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Measuring Spray Droplet Size from Agricultural Nozzles Using Laser Diffraction
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Spray drift mitigation using opposing synchronized air-blast sprayers.

Robert A Van Steenwyk1, Joel P Siegel2, Barat Bisabri3

  • 1Department of Environmental Science Policy and Management, University of California, Berkeley, CA, USA.

Pest Management Science
|September 19, 2020
PubMed
Summary
This summary is machine-generated.

A new Air-in spray technique significantly reduces pesticide drift by 53-99% in orchards. This method maintains or enhances pesticide coverage with minimal cost, benefiting US agriculture.

Keywords:
air-blast speed sprayeralmonddriftnavel orangewormpistachiospray coveragewalnut

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Area of Science:

  • Agricultural Engineering
  • Environmental Science
  • Agronomy

Background:

  • Pesticide drift poses a significant environmental and safety risk to US agriculture.
  • Current mitigation strategies are often cost-prohibitive or reduce pesticide efficacy, hindering adoption.
  • There is a need for effective and economical solutions to control pesticide drift.

Purpose of the Study:

  • To evaluate the efficacy of a novel spray technique, Air-in, in reducing pesticide drift.
  • To assess the impact of the Air-in technique on pesticide residue deposition and coverage.
  • To determine the cost-effectiveness and practical applicability of the Air-in technique for growers.

Main Methods:

  • Comparison of the Air-in spray technique against the standard grower method.
  • Measurement of pesticide drift at 7.6 m from the orchard drip line.
  • Quantification of pesticide residue deposition and coverage using air-blast speed sprayers.

Main Results:

  • The Air-in technique reduced pesticide drift by 53% to 99% compared to the grower standard.
  • Pesticide residue deposition increased by 0.7-2.6-fold with the Air-in technique.
  • Pesticide coverage improved by 1.0-1.4-fold, demonstrating enhanced efficacy.
  • The technique was effective across almond, walnut, and pistachio crops.

Conclusions:

  • The Air-in technique offers a promising solution for significantly reducing pesticide drift.
  • It effectively maintains or improves pesticide deposition and coverage, crucial for pest control.
  • The minimal cost associated with the Air-in technique makes it a viable option for widespread adoption in agriculture.