Volume 4, Issue 8 (September 2007)

    The Effect of Polymeric, Ammonium Sulfate-Based Adjuvants on the Deposition of Glyphosate Spray Solutions

    (Received 29 June 2007; accepted 30 July 2007)

    Published Online: 2007

    CODEN: JAIOAD

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    Abstract

    High molecular weight polymers have been shown to improve the efficacy of systemic herbicides such as glyphosate. The mode of activity of these polymeric adjuvants is not well understood. In this study a commercial polymer/ammonium sulfate (AMS)-based adjuvant was tested with commercial glyphosate formulations. The effect of the various treatments on the mass of spray deposited, droplet bounce, and droplet run-off was determined. The polymeric/AMS adjuvant was found to improve the deposition of the commercial glyphosate formulations in that: the loss of active due to spray drift was reduced, i.e., the mass of spray deposited was increased; droplet bounce of the spray solutions was reduced, i.e., droplet retention was improved; the polymeric/AMS adjuvant did not significantly affect the angle at which droplets were detached from leaves, therefore the adjuvant should not affect droplet run-off.


    Author Information:

    Rose, Simon A. H.
    Research Manager, Ciba Specialty Chemicals PLC, Bradford,

    Lyons, Lynn
    Ciba Specialty Chemicals PLC, Bradford,

    Whitehead, Mark
    Ciba Specialty Chemicals PLC, Bradford,


    Stock #: JAI101332

    ISSN: 1546-962X

    DOI: 10.1520/JAI101332

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    Author
    Title The Effect of Polymeric, Ammonium Sulfate-Based Adjuvants on the Deposition of Glyphosate Spray Solutions
    Symposium Pesticide Formulations and Delivery Systems: 26th Volume, 2005-10-20
    Committee E35