Bensulfuron-Methyl (Patented-No-Supply)

Pure product is white odorless solid, m.p. 185 ～ 188℃ , vapor pressure 1.733×10-3Pa(20℃). Solubility: dichloromethane 11720mg/L, acetonitrile 5380mg/L, xylene 280mg/L, ethyl acetate 1660mg/L, acetone 1380mg/L, methanol 990mg/L, hexane 3.1mg/L, water 1200mg/L. Distribution coeffi cient is 4.1. Stable in slightly basic (pH=8) aqueous solution, slow decomposition in acidic solution. The half-life is 11d at pH 5 and 143d at pH 7. The original drug is slightly light yellow.

Used to control annual and perennial broad-leaved weeds and sedges in rice seedling fields, direct seeding fields and transplanting fields

Bensulfuron-Methyl is a selective herbicide from the sulfonylurea family, primarily used for controlling broadleaf weeds and sedges in paddy fields. It is applied as a post-emergent herbicide and is effective at low doses, offering precise weed control while being safe for rice crops.

Key Features

1. Selective Action: Targets specific weeds without harming rice crops.

2. Low Dose Efficiency: Effective at minimal application rates, reducing environmental impact.

3. Systemic Herbicide: Absorbed by leaves and roots, translocating throughout the weed.

4. Paddy Field Specialty: Designed for use in wetland conditions.

Applications

Crops Treated

• Rice (Paddy Fields)

Weeds Controlled

• Broadleaf Weeds:

  • Duckweed (Lemna spp.)

  • Water Hyacinth (Eichhornia crassipes)

  
  

• Sedges:

  • Purple Nutsedge (Cyperus rotundus)

  • Yellow Nutsedge (Cyperus esculentus)

  
  

Mechanism of Action

Bensulfuron-methyl inhibits acetolactate synthase (ALS), an enzyme critical for the synthesis of essential amino acids in plants. This disruption halts weed growth and leads to their death, while rice plants remain unaffected due to their metabolic resistance.

Advantages

1. High Crop Safety: Selective for rice crops, ensuring minimal crop damage.

2. Reduced Weed Competition: Enhances rice yield by effectively eliminating competing weeds.

3. Environmentally Friendly: Low toxicity to non-target organisms when used as directed.

4. Integrated Use: Fits well into paddy weed management programs.

Safety and Environmental Considerations

Handling and Storage

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

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

Environmental Impact

• Aquatic Safety: Avoid excessive application to prevent runoff into water bodies.

• Soil Persistence: Breaks down relatively quickly under flooded conditions, minimizing residue.

Regulatory Compliance

• Follow local regulations and label instructions for safe application.

Limitations

• Patented Product: May not be freely available for supply due to patent restrictions.

• Resistance Risk: Overuse may lead to ALS-resistant weed populations.

• Narrow Spectrum: Primarily effective against broadleaf weeds and sedges; not effective on grasses.

Conclusion

Bensulfuron-methyl is a reliable herbicide for paddy field weed management, offering effective control of broadleaf weeds and sedges. Its selectivity, low-dose efficiency, and compatibility with rice cultivation make it a valuable tool for farmers. To maintain its efficacy, proper application practices and adherence to regulations are essential.