scholarly journals Herbicide Resistance: Definition and Management Strategies

2000 ◽  
Author(s):  
Timothy S Prather ◽  
Joseph M Ditomaso ◽  
Jodie S Holt
Keyword(s):  
Herbicide Resistance ◽  
Management Strategies

Significance and Distribution of Herbicide Resistance

1990 ◽  
Vol 4 (1) ◽  
pp. 141-149 ◽  
Author(s):  
Jodie S. Holt ◽  
Homer M. Lebaron
Keyword(s):  
United States ◽  
United Kingdom ◽  
Herbicide Resistance ◽  
Management Strategies ◽  
The United States ◽  
West Germany ◽  
Weed Species ◽  
Research Education ◽  
Resistant Species ◽  
The United Kingdom

Herbicide-resistant weed species have become widespread in recent years. Fifty-five weed species, including 40 dicots and 15 grasses, are known to have biotypes resistant to the triazine herbicides. One or more resistant species have arisen in 31 states of the United States, four provinces of Canada, 18 countries in Europe, and Israel, Japan, Australia, and New Zealand. Resistance to other classes of herbicides is more restricted in distribution and recent in detection but is becoming more widespread. Trifluralin resistance has spread in the southeastern United States and has been detected in Canada, while 11 species with biotypes resistant to paraquat have been reported around the world. Diclofop-methyl-resistant weed species are problems in cereal production in Australia and have been found in Oregon, South Africa, and the United Kingdom. Resistance to the substituted ureas also is present in the United Kingdom, West Germany, and Hungary. Within the last 2 yr, biotypes of at least four weed species resistant to the sulfonylurea herbicides have arisen following several annual applications of these herbicides in wheat. Some resistant biotypes have multiple resistance to different classes of herbicides, which greatly exacerbates the threat of resistance. Herbicide resistance has reached the level where more concerted efforts are needed in research, education, and development of effective management strategies to preserve herbicides as essential tools of agricultural technology.

Management strategies for attenuating herbicide resistance: untoward consequences of their promotion

2000 ◽  
Vol 19 (8-10) ◽  
pp. 891-895 ◽  
Author(s):  
L.J Shane Friesen ◽  
Gabrielle M Ferguson ◽  
J Christopher Hall
Keyword(s):  
Herbicide Resistance ◽  
Management Strategies

scholarly journals Rapid evolution of weedy traits during sunflower de-domestication: the importance of hybridization and standing genetic variation

2021 ◽  
Author(s):  
Fernando Hernandez ◽  
Roman Boris Vercellino ◽  
Claudio Pandolfo ◽  
Jennifer R. Mandel ◽  
Alejandro Presotto
Keyword(s):  
Genetic Diversity ◽  
Genetic Variation ◽  
Seed Dormancy ◽  
Herbicide Resistance ◽  
Competitive Ability ◽  
Management Strategies ◽  
Rapid Evolution ◽  
High Genetic Diversity ◽  
Herbicide Resistant ◽  
Evolution Of Resistance

Hybridization between crops and their wild relatives may promote the evolution of de-domesticated (feral) weeds. Wild sunflower is typically found in ruderal environments, but crop-wild hybridization may facilitate the evolution of weedy biotypes. Using one crop-specific mitochondrial marker (CMS-PET1) and 14 nuclear SSR markers, we studied the origin and genetic diversity of BRW, a recently discovered weedy biotype. Then, using a resurrection approach, we tested for rapid evolution of weedy traits (seed dormancy, herbicide resistance, and competitive ability) by sampling weedy and wild biotypes 10 years apart (2007 and 2017). All the weedy plants present the CMS-PET1 cytotype, confirming their feral origin. At the nuclear markers, BRW showed higher genetic diversity than the cultivated lines, as high genetic diversity as the most diverse wild biotypes, and low differentiation with one wild biotype, suggesting that wild hybridization increased the genetic diversity of the feral BRW. Regarding weedy trait evolution, we found support for rapid evolution towards higher seed dormancy, but not for higher competitive ability or herbicide resistance. Standing genetic variation probably facilitated the evolution of seed dormancy and limited the evolution of herbicide resistance, as no resistant alleles were found in the ancestral biotype. Our results demonstrate that natural crop-wild hybrids can evolve quickly in farmers' fields, leading to the establishment of weedy biotypes of cultivated origin. Although herbicide resistance did not evolve in BRW, management strategies aimed at preventing the evolution of resistance should be a priority in order to avoid the emergence and spread of herbicide resistant biotypes in Argentina.

