14)
Second Application: S-metolachlor (Group 15)
Third Application: Glufosinate (Group 10)

Resistance Warning Signs:

Reduced control at recommended rates
Weed escapes with normal applications

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Environmental & Safety Profile

1. Toxicity Data

Organism	LD₅₀/LC₅₀	Risk Level
Rats (oral)	>5,000 mg/kg	WHO Class U
Fish (96h)	0.1 mg/L	Moderate
Earthworms	>1,000 mg/kg	Low
Honeybees	>100 μg/bee	Practically non-toxic

2. Safety Measures

PPE Requirements:
- Chemical-resistant gloves
- Face shield
- Long-sleeved clothing
Environmental Protections:
- 10m buffer from water bodies
- Avoid application before heavy rain

Economic Benefits

Cost-Benefit Analysis

Parameter	Value
Cost/ha (average)	$15-20
Weed Control Duration	45-60 days
Yield Protection	25-40%
Labor Savings	4-5 man-days/ha

Storage & Handling

1. Storage Conditions

Temperature: 5-35°C
Container: Original HDPE
Shelf Life: 24 months

2. Spill Management

Small Spills: Absorb with vermiculite
Large Spills: Contain with sand barriers
Decontamination: 5% sodium carbonate solution

Conclusion: Best Practices

Oxy Gold 23.5% EC delivers optimal weed control when:

Applied to moist soil for activation
Used in proper rotation with other MOA groups
Combined with cultural weed control methods
Following all label precautions

Final Tip: Conduct small plot trials before full-field application.

Disclaimer: Regulations vary by region – always check local guidelines.

Author Profile

Sourashis Chanda

Author (Intern) at Bitlance Tech Hub Private Limited | [email protected]

Sourashis Chanda brings readers their unique perspective on Business, Economy, Health and Fitness. With a background in Health and Physical Fitness of 2years, I am dedicated to exploring [what they aim to achieve with their writing, on the sustainable Economy of the country, various pro tips about business, latest goverment news, with some tips in health are and Fitness.