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Emerging Challenges for Weed Management in Herbicide-Resistant Crops

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  • Karla L. Gage

    (Department of Plant Soils and Agricultural Systems, Southern Illinois University, Carbondale, IL 62901-6509, USA
    Department of Plant Biology, Southern Illinois University Carbondale, Carbondale, IL 62901-6509, USA)

  • Ronald F. Krausz

    (Department of Plant Soils and Agricultural Systems, Southern Illinois University, Carbondale, IL 62901-6509, USA)

  • S. Alan Walters

    (Department of Plant Soils and Agricultural Systems, Southern Illinois University, Carbondale, IL 62901-6509, USA)

Abstract

Since weed management is such a critical component of agronomic crop production systems, herbicides are widely used to provide weed control to ensure that yields are maximized. In the last few years, herbicide-resistant (HR) crops, particularly those that are glyphosate-resistant, and more recently, those with dicamba (3,6-dichloro-2-methoxybenzoic acid) and 2,4-D (2,4-dichlorophenoxyacetic acid) resistance are changing the way many growers manage weeds. However, past reliance on glyphosate and mistakes made in stewardship of the glyphosate-resistant cropping system have directly led to the current weed resistance problems that now occur in many agronomic cropping systems, and new technologies must be well-stewarded. New herbicide-resistant trait technologies in soybean, such as dicamba-, 2,4-D-, and isoxaflutole- ((5-cyclopropyl-4-isoxazolyl)[2-(methylsulfonyl)-4-(trifluoromethyl)phenyl]methanone) resistance, are being combined with glyphosate- and glufosinate-resistance traits to manage herbicide-resistant weed populations. In cropping systems with glyphosate-resistant weed species, these new trait options may provide effective weed management tools, although there may be increased risk of off-target movement and susceptible plant damage with the use of some of these technologies. The use of diverse weed management practices to reduce the selection pressure for herbicide-resistant weed evolution is essential to preserve the utility of new traits. The use of herbicides with differing sites of action (SOAs), ideally in combination as mixtures, but also in rotation as part of a weed management program may slow the evolution of resistance in some cases. Increased selection pressure from the effects of some herbicide mixtures may lead to more cases of metabolic herbicide resistance. The most effective long-term approach for weed resistance management is the use of Integrated Weed Management (IWM) which may build the ecological complexity of the cropping system. Given the challenges in management of herbicide-resistant weeds, IWM will likely play a critical role in enhancing future food security for a growing global population.

Suggested Citation

  • Karla L. Gage & Ronald F. Krausz & S. Alan Walters, 2019. "Emerging Challenges for Weed Management in Herbicide-Resistant Crops," Agriculture, MDPI, vol. 9(8), pages 1-11, August.
    • Handle: RePEc:gam:jagris:v:9:y:2019:i:8:p:180-:d:257611
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    References listed on IDEAS

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    1. Fabian D. Menalled & Robert K. D. Peterson & Richard G. Smith & William S. Curran & David J. Páez & Bruce D. Maxwell, 2016. "The Eco-Evolutionary Imperative: Revisiting Weed Management in the Midst of an Herbicide Resistance Crisis," Sustainability, MDPI, vol. 8(12), pages 1-15, December.
    2. Frisvold, George B. & Hurley, Terrance M. & Mitchell, Paul D., 2009. "Adoption of Best Management Practices to Control Weed Resistance By Cotton, Corn, and Soybean Growers," 2009 Annual Meeting, July 26-28, 2009, Milwaukee, Wisconsin 49432, Agricultural and Applied Economics Association.
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    1. Lidija Begović & Nikola Jurišić & Martina Šrajer Gajdošik & Alma Mikuška & Selma Mlinarić, 2023. "Photosynthetic Efficiency and Antioxidative Response of Soybean Exposed to Selective Herbicides: A Field Study," Agriculture, MDPI, vol. 13(7), pages 1-16, July.
    2. Euro Pannacci & Daniele Del Buono & Maria Luce Bartucca & Luigi Nasini & Primo Proietti & Francesco Tei, 2020. "Herbicide Uptake and Regrowth Ability of Tall Fescue and Orchardgrass in S-Metolachlor-Contaminated Leachates from Sand Pot Experiment," Agriculture, MDPI, vol. 10(10), pages 1-10, October.
    3. Tibugari, Handsen & Chiduza, Cornelius & Mashingaidze, AB & Mabasa, S, 2022. "Reduced atrazine doses combined with sorghum aqueous extracts inhibit emergence and growth of weeds," African Journal of Food, Agriculture, Nutrition and Development (AJFAND), African Journal of Food, Agriculture, Nutrition and Development (AJFAND), vol. 22(03).
    4. Alfredo Junior Paiola Albrecht & Guilherme Thomazini & Leandro Paiola Albrecht & Afonso Pires & Juliano Bortoluzzi Lorenzetti & Maikon Tiago Yamada Danilussi & André Felipe Moreira Silva & Fernando St, 2020. "Conyza sumatrensis Resistant to Paraquat, Glyphosate and Chlorimuron: Confirmation and Monitoring the First Case of Multiple Resistance in Paraguay," Agriculture, MDPI, vol. 10(12), pages 1-11, November.

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