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Comparing greenhouse sprayers: the dose-transfer process.

Timothy A Ebert1, Richard C Derksen, Roger A Downer

  • 1Laboratory For Pest Control Application Technology, Ohio Agricultural Research and Development Center, The Ohio State University, 1680 Madison Ave, Wooster, OH 44691, USA. ebert.39@osu.edu

Pest Management Science
|May 25, 2004
PubMed
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Different sprayers significantly impact pesticide retention and pest control efficacy on soybean plants. Constant volume application tests demonstrated that sprayer technology, not just volume, is crucial for effective pest management.

Area of Science:

  • Agricultural Engineering
  • Entomology
  • Plant Science

Background:

  • Effective pest management in agriculture relies on efficient pesticide application.
  • Sprayer technology and application volume can influence toxicant distribution and efficacy.
  • Soybean crops are susceptible to various insect pests and mites.

Purpose of the Study:

  • To evaluate the impact of three different sprayers on pesticide retention and efficacy.
  • To assess the influence of application volume versus sprayer type on pest control.
  • To determine the atomization characteristics of each sprayer.

Main Methods:

  • Evaluated a CO2-powered high-volume sprayer, a DRAMM coldfogger, and an Electrostatic Spraying Systems (ESS) sprayer.
  • Used spinosad and azadirachtin as active ingredients on greenhouse-grown soybeans.

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  • Assessed pest abundance (thrips, mites, aphids) and measured atomization using a PDPA 100-1D.

    • Main Results:

    • Both 'recommended volume' and 'constant volume' tests showed differences in toxicant retention between sprayers.
    • Only 'recommended volume' tests revealed significant effects of sprayers on pest abundance.
    • Constant volume tests confirmed that application equipment influences efficacy, independent of volume.

    Conclusions:

    • Sprayer technology plays a critical role in pesticide efficacy, interacting with application volume.
    • The dose-transfer process is significantly affected by the interplay between sprayer type and volume.
    • Optimizing sprayer selection is essential for maximizing pest control in soybean cultivation.