Droplet velocity from broadcast agricultural nozzles as influenced by Pulse-width modulation

Thomas R. Butts, W. Clint Hoffmann, Joe D. Luck, Greg R. Kruger

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Scopus citations

Abstract

The recognition of agricultural pesticide application complexity has increased in recent years due to pesticide drift concerns and increasingly difficult-to-control pests. Spray application optimization is necessary to maximize pesticide efficacy while reducing environmental impact. Pulse-width modulation (PWM) spray application systems can be a vital precision agricultural tool by providing quick and accurate variable rate application changes and creating an opportunity for a site-specific pest management strategy. Research was conducted to identify the impact of PWM duty cycle, nozzle type, application pressure, and spray solution on spray droplet velocity to develop potential PWM optimization practices. Spray droplet velocity increased as pressure and duty cycle increased across nozzles. Greater variability in droplet velocities was observed across nozzles when pulsed at a 20 % duty cycle. Venturi nozzles created greater reductions in droplet velocity as duty cycle decreased and had greater variability in droplet velocity measurements than non-venturi nozzles. Based on present research, if PWM sprayers are to be used in site-specific pest management strategies, it is recommended that non-venturi nozzles coupled with greater than 40 % duty cycle be used to reduce spray droplet velocity variability, mitigate changes in drift potential, and assist pesticide applicators in optimizing site-specific pest management strategies.

Original languageEnglish (US)
Title of host publicationPesticide Formulation and Delivery Systems
Subtitle of host publication38th Volume, Innovative Application, Formulation, and Adjuvant Technologies
EditorsBradley K. Fritz, Thomas R. Butts
PublisherASTM International
Pages24-52
Number of pages29
ISBN (Electronic)9780803176652
DOIs
StatePublished - 2018
Event38th Symposium on Pesticide Formulation and Delivery Systems: Innovative Application, Formulation, and Adjuvant Technologies - New Orleans, United States
Duration: Oct 10 2017Oct 12 2017

Publication series

NameASTM Special Technical Publication
VolumeSTP 1610
ISSN (Print)0066-0558

Conference

Conference38th Symposium on Pesticide Formulation and Delivery Systems: Innovative Application, Formulation, and Adjuvant Technologies
Country/TerritoryUnited States
CityNew Orleans
Period10/10/1710/12/17

Keywords

  • Application parameters
  • Duty cycle
  • Non-venturi nozzle
  • Precision agriculture
  • Venturi nozzle

ASJC Scopus subject areas

  • Materials Science(all)

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