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Evaluation of smart spray technology for postemergence herbicide application in row middles of plasticulture production

Published online by Cambridge University Press:  26 July 2023

Ana C. Buzanini Open the ORCID record for Ana C. Buzanini [Opens in a new window] ,
Arnold Schumann Open the ORCID record for Arnold Schumann [Opens in a new window]  and
Nathan S. Boyd Open the ORCID record for Nathan S. Boyd [Opens in a new window]
Ana C. Buzanini
Affiliation:
Postdoctoral Research Associate, University of Florida, Gulf Coast Research and Education Center, Wimauma, FL, USA
Arnold Schumann
Affiliation:
Professor, University of Florida, Citrus Research and Education Center, Lake Alfred, FL, USA
Nathan S. Boyd*
Affiliation:
Professor, University of Florida, Gulf Coast Research and Education Center, Wimauma, FL, USA
*
Corresponding author: Nathan S. Boyd; Email: nsboyd@ufl.edu
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Abstract

Postemergence herbicides used to control weeds in the space between raised, plastic-covered beds in plasticulture production systems are typically banded, and herbicides are applied to weeds and to where weeds do not occur. To reduce the incidence of off-targeted applications, the University of Florida developed a smart-spray technology for row middles in plasticulture systems. The technology detects weed according to categories and applies herbicides only where the weeds occur. Field experiments were conducted at the Gulf Coast Research and Education Center in Balm, FL, in fall 2021 and spring 2022. The objective was to evaluate the efficacy of postemergence applications of diquat and glyphosate in row middles in jalapeno pepper fields when banded or applied with smart-spray technology. The overall precision of the weed detection model was 0.92 and 0.89 for fall and spring, respectively. The actuation precision achieved was 0.86 and 1 for fall and spring, respectively. No significant differences were observed between banded and targeted applications either with glyphosate or diquat in terms of broadleaf, grass, and nutsedge weed density. No significant pepper damage was observed with either herbicide or application technique. The smart-spray technology reduced herbicide application volume by 26% and 42% in fall and spring, respectively, with no reduction in weed control or pepper yield compared to a banded application. Overall, the smart-spray technology reduced the herbicide volume applied with no reductions in weed control and no significant effects on crop yield.

Keywords

Diquatglyphosatejalapeno pepperCapsicum annuum L.Herbicide volumeoff-target applicationsmart spray technologytargeted
Type
Research Article
Information
Weed Technology , Volume 37 , Issue 4 , August 2023 , pp. 336 - 342
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Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of the Weed Science Society of America

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Footnotes

Associate Editor: Robert Nurse, Agriculture and Agri-Food Canada

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