METRIBUZIN

Pure product is white crystalline solid. m.p.125.5～126.5℃, vapor pressure <1.333×10-3Pa at 20℃, <2.666×10-2Pa at 60℃, relative density 1.28.   solubility in organic solvents: dichloromethane>100%, isopropylacetone 1%～10%, hexane 0.1%～1%. Methanol 450g/L, toluene 130g/L; solubility in water is 0.12%. Industrial m.p. 120～125℃.

Selective systemic conductive herbicide that can be used on soybeans, potatoes, tomatoes, alfalfa, peas, carrots, sugarcane, asparagus, pineapple, etc. to prevent and eliminate a wide range of broadleaf weeds and grass weeds.

Metribuzin is a selective, systemic herbicide used for controlling a broad spectrum of annual grasses and broadleaf weeds. It is commonly applied in crops such as potatoes, soybeans, tomatoes, and sugarcane. Known for its versatility, metribuzin can be used pre-emergence or post-emergence, depending on the crop and target weeds.

Key Features

1. Selective Herbicide: Effectively controls weeds while being safe for specific crops.

2. Broad Spectrum: Targets various annual grasses and broadleaf weeds.

3. Systemic Action: Absorbed by roots and leaves, translocating throughout the plant.

4. Flexible Application: Suitable for pre-emergence and post-emergence use.

Applications

Crops Treated

• Potatoes

• Soybeans

• Tomatoes

• Sugarcane

• Alfalfa

Weeds Controlled

• Annual Grasses:

  • Foxtails (Setaria spp.)

  • Crabgrass (Digitaria spp.)

  
  

• Broadleaf Weeds:

  • Pigweed (Amaranthus spp.)

  • Common Ragweed (Ambrosia artemisiifolia)

  • Lamb’s Quarters (Chenopodium album)

  • Velvetleaf (Abutilon theophrasti)

  • Morningglory (Ipomoea spp.)

  
  

Mechanism of Action

Metribuzin inhibits photosynthesis in susceptible plants by blocking the photosystem II pathway. This disruption prevents energy production, leading to chlorosis, growth inhibition, and eventual plant death. It is absorbed through the roots and foliage, making it effective for both soil and foliar applications.

Advantages

1. Broad-Spectrum Control: Effective against a wide range of weeds.

2. Crop Compatibility: Safe for use in key crops like potatoes and soybeans.

3. Residual Activity: Provides extended weed control, reducing competition.

4. Application Versatility: Can be used in pre-emergence or post-emergence stages.

Safety and Environmental Considerations

Handling and Storage

• Use personal protective equipment (PPE) during handling and application.

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

Environmental Impact

• Aquatic Safety: Avoid runoff into water bodies to protect aquatic organisms.

• Soil Mobility: Moderate mobility; follow label instructions to prevent leaching.

• Non-Target Plants: Avoid drift to neighboring crops or ornamental plants.

Regulatory Compliance

• Always follow local regulations and label recommendations.

Limitations

1. Resistance Management: Overuse may lead to herbicide-resistant weed populations.

2. Crop Sensitivity: Some crops may exhibit sensitivity under certain conditions.

3. Application Timing: Effectiveness depends on proper timing and weed stage.

Conclusion

Metribuzin is a versatile herbicide widely used for managing annual grasses and broadleaf weeds in various crops. Its systemic action, broad-spectrum control, and flexibility in application make it a valuable tool for weed management. Proper application timing and adherence to resistance management strategies are essential for maximizing its benefits.