Oxadiazon

The original drug is colorless, odorless and non-absorbent cry stal,

melting point 87℃ , non-volatile at room temperature, vapor

pressure <0.13mPa(20℃ ). Solubility (20℃ ): 1.0mg/L in water, 100g/L

in methanol and ethanol, 200g/L in cyclohexane, 600g/L in acetone,

1000g/L in benzene, toluene and chloroform. stable under usual

storage conditions, non-corrosive, decomposes in alkaline solution.

It is mainly used for weed control in water fields, but also effective in dry fields such as peanut, cotton and sugar cane.

Oxadiazon is a pre-emergent and early post-emergent herbicide widely used to control annual grasses and broadleaf weeds in turfgrass, ornamental plants, and non-crop areas. It belongs to the oxadiazole chemical class and works by inhibiting the production of essential enzymes required for weed growth. Oxadiazon is known for its long-lasting residual activity, making it a preferred choice for professional turf and landscape management.

Key Features

1. Pre- and Early Post-Emergent Control: Effective against germinating and newly emerged weeds.

2. Broad-Spectrum Activity: Targets a wide range of grasses and broadleaf weeds.

3. Long Residual Effect: Provides extended protection against weeds for weeks after application.

4. Safe for Ornamentals: Excellent selectivity when used in landscapes and nurseries.

Applications

Uses

• Turfgrass Management: Golf courses, sports fields, and lawns.

• Ornamental Plants: Nurseries and landscaped areas.

• Non-Crop Areas: Industrial sites, roadsides, and utility rights-of-way.

Weeds Controlled

• Crabgrass (Digitaria spp.)

• Goosegrass (Eleusine indica)

• Purslane (Portulaca oleracea)

• Chickweed (Stellaria media)

• Annual Bluegrass (Poa annua)

Mechanism of Action

Oxadiazon inhibits protoporphyrinogen oxidase (PPO), an enzyme crucial for chlorophyll production. This disruption leads to the accumulation of toxic intermediates in weed cells, causing membrane damage and eventual death.

Advantages

1. Effective Weed Control: Eliminates a broad spectrum of weeds during germination and early growth.

2. Durable Residual Activity: Reduces the need for frequent reapplications.

3. Turf and Ornamental Safety: Selective action ensures minimal damage to desired plants.

4. Weather-Resistant: Maintains efficacy under various environmental conditions.

Safety and Environmental Considerations

Handling and Storage

• Wear appropriate personal protective equipment (PPE) such as gloves, goggles, and respirators during application.

• Store in a cool, dry place, away from food, feed, and water sources.

Environmental Impact

• Soil Stability: Tends to bind to soil particles, reducing leaching potential.

• Aquatic Toxicity: Avoid runoff into water bodies to protect aquatic ecosystems.

• Non-Target Safety: Generally safe for beneficial insects and non-target plants when used as directed.

Regulatory Compliance

• Follow local regulations and label instructions for application and disposal.

Limitations

• No Post-Emergent Action: Ineffective against established weeds.

• Application Timing: Requires precise timing for optimal pre-emergent control.

• Resistance Risk: Overuse may lead to resistance in certain weed populations.

Conclusion

Oxadiazon is a reliable herbicide for pre-emergent and early post-emergent weed control in turf, ornamentals, and non-crop areas. Its broad-spectrum activity, long residual effect, and selective action make it an essential tool for professional weed management. Proper application and adherence to safety guidelines are crucial for achieving the best results while minimizing environmental risks.