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Research Article

Assessment of Three Commercial Over-the-Row Sprayer Technologies in Eastern Washington Vineyards

Margaret L. McCoy, Gwen-Alyn Hoheisel, Lav R. Khot, Michelle M. Moyer
Am J Enol Vitic.  2021  : ajev.2021.20058  ; DOI: 10.5344/ajev.2021.20058
Margaret L. McCoy
1Department of Horticulture, Washington State University, Irrigated Agriculture Research and Extension Center, 24106 North Bunn Rd, Prosser, WA 99350;
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Gwen-Alyn Hoheisel
2WSU Extension, Washington State University, 1121 Dudley Avenue, Prosser, WA 99350;
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Lav R. Khot
3Department of Biological Systems Engineering, Washington State University, Irrigated Agriculture Research and Extension Center, 24106 North Bunn Rd, Prosser, WA 99350.
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Michelle M. Moyer
1Department of Horticulture, Washington State University, Irrigated Agriculture Research and Extension Center, 24106 North Bunn Rd, Prosser, WA 99350;
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  • For correspondence: michelle.moyer@wsu.edu
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Abstract

Washington wine grape growers are rapidly adopting vineyard management technologies such as mechanical pruners and harvesters but have been slower to adopt new chemical application technologies. Therefore, this study was aimed at generating technical information about commercial over-the-row sprayers deposition and drift, which could be used by growers during sprayer selection and optimization for different vineyard systems and wine grape canopies. Three commercial sprayer technologies, i.e. multi-fan heads, pneumatic, and electrostatic sprayer, were evaluated for their canopy deposition and drift in the 2016 and 2017 production seasons. Data were collected in Vitis vinifera ‘Chardonnay’ and ‘Riesling’ vineyards at two application timings, early season and mid-season, to determine sprayer deposition patterns in opposed and unopposed application spray row canopy and in-field aerial as well as ground drift. All sprayer technologies showed consistent in-canopy deposition and drift patterns at both application timings. Regardless of sprayer technology, the most deposition was in the upper canopy compared to the fruiting zone of the vines. Similarly, the most aerial and ground drift was in the row closest to the sprayed row, indicating that drift is relatively low with the three evaluated sprayer technologies.

  • air-assistance
  • over-the-row sprayer
  • spray deposition
  • spray drift
  • technology optimization
  • Received September 2020.
  • Revision received January 2021.
  • Accepted February 2021.
  • Published online March 2021

This is an open access article distributed under the CC BY license https://creativecommons.org/licenses/by-nc/4.0/).

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Open Access
Assessment of Three Commercial Over-the-Row Sprayer Technologies in Eastern Washington Vineyards
Margaret L. McCoy, Gwen-Alyn Hoheisel, Lav R. Khot, Michelle M. Moyer
Am J Enol Vitic.  2021  ajev.2021.20058  ; DOI: 10.5344/ajev.2021.20058
Margaret L. McCoy
1Department of Horticulture, Washington State University, Irrigated Agriculture Research and Extension Center, 24106 North Bunn Rd, Prosser, WA 99350;
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Gwen-Alyn Hoheisel
2WSU Extension, Washington State University, 1121 Dudley Avenue, Prosser, WA 99350;
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Lav R. Khot
3Department of Biological Systems Engineering, Washington State University, Irrigated Agriculture Research and Extension Center, 24106 North Bunn Rd, Prosser, WA 99350.
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Michelle M. Moyer
1Department of Horticulture, Washington State University, Irrigated Agriculture Research and Extension Center, 24106 North Bunn Rd, Prosser, WA 99350;
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • For correspondence: michelle.moyer@wsu.edu

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Assessment of Three Commercial Over-the-Row Sprayer Technologies in Eastern Washington Vineyards
Margaret L. McCoy, Gwen-Alyn Hoheisel, Lav R. Khot, Michelle M. Moyer
Am J Enol Vitic.  2021  ajev.2021.20058  ; DOI: 10.5344/ajev.2021.20058
Margaret L. McCoy
1Department of Horticulture, Washington State University, Irrigated Agriculture Research and Extension Center, 24106 North Bunn Rd, Prosser, WA 99350;
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Gwen-Alyn Hoheisel
2WSU Extension, Washington State University, 1121 Dudley Avenue, Prosser, WA 99350;
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Lav R. Khot
3Department of Biological Systems Engineering, Washington State University, Irrigated Agriculture Research and Extension Center, 24106 North Bunn Rd, Prosser, WA 99350.
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Michelle M. Moyer
1Department of Horticulture, Washington State University, Irrigated Agriculture Research and Extension Center, 24106 North Bunn Rd, Prosser, WA 99350;
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • For correspondence: michelle.moyer@wsu.edu
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