Effects on pesticide spray drift of the physicochemical properties of the spray liquid

Mieke De Schampheleire, David Nuyttens, Katrijn Baetens, Wim Cornelis, Donald Gabriels, Pieter Spanoghe

    Research output: Contribution to journalA1: Web of Science-article

    Abstract

    This research was on the effect of the physicochemical properties of the spray liquid on pesticide spray drift. Ten pesticide spray liquids with various physicochemical properties were selected for study. Some of these spray liquids were also examined with the addition of a polymer drift-retardant. In the first part, laboratory tests were performed to measure surface tension, viscosity, evaporation rate and density of the spray liquids. Subsequently, drift experiments were performed in a wind tunnel. From the results it was found that the dynamic surface tension is a major drift-determining factor, and also that the addition of a polymer drift-retardant can reduce drift significantly by increasing the viscosity. Drift reduction was found to be less effective with spray liquids of emulsifiable and suspendable formulation types than with spray liquids of water-dispersible granules and powders.
    Original languageEnglish
    JournalPrecision Agriculture
    Volume10
    Issue number5
    Pages (from-to)409-420
    Number of pages12
    ISSN1385-2256
    DOIs
    Publication statusPublished - 2009

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