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Insecticide formulations based on nicotine oleate stabilized by sodium caseinate.

Herley Casanova1, Carlos Ortiz, Carlos Peláez

  • 1Grupo de Coloides and Grupo Interdisciplinario de Estudios Moleculares, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, A.A. 1226, Medellín, Colombia. casanova@matematicas.udea.edu.co

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|October 17, 2002
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Summary
This summary is machine-generated.

New botanical insecticide formulations using nicotine oleate show promise for organic farming. These stable emulsions and suspo-emulsions offer effective pest control with desirable physical properties for agricultural applications.

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Area of Science:

  • Agricultural Science
  • Chemistry
  • Entomology

Background:

  • Growing demand for organic farming practices necessitates safer crop protection methods.
  • Botanical insecticides, like nicotine, present a viable alternative to synthetic pesticides.
  • Developing stable and effective formulations is crucial for the commercial viability of botanical insecticides.

Purpose of the Study:

  • To formulate and characterize nicotine-based botanical insecticides.
  • To investigate the effect of nicotine oleate concentration on formulation properties and bioactivity.
  • To identify optimal formulations for effective and stable insecticide applications.

Main Methods:

  • Formulation of nicotine as a dispersion stabilized by sodium caseinate.
  • Characterization of phase transitions (emulsion, suspo-emulsion, suspension) based on nicotine oleate concentration.
  • Evaluation of biological activity, viscosity, dispersion time, and protein surface coverage.
  • Assessment of creaming and microbiological stability over 4 months.

Main Results:

  • Nicotine oleate formulations exhibited distinct phase transitions at specific concentrations.
  • Formulation properties such as viscosity and dispersion time were concentration-dependent.
  • An 8.2 wt % nicotine oleate emulsion and an 8.7 wt % suspo-emulsion demonstrated optimal bioactivity and physical characteristics.
  • Formulations maintained stability for at least 4 months without loss of efficacy.

Conclusions:

  • Nicotine oleate formulations offer a promising avenue for developing effective botanical insecticides.
  • Optimized emulsion and suspo-emulsion formulations provide a balance of bioactivity and desirable physical properties.
  • These formulations exhibit good stability, supporting their potential use in sustainable agriculture.