STP1470

    Nozzle Formulation Interactions: Consequences for Spray Droplet Adhesion to Plant Surfaces

    Published: Jan 2006


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    Abstract

    Tests were conducted with a widely used herbicide (glyphosate) that is available in a range of formulations and a selection of commonly used nozzle types [XR TeeJet, extended range flat spray tip (XR), Turbo TeeJet, wide angle flat spray tip (TT), AI TeeJet, Air Induction spray tip (AI)] and determined the rebound characteristics of each combination using a difficult-to-wet foliar crop target (cabbage), an easy-to-wet hairy weed (velvetleaf), and a difficult-to-wet weed (lambsquarters). The rebound was determined under standard spraying conditions in a track room using a “bounce chamber” constructed at The Laboratory for Pest Control Application Technology (LPCAT). The amount of spray liquid retained and reflected from the leaf surfaces was determined by weight. The data showed that there were no significant differences between the nozzles, but that formulation differences did occur and were a reflection of surfactant level in the spray mixture. There was a significant formulation X leaf interaction and leaf X nozzle interaction, but not a formulation X nozzle interaction.

    Keywords:

    droplet rebound, bounce chamber, surfactant, glyphosate, leaf surface


    Author Information:

    Downer, RA
    Research Scientist, Research Associate, and Research Assistant, Laboratory for Pest Control Application Technology, The Ohio State University, Wooster, OH

    Hacker, JK
    Research Scientist, Research Associate, and Research Assistant, Laboratory for Pest Control Application Technology, The Ohio State University, Wooster, OH

    Ebert, RS
    Research Scientist, Research Associate, and Research Assistant, Laboratory for Pest Control Application Technology, The Ohio State University, Wooster, OH


    Paper ID: STP37475S

    Committee/Subcommittee: E35.22

    DOI: 10.1520/STP37475S


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