Herbicide Resistance in Weeds

Moss, S. R.

doi:10.1002/9781119380702.ch7

Cited by 16 publications

(16 citation statements)

References 76 publications

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“…Total or partial glyphosate resistance/tolerance may be due to alterations in the target‐site represented by single or double mutations in the conserved region of the EPSPS gene, EPSPS gene duplication or both . Reduced uptake and/or impaired translocation and degradation of glyphosate into non‐toxic substances as well as hypersensitive reactions have also been reported as non‐target site resistance mechanisms contributing to the resistance to this herbicide …”

Section: Introductionmentioning

confidence: 99%

“…4,23 Reduced uptake and/or impaired translocation and degradation of glyphosate into non-toxic substances as well as hypersensitive reactions have also been reported as non-target site resistance mechanisms contributing to the resistance to this herbicide. [24][25][26] Chloris barbata individuals survived the widely used standard dose of 720 g acid equivalent (ae) ha −1 of glyphosate in citrus-production systems from Colima. Loss of susceptibility to glyphosate in C. barbata may be due to an increase in its innate tolerance or the evolution of resistance mechanisms.…”

Section: Introductionmentioning

confidence: 99%

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From tolerance to resistance: mechanisms governing the differential response to glyphosate in Chloris barbata

Bracamonte

Silveira

Cruz

et al. 2018

Pest Management Science

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

From tolerance to resistance: mechanisms governing the differential response to glyphosate in Chloris barbata

Bracamonte

Silveira

Cruz

et al. 2018

Pest Management Science

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“…In 1995, 324,000 ha of arable land were treated with glyphosate, but by 2016 this had increased to 2,665,000 ha (Garthwaite et al 2018). This increase in glyphosate use is due to several factors, including the loss of paraquat, which was banned in the European Union in 2007 (Chauvel et al 2012; Clark 2012), increasing herbicide resistance to other modes of action in the United Kingdom (Hicks et al 2018; Moss 2017b; Moss et al 2011), and a reduction in the cost of glyphosate since 1993 (Woodburn 2000). Together, these factors have led to greater glyphosate usage and, consequently, have increased the risk of glyphosate resistance in the United Kingdom, particularly in weeds that are becoming more prevalent in arable farming situations.…”

Section: Introductionmentioning

confidence: 99%

The First Cases of Evolving Glyphosate Resistance in UK Poverty Brome (Bromus sterilis) Populations

et al. 2018

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Poverty brome (Bromus sterilisL.) [sterile or barren brome, syn.Anisantha sterilis(L.) Nevski] is a problematic UK arable weed. There are currently no confirmed cases of glyphosate resistance in any weed species in the United Kingdom or inB. sterilisworldwide. However, there are reports of poor control by glyphosate in this species. Here, we report experiments to confirm the suspected on-farm resistance ofB. sterilispopulations to glyphosate. Glyphosate screening and dose–response experiments established that glyphosate sensitivity of three UKB. sterilispopulations exhibiting poor field control is outside the normal range of sensitivity of 30 sensitive populations and adjacent unexposed populations. Control of sensitive populations ranged from 49% to 82% and for suspected resistant populations from 21% to 30%. Dose–response ED50values of sensitive populations ranged between 241 and 313 g ai ha−1; corresponding values of suspected resistant populations ranged between 420 and 810 g ha−1, and resistance indices ranged from 1.55 to 4.5. Suspected resistant populations were incompletely controlled at the recommended field rate of glyphosate (540 g ha−1), while adjacent unexposed populations were completely controlled. We conclude that some UK populations ofB. sterilishave reduced glyphosate sensitivity and are in the process of evolving resistance. This is the first reported case of reduced glyphosate sensitivity in any UK weed species and inB. sterilisworldwide. This, coupled with increasing glyphosate use, highlights the need for increased vigilance and monitoring for glyphosate resistance in the United Kingdom.

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“…Genetic factors such as genetic variability (mutations localized in a single locus), heredity patterns (dominance of genes enable rapid dispersion), type of pollination (cross-pollination allows for greater genetic recombination and recessive alleles are more easily established in autogenous species), flow gene (transfer resistance characteristics to a susceptible population) and number of resistance genes involved; and bioecological factors such as short life cycle, high seed yield, low dormancy, multiple generations per year, mechanism of propagule dispersion, extreme susceptibility to herbicides, population size, and low biodiversity are key factors in the selection of herbicide resistant weed populations [65]. However, in this section only the agronomic, economic, and even scientific-technical factors that may have contributed to the increase in herbicide resistance in Brazil will be discussed.…”

Section: Herbicide Resistance: the Problem And The Causementioning

confidence: 99%

Herbicide Resistance in Brazil: Status, Impacts, and Future Challenges

Cruz¹,

Oliveira²,

Carvalho³

et al. 2020

Pests, Weeds and Diseases in Agricultural Crop and Animal Husbandry Production

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Brazil is a large producer and exporter of crops in global terms. Weeds may be responsible for ~14% of crop losses, depending on the crop system. Herbicides occupy 58% of the Brazilian pesticide market; however, the continuous use of these products and the high selection pressure have led to the emergence of weeds resistant to herbicides. Today, there are 51 weed species reported as being resistant to herbicides in Brazil, of which 17 involves cross and multiple-resistance. Acetolactate synthase (ALS), acetyl coenzyme A carboxylase (ACCase) and 5-enolpiruvylshikimate-3-phosphate synthase (EPSPs) inhibitors are the herbicidal groups with the most resistance cases. Soybean, corn, rice, wheat and cotton present 30, 12, 10, 9 and 8 cases, respectively, occurring mainly in herbicide-resistant crop fields from the Southern and Central West regions of the country. To better understand the dimensions of herbicide resistance, in this chapter, we will explore the size of agricultural activity in Brazil, the pesticide market and the use of herbicides in the main crops. In addition, the agronomic, scientific-technical and economic aspects that have contributed, directly or indirectly, to the selection of resistant weeds will be discussed in order to have an overview of the economic impact of herbicide resistance management.

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Herbicide Resistance in Weeds

Cited by 16 publications

References 76 publications

From tolerance to resistance: mechanisms governing the differential response to glyphosate in Chloris barbata

From tolerance to resistance: mechanisms governing the differential response to glyphosate in Chloris barbata

The First Cases of Evolving Glyphosate Resistance in UK Poverty Brome (Bromus sterilis) Populations

Herbicide Resistance in Brazil: Status, Impacts, and Future Challenges

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