Genetic Aspects of Herbicide-Resistant Weed Management

1999 ◽  
Vol 13 (3) ◽  
pp. 647-652 ◽  
Author(s):  
Michael J. Christoffers
Keyword(s):  
Herbicide Resistance ◽  
Weed Management ◽  
Selection Pressure ◽  
Management Strategies ◽  
Resistance Management ◽  
Wild Type ◽  
Frequency Increase ◽  
Specific Nature ◽  
Herbicide Resistant ◽  
Case Basis

Weed populations develop herbicide resistance when they evolve due to selection pressure. Mutations and gene flow contribute to genetic variability and provide resistant alleles. The speed of resistance gene frequency increase is determined by the inheritance of resistance alleles relative to wild-type susceptibility and is influenced by the interaction between gene expression and selection. The goal of herbicide resistance management is to minimize selection pressure while maintaining adequate weed control. However, the specific nature of each herbicide, weed, and resistance combination determines the practices that optimize undesirable selection pressure. Therefore, generalized management strategies should be recommended with caution and must not be mandated without thorough evaluation on a case-by-case basis.

scholarly journals Mechanisms of evolved herbicide resistance

2020 ◽  
Vol 295 (30) ◽  
pp. 10307-10330 ◽  
Author(s):  
Todd A. Gaines ◽  
Stephen O. Duke ◽  
Sarah Morran ◽  
Carlos A. G. Rigon ◽  
Patrick J. Tranel ◽  
...  
Keyword(s):  
Herbicide Resistance ◽  
Cytochromes P450 ◽  
Management Strategies ◽  
Resistance Management ◽  
Gene Families ◽  
Resistance Mechanisms ◽  
Weed Species ◽  
Individual Level ◽  
Large Gene ◽  
Aryl Acylamidase

The widely successful use of synthetic herbicides over the past 70 years has imposed strong and widespread selection pressure, leading to the evolution of herbicide resistance in hundreds of weed species. Both target-site resistance (TSR) and nontarget-site resistance (NTSR) mechanisms have evolved to most herbicide classes. TSR often involves mutations in genes encoding the protein targets of herbicides, affecting the binding of the herbicide either at or near catalytic domains or in regions affecting access to them. Most of these mutations are nonsynonymous SNPs, but polymorphisms in more than one codon or entire codon deletions have also evolved. Some herbicides bind multiple proteins, making the evolution of TSR mechanisms more difficult. Increased amounts of protein target, by increased gene expression or by gene duplication, are an important, albeit less common, TSR mechanism. NTSR mechanisms include reduced absorption or translocation and increased sequestration or metabolic degradation. The mechanisms that can contribute to NTSR are complex and often involve genes that are members of large gene families. For example, enzymes involved in herbicide metabolism–based resistances include cytochromes P450, GSH S-transferases, glucosyl and other transferases, aryl acylamidase, and others. Both TSR and NTSR mechanisms can combine at the individual level to produce higher resistance levels. The vast array of herbicide-resistance mechanisms for generalist (NTSR) and specialist (TSR and some NTSR) adaptations that have evolved over a few decades illustrate the evolutionary resilience of weed populations to extreme selection pressures. These evolutionary processes drive herbicide and herbicide-resistant crop development and resistance management strategies.

Management of pigweed (Amaranthus spp.) in grain sorghum with integrated strategies

2019 ◽  
Vol 33 (5) ◽  
pp. 701-709
Author(s):  
Marshall M. Hay ◽  
J. Anita Dille ◽  
Dallas E. Peterson
Keyword(s):  
Herbicide Resistance ◽  
Management Strategies ◽  
Field Trials ◽  
Grain Sorghum ◽  
Limited Information ◽  
Crop Cultivation ◽  
Row Crop ◽  
Amaranthus Spp ◽  
Narrow Row ◽  
Density And Biomass

AbstractPigweed is difficult to manage in grain sorghum because of widespread herbicide resistance, a limited number of registered effective herbicides, and the synchronous emergence of pigweed with grain sorghum in Kansas. The combination of cultural and mechanical control tactics with an herbicide program are commonly recognized as best management strategies; however, limited information is available to adapt these strategies to dryland systems. Our objective for this research was to assess the influence of four components, including a winter wheat cover crop (CC), row-crop cultivation, three row widths, with and without a herbicide program, on pigweed control in a dryland system. Field trials were implemented during 2017 and 2018 at three locations for a total of 6 site-years. The herbicide program component resulted in excellent control (>97%) in all treatments at 3 and 8 weeks after planting (WAP). CC provided approximately 50% reductions in pigweed density and biomass for both timings in half of the site-years; however, mixed results were observed in the remaining site-years, ranging from no attributable difference to a 170% increase in weed density at 8 WAP in 1 site-year. Treatments including row-crop cultivation reduced pigweed biomass and density in most site-years 3 and 8 WAP. An herbicide program is required to achieve pigweed control and should be integrated with row-crop cultivation or narrow row widths to reduce the risk of herbicide resistance. Additional research is required to optimize the use of CC as an integrated pigweed management strategy in dryland grain sorghum.

