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    Development of Drop Size-Frequency Analysis of Sprays Used for Pesticide Application

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    The development of automated spray drop analyzers has moved from early types using automation only to scan photographic negatives of drops caught on a solid or liquid substrate to in situ type devices capable of sampling a spray cloud in the air. The ruby laser has added the latest development, providing for broad drop size spectrum analysis with both imaging and light scatter techniques. Data taken with a ruby laser instrument with selected pesticide spray atomizers indicate the effects on drop size of (1) increasing atomizer throughput, which increases drop size, and (2) varying angle of spray discharge to airstream for fan and hollow cone type sprays. Increasing the spray angle decreases the drop size. Data on a rotary atomizer at one peripheral velocity and one throughput are also shown.


    automatic spray drop scanning, spray drop analyzers, drop size distribution, fan and cone nozzles, agricultural sprays

    Author Information:

    Akesson, NB
    Professor, University of California, Davis, CA

    Yates, WE
    Professor, University of California, Davis, CA

    Committee/Subcommittee: E35.22

    DOI: 10.1520/STP18361S