Predicting the Evolution and Dynamics of Herbicide Resistance in Weed Populations

Maxwell, Bruce D.; Roush, Mary Lynn; Radosevich, Steven R.

doi:10.1017/s0890037x0002488x

Cited by 263 publications

(291 citation statements)

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“…he application of systemic herbicides to control weeds exerts intense selection pressure on weed populations (up to 99.99 %) (Maxwell et al 1990), and the extensive application of herbicides with the same mode of action selects for mutations at the site of action or changes plant metabolism that allows plants to resist these herbicides (Powles & Yu 2010). The intense selection pressure reduces the effective plant population size to only few resistant individuals.…”

Section: Author Contributionsmentioning

confidence: 99%

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Evolution, growth and phenology of Phalaris minor biotypes resistant to ACCase-inhibiting herbicides in Mexico

et al. 2018

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Background: Herbicide application to control weeds can promote a rapid selection of resistant phenotypes in small geographic areas. Also, in areas with a spatial heterogeneous management, resistance may evolve independently, promoting local adaptation in weeds. In the mexican region known as "El Bajio," 100,000 ha are cultivated with wheat, and the weed Phalaris minor, resistant to ACCase-inhibiting herbicides is commonly present. Question:We aim to identify the population structure of two genes in four different P. minor biotypes from "El Bajio" and to determine their association with phenology and plant growth differences (biomass and seed yield) that may contribute to survival in the agricultural environment.Studied species: Phalaris minor Retz. Study site and years of study: The study was carried out at a greenhouse and at the molecular biology laboratory of the Colegio de Postgraduados, during 2013 and 2014. Methods:The diversity of the psbA gene and the sequence of two ACCase gene fragments as well as phenology, growth and biomass allocation were evaluated. Results:Results indicated different polymorphism levels for the two genes. There were no differences in the psbA gene between biotypes, although the ACCase gene exhibited high polymorphism level. In addition, each biotype showed differences in phenology, biomass accumulation and fecundity. Conclusions:The ACCase-inhibiting herbicide resistance in "El Bajio" region might be a resistance hotspot leading to the local adaptation of weeds.Key words: Evolution, herbicide resistance, local adaptation. ResumenAntecedentes: La aplicación de herbicidas para el control de las malezas puede fomentar una rápida selección de fenotipos resistentes en áreas geográficas pequeñas. También, en áreas con un manejo heterogeneo espacial, la resistencia puede evolucionar independientemente, promoviendo adaptaciones locales de las malezas. En la region mexicana conocida como "El Bajío", se cultivan 100,000 ha con trigo, y la maleza Phalaris minor, resistente a herbicidas inhibidores de la ACCasa está comunmente presente.Pregunta: El objetivo fue identificar la estructura poblacional de dos genes en cuatro biotipos diferentes de P. minor de "El Bajío" y determinar su asociación con las diferencias en fenología y crecimiento de la planta (biomasa y rendimiento de semilla) que puedan contribuir a la sobrevivencia en campos agrícolas.Especie estudiada: Phalaris minor Retz. Sitio y años de estudio: El estudio se realizó en un invernadero y en el laboratorio de Biología Molecular del Colegio de Postgraduados durante 2013 y 2014.Métodos: La diversidad del gen psbA y la secuencia de dos fragmentos del gen ACCasa fueron evaluados, así como también la fenología, el crecimiento y la asignación de biomasa.Resultados: Los resultados indicaron diferentes niveles de polimorfismo para los dos genes. No hubieron diferencias en el gen psbA entre los biotipos, aunque el gen ACCasa exhibió nivel alto de polimorfismo. Además, cada biotipo mostró diferencias en la fenología, acumulación de ...

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Section: Author Contributionsmentioning

confidence: 99%

“…The intense selection pressure reduces the effective plant population size to only few resistant individuals. The continued use of the same herbicide on each generation increases the number of resistant individuals that can outcompete susceptible individuals (Maxwell et al 1990).…”

Section: Author Contributionsmentioning

confidence: 99%

Evolution, growth and phenology of Phalaris minor biotypes resistant to ACCase-inhibiting herbicides in Mexico

et al. 2018

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“…Fitness plays an important rôle in herbicide résistance models (Maxwell et al 1990). In the présence of s-triazines, the résistant biotype is more fit than the susceptible because of its capacity to survive and reproduce.…”

Section: Modes Of Compétition Experimentsmentioning

confidence: 99%

Relative fitness of s-triazine susceptible and resistant biotypes of Chenopodium album

