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Kinetic Resolution of the Interactions between Agrochemical Products and Adjuvant Systems upon Mixing

Version 2 2024-06-03, 10:27
Version 1 2016-08-31, 12:12
journal contribution
posted on 2024-06-03, 10:27 authored by GR Webster, NB Bisset, David CahillDavid Cahill, P Jones, A Killick, A Hawley, BJ Boyd
The addition of an adjuvant to a pesticide usually occurs in a mix-tank, before spray application to the crop. Their interaction is potentially crucial to overall efficacy but has received little attention from a physical-chemical perspective. Study was undertaken by laser diffraction, Raman spectroscopy, and small-angle X-ray scattering to resolve these physical processes. It was shown that migration of the pesticide into the adjuvant droplet occurred in all cases studied. The level of transfer was dependent upon adjuvant level, adjuvant solubility, and surfactant level. For suspension pesticides, dissolution of crystallites within the droplet occurred to a degree limited by solubility. The results directly demonstrate the transfer of the pesticide into the adjuvant carrier. This indicates that for emulsion-based pesticides, application to the target is likely as a homogeneously mixed droplet, whereas for suspension pesticides, solubility may limit transfer and dissolution, leading to heterogeneity in the applied particles.

History

Journal

Journal of Agricultural and Food Chemistry

Volume

64

Pagination

6139-6147

Location

United States

ISSN

0021-8561

eISSN

1520-5118

Language

English

Publication classification

C Journal article, C1 Refereed article in a scholarly journal

Copyright notice

2016, American Chemical Society

Issue

31

Publisher

AMER CHEMICAL SOC