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Arboriculture & Urban Forestry

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Research ArticleArticles

Pesticide Application Techniques for Optimizing Efficiency

Franklin R. Hall
Arboriculture & Urban Forestry (AUF) April 1984, 10 (4) 104-107; DOI: https://doi.org/10.48044/jauf.1984.019
Franklin R. Hall
Professor, Department of Entomology and Head, Laboratory for Pest Control Application Technology, Ohio Agricultural Research and Development Center, The Ohio State University, Wooster, Ohio 44691
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  • Fig. 1.
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    Fig. 1.

    Interaction of many complex levels of activity are incorporated in the success or failure of the application process.

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    Fig. 2.

    A typical spray deposition efficiency analysis.

Tables

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    Table 1.

    Theoretical plant surface coverage obtained by sprayed 1 liter of spray evenly over 1 hectare with various sizes of droplets.

    Droplet diameterNumber of droplets/cm2
    1019099
    202387
    50153
    10019
    2002.4
    4000.298
    10000.019
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    Table 2.

    Variables affecting the amount of pesticide drift from hydraulic nozzles.

    1. Droplet size

    2. Droplet weight

    3. Spray pressure

    4. Evaporation rate

    5. Air movement

    6. Temperature and RH

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    Table 3.

    Tree heights and disc sizes1

    Approx, heightDiscNozzle psiMin. Pump GPM
    Up to 40-65’#14 or smaller350 to 40025
    50’ to 70’#16375 to 45035
    65’ to 110’#22375 to 45050
    • ↵1 All at a minimum of ¾” hose diameter.

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    Table 4.

    Disc capacity in GPM.

    Disc size400 psi500 psi
    1421.123.5
    1626.529.6
    1834.038.0
    2252.557.8
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Arboriculture & Urban Forestry (AUF)
Vol. 10, Issue 4
April 1984
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Pesticide Application Techniques for Optimizing Efficiency
Franklin R. Hall
Arboriculture & Urban Forestry (AUF) Apr 1984, 10 (4) 104-107; DOI: 10.48044/jauf.1984.019

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Pesticide Application Techniques for Optimizing Efficiency
Franklin R. Hall
Arboriculture & Urban Forestry (AUF) Apr 1984, 10 (4) 104-107; DOI: 10.48044/jauf.1984.019
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    • Abstract
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    • Targeting
    • What about coverage and drift?
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