scholarly journals Ecological fitness cost associated with the AHAS Trp574Leu mutation in feral Raphanus sativus

2020 ◽  
Author(s):  
Roman B. Vercellino ◽  
Fernando Hernández ◽  
Claudio E. Pandolfo ◽  
Miguel Cantamutto ◽  
Alejandro Presotto
Keyword(s):  
Herbicide Resistance ◽  
Raphanus Sativus ◽  
Plant Density ◽  
Light Exposure ◽  
Seedling Emergence ◽  
Management Strategies ◽  
Fitness Cost ◽  
Acetohydroxyacid Synthase ◽  
Higher Plant ◽  
Ecological Fitness

AbstractGene mutations endowing herbicide resistance may have negative pleiotropic effects on plant fitness. Quantifying these effects is critical for predicting the evolution of herbicide resistance and developing management strategies for herbicide-resistant weeds. This study reports the effects of the acetohydroxyacid synthase (AHAS) Trp574Leu mutation throughout the life cycle of the weed feral radish (Raphanus sativus L.). Resistant and susceptible biotypes responded differently to light and water treatments in relation to germination and emergence. Under light exposure, the resistant biotype showed higher germination and emergence, but no differences were found in seed dormancy, germination in darkness and emergence from buried seeds or pods. The resistant biotype showed delayed and reduced seedling emergence relative to the susceptible biotype under rainfed conditions, but these differences between the biotypes were not detected in irrigated soil. The biotypes showed similar relative growth rates and vegetative biomass. However, under wheat interference, resistant plants had 36–46% less total above-ground biomass, 26–47% less seeds per plant, and 36–53% less plant yield than susceptible ones, and these differences were more evident at higher plant density. This study provides a better understanding of the ecological fitness cost associated with the AHAS Trp574Leu mutation in feral R. sativus. The fitness costs could reduce the frequency of the resistant allele in areas untreated with AHAS inhibiting herbicides.

scholarly journals Herbicide resistance in weeds and its management strategies

2020 ◽  
Vol 8 (3) ◽  
pp. 655-661
Author(s):  
Sunil . ◽  
Deepak Loura ◽  
Amit Dhankar ◽  
Sheshnath Pandey ◽  
Shalu . ◽  
...  
Keyword(s):  
Herbicide Resistance ◽  
Management Strategies

scholarly journals Herbicide Resistance to Metsulfuron-Methyl in Rumex dentatus L. in North-West India and Its Management Perspectives for Sustainable Wheat Production

2021 ◽  
Vol 13 (12) ◽  
pp. 6947
Author(s):  
Ankur Chaudhary ◽  
Rajender Singh Chhokar ◽  
Sachin Dhanda ◽  
Prashant Kaushik ◽  
Simerjeet Kaur ◽  
...  
Keyword(s):  
Herbicide Resistance ◽  
Cropping Systems ◽  
Management Strategies ◽  
Biological Data ◽  
North India ◽  
Wheat Crop ◽  
North West ◽  
Metsulfuron Methyl ◽  
Tillage Practices ◽  
Als Inhibitor

Herbicide resistance in weeds is a global threat to sustaining food security. In India, herbicide-resistant Phalaris minor was the major problem in wheat for more than two decades, but the continuous use of metsulfuron-methyl (an ALS inhibitor) to control broadleaf weeds has resulted in the evolution of ALS inhibitor-resistant Rumex dentatus L. This review summarizes the current scenario of herbicide resistance in R. dentatus, along with its ecology and management perspectives. Studies have provided valuable insights on the emergence pattern of R. dentatus under different environments in relation to tillage, cropping systems, nutrients, and irrigation. Moreover, R. dentatus has exhibited higher emergence under zero tillage, with high infestation levels in rice-wheat compared to other wheat-based cropping systems (sorghum-wheat). Alternative herbicides for the management of resistant R. dentatus include pendimethalin, 2,4-D, carfentrazone, isoproturon, and metribuzin. Although the pre-emergence application of pendimethalin is highly successful in suppressing R. dentatus, but its efficiency is questionable under lower field soil moisture and heavy residue load conditions. Nevertheless, the biological data may be utilized to control R. dentatus. Therefore, herbicide rotation with suitable spray techniques, collecting weed seeds at differential heights from wheat, crop rotation, alternate tillage practices, and straw retention are recommended for addressing the resistance issue in R. dentatus in North India conditions. Overall, we discuss the current state of herbicide resistance in R. dentatus, the agronomic factors affecting its population, its proliferation in specific cropping systems (rice-wheat), and management strategies for containing an infestation of a resistant population.

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