Leroux

2005

phyto

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La compétitivité relative de deux biotypes de Chenopodium album, un sensible et l'autre résistant aux s-triazines, a été comparée lors de trois expériences menées en serres. En absence de compétition, la production de biomasse sèche n'a pas différé entre les deux biotypes, mais le biotype résistant a alloué moins de matière sèche à la production de semences et a produit moins de semences que le biotype sensible. Les résultats obtenus de séries de remplacement (de Wit) menées à une densité de 400 plants m2 ont indiqué que la proportion relative de la biomasse et du nombre de semences produites par le biotype sensible était toujours plus grande que la proportion de plantes susceptibles présentes dans le mélange. Les effets de la compétition racinaire, de la compétition aérienne, et de la compétition complète (racinaire + aérienne) ont été comparés à des densités de 400, 666, 934, 1200, et 1466 plantules m-2. Les biotypes ont eu l'effet le plus marqué sur toutes les variables mesurées parmi les facteurs étudiés. Les plantules du biotype sensible atteignaient une hauteur plus grande, avaient un indice de surface foliaire (ISF) supérieur, produisaient plus de feuilles, et des rendements foliaire, caulinaire et total plus grands que les plantules résistantes, peu importe la densité de plantules ou le mode de compétition. La compétitivité du biotype sensible à l'égard du biotype résistant s'est exprimée le plus lorsque les deux biotypes rivalisaient entre eux pour la lumière. Les effets de la compétition aérienne sur le rendement, l'ISF, le nombre de feuilles, et la hauteur des plantules étaient aussi importants que la compétition complète. Les effets de la compétition racinaire, bien que significatifs, n'étaient pas aussi importants. Les résultats indiquent que s'il y a arrêt de l'utilisation des s-triazines, la population de C. album évoluera naturellement vers la susceptibilité aux s-triazines à cause de la compétitivité supérieure du biotype sensible.The relative fitness of s-triazine susceptible and resistant biotypes ofChenopodium album from Quebec were compared in three greenhouse experiments. Under non-competitive conditions, there was no difference in dry matter production between biotypes, but the resistant biotype allocated less dry matter to seed production and produced fewer seeds than the susceptible. Results from de Wit replacement series performed at 400 plants m2 indicated that the relative proportion of biomass and seeds produced by the susceptible biotype was always greater than the proportion of susceptible plants present in any given treatment. The effects of root, shoot, and full (root + shoot) competition were compared between and within biotypes at planting densities of 400,666,934,1200, and 1466 seedlings m-2. Biotype had the most pronounced effect on all variables among the factors studied. The susceptible seedlings were taller, had a greater leaf area index (LAI), more leaves, and greater leaf, stem, and above-ground dry matter yields than the resistant seedlings, regardless of the planting de...

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“…Only in long-term experiments is it possible to determine the effects of individual herbicides on the dynamics of the weed population and to monitor the transformation of the flora. In addition, long-term experiments can be used to trace the development of herbicide resistance, and in particular to check the predictions made by resistance simulation models (Gressel and Segel, 1978;Maxwell et al, 1990).…”

Section: Introductionmentioning

confidence: 99%

Effect of herbicide treatments on the weed mass in a long-term experiment in Martonvásár

Berzsenyi

Solymosi

Árendás

et al. 2010

Acta Agronomica Hungarica

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The weed mass (g m -2 ) recorded in the first 15 years (1965)(1966)(1967)(1968)(1969)(1970)(1971)(1972)(1973)(1974)(1975)(1976)(1977)(1978)(1979)) of a long-term, bifactorial, split-plot herbicide experiment (main plots: two types of soil cultivation, subplots: 7 herbicide treatments, with two control plots) without crops indicated that the best weed control was achieved with 10 kg ha -1 rates of simazine and atrazine. These were followed by 5 kg ha -1 ametryn, 10 kg ha -1 linuron and 2+2 kg ha -1 2,4-D, all with moderate efficiency, while 5 kg ha -1 prometryn and 10 kg ha -1 monolinuron resulted in poorer weed control. Medium deep ploughing once a year in autumn reduced the weed mass by 36.5%. There was a substantial year effect, well illustrated by the annual changes in weed mass both in the herbicide treatments and in the control plots. In plots treated with simazine and atrazine there was an exponential increase in the weed mass from the 17 th year of the experiment, suggesting the multiplication of weed biotypes resistant to triazine. As a result of some herbicide treatments there was a shift in the monocot-dicot ratio.

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Predicting the Evolution and Dynamics of Herbicide Resistance in Weed Populations

Cited by 263 publications

References 16 publications

Evolution, growth and phenology of Phalaris minor biotypes resistant to ACCase-inhibiting herbicides in Mexico

Evolution, growth and phenology of Phalaris minor biotypes resistant to ACCase-inhibiting herbicides in Mexico

Relative fitness of s-triazine susceptible and resistant biotypes of Chenopodium album

Effect of herbicide treatments on the weed mass in a long-term experiment in Martonvásár

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