What is the Difference Between Butachlor and Pretilachlor?

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Butachlor and pretilachlor are both herbicides used to control weeds, but they belong to different classes and have distinct characteristics:

  • Class: Butachlor is an acetanilide herbicide, while pretilachlor is an anilide herbicide.
  • Chemical Formula: The chemical formula of butachlor is C17H26ClNO2, and for pretilachlor, it is C17H26ClNO2.
  • Formulation: Butachlor is marketed as a 50% emulsifiable concentrate formulation, while pretilachlor is marketed as a 50% emulsifiable concentrate formulation.
  • Selectivity: Butachlor is a selective systemic herbicide, while pretilachlor is a broad-spectrum systemic herbicide.

Both herbicides work in a similar way, as they interfere with the growth of weeds. However, due to their differences in class and selectivity, they may have varying effects on different weed species and may be used in different contexts or applications.

Comparative Table: Butachlor vs Pretilachlor

Butachlor and Pretilachlor are both herbicides that belong to the acetanilide class, but they have some differences in their properties and usage. Here is a table comparing the two:

Property/Usage Butachlor Pretilachlor
Chemical Class Acetanilide Anilide
Formula C17H26ClNO2 C17H26ClNO2
Molar Mass 311.85 g/mol 311.85 g/mol
Density 1.0695 g/cm³ -
Solubility Poor 50 mg/l
Formulation Emulsifiable concentrate 50% emulsifiable concentrate
Application Selective pre-emergent herbicide Broad-spectrum systemic herbicide
Usage in India Extensively used in the form of granules in rice -

Both herbicides are used for controlling weeds in agriculture, but Butachlor is more commonly used in India for rice cultivation, while Pretilachlor is marketed as a 50% emulsifiable concentrate formulation.