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Blueberry and blackberry are tolerant to repeated indaziflam applications

Published online by Cambridge University Press:  19 February 2021

Timothy L. Grey Open the ORCID record for Timothy L. Grey [Opens in a new window] ,
Nicholas L. Hurdle ,
Keith Rucker  and
Nicholas T. Basinger Open the ORCID record for Nicholas T. Basinger [Opens in a new window]
Timothy L. Grey*
Affiliation:
Professor, Department of Crop and Soil Sciences, College of Agriculture and Environmental Sciences, University of Georgia, Tifton, GA, USA
Nicholas L. Hurdle
Affiliation:
Graduate Research Associate, Department of Crop and Soil Sciences, College of Agriculture and Environmental Sciences, University of Georgia, Tifton, GA, USA
Keith Rucker
Affiliation:
Technical Service Specialist, Bayer Crop Science, Tifton, GA, USA
Nicholas T. Basinger
Affiliation:
Assistant Professor, Department of Crop and Soil Sciences, College of Agriculture and Environmental Sciences, University of Georgia, Athens, GA, USA
*
Author for correspondence: Timothy L. Grey, Department of Crop and Soil Sciences, College of Agriculture and Environmental Sciences, University of Georgia, 2360 Rainwater Rd., Tifton, GA 31793 Email: tgrey@uga.edu
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Abstract

Numerous perennial horticultural crops are grown across the southeastern United States. Blueberry and blackberry (also known as caneberry) are commonly found in roadside stands, promote agritourism via pick-your-own markets, are important for fresh market commercial production in the region, and when processed, provide desirable value added products. Season-long weed control using residual herbicides is crucial for these perennial fruit crops to maximize berry quality and yield. Studies performed from 2012 to 2014 in Lanier and Clinch counties in Georgia evaluated the effects of repeated applications of indaziflam at 35, 75, or 145 g ai ha−1 applied biannually in March and September (five total applications) on growth of ‘Alapaha’ rabbiteye and ‘Palmetto’ highbush blueberry, and ‘Apache’ thornless blackberry. All indaziflam treatments were mixed with glufosinate, and a glufosinate-only treatment was included as a check. Minor leaf chlorosis (<10%) was noted within 30 d after application for all blueberries for all treatments, but this was always transient. Blueberry stem diameter was not different for any treatment, even when indaziflam was applied up to 725 g ai ha−1 over 3 yr as compared to glufosinate alone. There was no chlorosis or stem diameter differences for blackberry noted for any treatment. Indaziflam applied in blueberry and blackberry production provides season-long control of numerous troublesome weed species, without causing injury or negatively impacting crop growth.

Keywords

indaziflamglufosinateblueberryVaccinium spp.blackberryRubus spp.fruit productionchlorosisresidual
Type
Research Article
Information
Weed Technology , Volume 35 , Issue 4 , August 2021 , pp. 560 - 564
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of the Weed Science Society of America

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Footnotes

Associate Editor: Darren Robinson, University of Guelph

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