Considering weed management as a social dilemma bridges individual and collective interests

Bagavathiannan, Muthukumar; Graham, Sonia; Ma, Zhao; Barney, Jacob N.; Coutts, Shaun R.; Caicedo, Ana L.; Clerck-Floate, Rosemarie De; West, Natalie M.; Blank, Lior; Metcalf, Alexander L.; Lacoste, Myrtille; Moreno, Carlo R.; Evans, Joyce J.; Burke, Ian C.; Beckie, Hugh J.

doi:10.1038/s41477-019-0395-y

Cited by 66 publications

(57 citation statements)

References 84 publications

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“…Current weed management practices such as herbicide applications tend to focus on property-level management decisions, where actions usually neglect landscape-scale outcomes 1 . The recurrent herbicide drift complaints in agricultural landscapes evidences this situation.…”

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confidence: 99%

Herbicide drift exposure leads to reduced herbicide sensitivity in Amaranthus spp.

Vieira

Luck

Amundsen

et al. 2020

Sci Rep

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While the introduction of herbicide tolerant crops provided growers new options to manage weeds, the widespread adoption of these herbicides increased the risk for herbicide spray drift to surrounding vegetation. the impact of herbicide drift in sensitive crops is extensively investigated, whereas scarce information is available on the consequences of herbicide drift in non-target plants. Weeds are often abundant in field margins and ditches surrounding agricultural landscapes. Repeated herbicide drift exposure to weeds could be detrimental to long-term management as numerous weeds evolved herbicide resistance following recurrent-selection with low herbicide rates. the objective of this study was to evaluate if glyphosate, 2,4-D, and dicamba spray drift could select Amaranthus spp. biotypes with reduced herbicide sensitivity. palmer amaranth and waterhemp populations were recurrently exposed to herbicide drift in a wind tunnel study over two generations. Seeds from survival plants were used for the subsequent rounds of herbicide drift exposure. progenies were subjected to herbicide doseresponse studies following drift selection. Herbicide drift exposure rapidly selected for Amaranthus spp. biotypes with reduced herbicide sensitivity over two generations. Weed management programs should consider strategies to mitigate near-field spray drift and suppress the establishment of resistance-prone weeds on field borders and ditches in agricultural landscapes.Some researchers also suggest that low rates of herbicides could induce new stress-related mutations and epigenetic alterations on weeds, ultimately leading to reduced herbicide sensitivity [33][34][35] .Recombination and accumulation of minor resistance alleles can occur at a faster rate in cross-pollinated species, such as Palmer amaranth and waterhemp, during recurrent selection with low rates of herbicides 21,22,36 . These C4 summer annual Amaranthus spp. are among the most troublesome weed species in the US row crop production systems 37 . Both are obligate outcrossing dioecious weed species with a fast growth habitat, extended emergence window, and prolific seed production with high genetic plasticity which pose a challenge to their management 37-44 . Numerous Palmer amaranth and waterhemp populations have evolved resistance to herbicides that target 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS), 4-hydroxyphenylpyruvate dioxygenase (HPPD), photosystem II, protoporphyrinogen oxidase (PPO), auxin receptors, microtubule assembly, and acetolacte synthase (ALS) in the US 15,17,[45][46][47][48][49][50][51][52][53][54] . Moreover, pollen mediated gene flow has been reported as a major contributor to herbicide resistance dissemination in Palmer amaranth and waterhemp in the US Midwest 55,56 .Although controlling weed populations on field margins and ditches is considered a best management practice to delay herbicide resistance evolution, these weed populations are often neglected in agricultural landscapes [15][16][17]29 . The hypothesis of this study is that rep...

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confidence: 99%

Herbicide drift exposure leads to reduced herbicide sensitivity in Amaranthus spp.

Vieira

Luck

Amundsen

et al. 2020

Sci Rep

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“…The current economic situation in the US does not support grower adoption of alternative weed control methodologies due to the perceived risk associated with alternative tactics; financial and social incentives to adopt diversified weed management systems, as in an IWM approach, may improve adoption rate [18]. Grower networks, operating at relevant geographic scales, could encourage proactive change through sharing of knowledge and equipment [44,45]. IWM would require complex, detailed knowledge of weed biology and ecology to understand the impact of management on seed banks, alternative weed control strategies, the critical period of weed interference, and how to create optimal conditions for the crop to increase crop competitiveness [19,46].…”

Section: Herbicide Resistancementioning

confidence: 99%

Emerging Challenges for Weed Management in Herbicide-Resistant Crops

2019

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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.

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“…Preserving plant health from disease has public good attributes because one grower's benefits from low disease pressure does not reduce the ability of others in the affected region to also benefit (i.e., it is non-rivalrous), and no grower can be excluded from the benefits of healthy production (i.e., it is non-excludable) (Lansink, 2011). Pioneering studies proposed that invasive species management generated environments free of invasive species that also had public good attributes (Perrings et al, 2002;Sumner, 2003), and the concept of reducing invasive species or weeds as a public good has been reviewed recently (Bagavathiannan et al, 2019;Graham et al, 2019, Niemiec et al, 2020. In essence, the notion is that individuals pursuing their own interests by taking actions to ensure plant health on their own properties can benefit from provision generated by nearby properties.…”

Section: Introductionmentioning

confidence: 99%

Institutional approaches for plant health provision as a collective action problem

et al. 2021

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The provision of plant health has public good attributes when nobody can be excluded from enjoying its benefits and individual benefits do not reduce the ability of others to also benefit. These attributes increase risk of free-riding on plant health services provided by others, giving rise to a collective action problem when trying to ensure plant health in a region threatened by an emerging plant disease. This problem has traditionally been addressed by government intervention, but top-down approaches to plant health are often insufficient and are increasingly combined with bottom-up approaches that promote self-organization by affected individuals. The challenge is how to design plant health institutions that effectively deal with the spatial and temporal dynamics of plant diseases, while staying aligned with the preferences, values and needs of affected societies. Here, we illustrate how Ostrom’s design principles for collective action can be used to guide the incorporation of bottom-up approaches to plant health governance in order to improve institutional fit. Using the ongoing epidemic of huanglongbing (HLB) as a case study, we examine existing institutions designed to ensure citrus health under HLB in Brazil, Mexico, the United States and Argentina, and discuss potential implications of Ostrom’s design principles for the collective provision of plant health under HLB and other plant diseases that are threatening food security worldwide. The discussion leads to an outline for the interdisciplinary research agenda that would be needed to establish the link between institutional approaches and plant health outcomes in the context of global food security.

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Considering weed management as a social dilemma bridges individual and collective interests

Cited by 66 publications

References 84 publications

Herbicide drift exposure leads to reduced herbicide sensitivity in Amaranthus spp.

Herbicide drift exposure leads to reduced herbicide sensitivity in Amaranthus spp.

Emerging Challenges for Weed Management in Herbicide-Resistant Crops

Institutional approaches for plant health provision as a collective action problem

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