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Accepted manuscript

Optimizing Weed Management in Chickpea Through Planting Date and Fall-Applied Residual Herbicides

Published online by Cambridge University Press:  07 April 2025

Akamjot Brar Open the ORCID record for Akamjot Brar [Opens in a new window] ,
Qasim A. Khan ,
Fabian Menalled Open the ORCID record for Fabian Menalled [Opens in a new window] ,
Zach Miller ,
Clint Beiermann Open the ORCID record for Clint Beiermann [Opens in a new window] ,
Kent McVay Open the ORCID record for Kent McVay [Opens in a new window]  and
Lovreet Shergill Open the ORCID record for Lovreet Shergill [Opens in a new window]
Akamjot Brar
Affiliation:
Graduate Research Assistant, Montana State University, Southern Agricultural Research Center, Montana State University, Bozeman, Montana, USA Research Associate, Department of Agricultural Biology, Colorado State University, Fort Collins, Colorado, USA
Qasim A. Khan
Affiliation:
Organic Cropping Systems Agronomist, North Dakota State University, Carrington Research Extension Center, Carrington, North Dakota, USA
Fabian Menalled
Affiliation:
Professor, Department of Land Resources & Environmental Sciences, Montana State University, Bozeman, Montana, USA
Zach Miller
Affiliation:
Associate Professor, Montana State University, Western Agricultural Research Center, Corvallis, Montana, USA
Clint Beiermann
Affiliation:
Assistant Professor, Department of Plant Sciences, University of Wyoming, Laramie, Wyoming, USA
Kent McVay
Affiliation:
Associate Professor, Montana State University, Southern Agricultural Research Center, Huntley, Montana, USA
Lovreet Shergill*
Affiliation:
Assistant Professor, Montana State University, Southern Agricultural Research Center, Huntley, MT, USA Assistant Professor, Department of Agricultural Biology, Colorado State University, Fort Collins, Colorado, USA
*
Author for correspondence: Lovreet Shergill; Email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

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Chickpea provides significant diversification benefits for semi-arid cropping systems. However, their slow emergence and open canopy growth habit make them poor competitors against rapidly growing weeds during the early season. In 2022 and 2023, field experiments were conducted at two sites, the Montana State University (MSU) Southern Agricultural Research Center, Huntley, MT, and the MSU Post Agronomy Farm, Bozeman, MT, to evaluate broadleaf weed management by integrating planting date and fall-applied soil-active herbicides in chickpea. Application of dimethenamid at 950 g ai ha-1 + pendimethalin at 1.68 kg ai ha-1, and carfentrazone + sulfentrazone at 238 g ai ha-1 resulted in better protection of yield against weeds and provided longer residual activity for control of kochia, redroot pigweed, and common mallow by reducing weed density to 10 - 20 plants m-2 compared to 50 - 70 plants m-2 in untreated check. Pyridate applied POST (700 g ai ha-1) was required in the above-mentioned treatments to eliminate escaped weeds. Early planting provided an additional biomass reduction compared to late planting due to the crop emergence before or around the same time as the weeds. There was no impact of planting date on weed density and grain yield in plots with dimethenamid + pendimethalin and carfentrazone + sulfentrazone, suggesting that these herbicides can extend the planting date window. These herbicide programs and early planting can be integrated with other weed management tactics for additional weed management options in chickpea.

Keywords

chickpeacrop injuryearly plantingfall applicationweed count
Type
Research Article
Information
Weed Technology , Accepted manuscript , pp. 1 - 24
Creative Commons
Creative Common License - CCCreative Common License - BYCreative Common License - NCCreative Common License - ND
This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives licence (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is unaltered and is properly cited. The written permission of Cambridge University Press must be obtained for commercial re-use or in order to create a derivative work.
Copyright
© The Author(s), 2025. Published by Cambridge University Press on behalf of Weed Science Society of America