The Importance of Particle Size Distribution in Pesticide Formulation
Particle size distribution plays a vital role in pesticide performance, influencing particle movement, surface energy, adhesion and biological activity. Manufacturers must control particle size throughout formulation development and production to deliver consistent, stable and effective products. Laser diffraction particle size analysis provides a reliable way to monitor these properties, helping manufacturers optimise formulations and maintain product quality.
Optimising Formulation Performance
Pesticide formulations, including emulsions, suspension concentrates, suspo-emulsions and wettable powders, rely on carefully controlled particle sizes. Particles that are too fine can reduce residual efficacy and increase susceptibility to photodegradation and volatilisation. Conversely, particles that are too coarse can reduce specific surface area and biological activity. Particle size distribution also affects dispersion, suspension stability, surface coverage and the overall effectiveness of the formulation. Manufacturers must therefore establish an appropriate particle size range for each product and maintain it throughout development and production.
Laser Diffraction for Process Control
Manufacturers can measure particle size using several techniques, including electrical sensing zone analysis, image analysis and light scattering. Laser diffraction offers several advantages, including rapid measurements, a wide measurement range, high sensitivity, good resolution and excellent reproducibility. These characteristics make it particularly useful for comparing formulations, evaluating ingredient concentrations and investigating the effects of production parameters on particle size distribution.
By measuring particle size at different stages of formulation development and production, manufacturers can identify variations, refine processing conditions and improve batch-to-batch consistency. The Chinese agricultural industry standard NY/T 2886-2016 also recommends laser diffraction particle size analysis, supporting its application in pesticide formulation processing.
This article explores how laser diffraction helps manufacturers optimise pesticide formulations, assess the impact of different ingredients and monitor production processes to support consistent product performance and stability.
