Emerging Challenges for Weed Management in Herbicide-Resistant Crops
Open Access
- 13 August 2019
- journal article
- review article
- Published by MDPI AG in Agriculture
- Vol. 9 (8), 180
- https://doi.org/10.3390/agriculture9080180
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.This publication has 56 references indexed in Scilit:
- Surface Temperature Inversions and Risk of Off-Target Herbicide Damage in the Soybean- and Cotton-Growing Regions of the USCrop, Forage & Turfgrass Management, 2019
- Field Measurements of Drift of Conventional and Drift Control Formulations of 2,4-D Plus GlyphosateWeed Technology, 2018
- A Meta-Analysis on the Effects of 2,4-D and Dicamba Drift on Soybean and CottonWeed Science, 2014
- Navigating a Critical Juncture for Sustainable Weed ManagementBioScience, 2012
- Herbicide-Resistant Crops: Utilities and Limitations for Herbicide-Resistant Weed ManagementJournal of Agricultural and Food Chemistry, 2010
- Dicamba Resistance: Enlarging and Preserving Biotechnology-Based Weed Management StrategiesScience, 2007
- Herbicide-Resistant Weeds: Management Tactics and PracticesWeed Technology, 2006
- Changes in Herbicide Use Patterns and Production Practices Resulting from Glyphosate-Resistant CropsWeed Technology, 2006
- Imidazolinone‐tolerant crops: history, current status and futurePest Management Science, 2004
- Control of Volunteer Sethoxydim-Resistant Corn (Zea mays) in Soybean (Glycine max)Weed Technology, 1997