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Biblioteca (s) : |
INIA La Estanzuela. |
Fecha : |
25/04/2022 |
Actualizado : |
25/04/2022 |
Autor : |
KASPARY, T. E.; LAMEGO, F. P.; CUTTI, L.; AGUIAR, A. C. DE M.; RIGON, C. A. G.; BASSO, C. J. |
Título : |
Growth, phenology, and seed viability between glyphosate-resistant and glyphosate-susceptible hairy fleabane. |
Fecha de publicación : |
2017 |
Fuente / Imprenta : |
Bragantia, Campinas v. 76, n. 1, p. 92-101, jan./mar. 2017. |
Idioma : |
Inglés |
Contenido : |
Glyphosate is the herbicide most used worldwide. In cropping systems that rely on repeated applications of glyphosate or cultivate genetically modified soyabean crop, there are numerous cases of glyphosate resistant weeds, including Conyza bonariensis. Differences among competitive ability of Conyza spp. have been found. However, little information is available on the fitness costs related to glyphosate resistance in Conyza bonariensis. We evaluated growth, phenology, and seed viability of glyphosate-resistant (GR) and glyphosate-susceptible (GS) Conyza bonariensis from Brazil, in 2012 (fall/winter) and 2013 (spring/summer). When grown alone, in pots, C. bonariensis GR biotype developed more rapidly than the GS biotype, as evidenced by their earlier bolting, flowering, and seed set. In 2012, GR biotype showed 221.9 cm of plant height compared to 181.1 cm from GS, at the flowering time. In both years, the seed production per plant was superior for GR biotype, showing germination higher than 80% against 66.5% from the GS biotype. Thus, C. bonariensis GR biotype confirmed no fitness penalty also showing characteristics that allow us to infer in superior competitive with the absence of the herbicide. It is important to point out that the biotypes evaluated here have different genetic background and the differences between them may not be fully attributed to the resistance to glyphosate. However, the GR biotype can persist in the environment and outcompete with GS biotypes regardless of further glyphosate selection of pressure. MenosGlyphosate is the herbicide most used worldwide. In cropping systems that rely on repeated applications of glyphosate or cultivate genetically modified soyabean crop, there are numerous cases of glyphosate resistant weeds, including Conyza bonariensis. Differences among competitive ability of Conyza spp. have been found. However, little information is available on the fitness costs related to glyphosate resistance in Conyza bonariensis. We evaluated growth, phenology, and seed viability of glyphosate-resistant (GR) and glyphosate-susceptible (GS) Conyza bonariensis from Brazil, in 2012 (fall/winter) and 2013 (spring/summer). When grown alone, in pots, C. bonariensis GR biotype developed more rapidly than the GS biotype, as evidenced by their earlier bolting, flowering, and seed set. In 2012, GR biotype showed 221.9 cm of plant height compared to 181.1 cm from GS, at the flowering time. In both years, the seed production per plant was superior for GR biotype, showing germination higher than 80% against 66.5% from the GS biotype. Thus, C. bonariensis GR biotype confirmed no fitness penalty also showing characteristics that allow us to infer in superior competitive with the absence of the herbicide. It is important to point out that the biotypes evaluated here have different genetic background and the differences between them may not be fully attributed to the resistance to glyphosate. However, the GR biotype can persist in the environment and outcompete with GS biotypes regard... Presentar Todo |
Palabras claves : |
CONYZA BONARIENSIS; Dry weight; Leaf area; Plant height; Seed set. |
Thesagro : |
Área foliar; Estatura de planta; Semente. |
Asunto categoría : |
-- |
Marc : |
LEADER 02349naa a2200277 a 4500 001 1063084 005 2022-04-25 008 2017 bl uuuu u00u1 u #d 100 1 $aKASPARY, T. E. 245 $aGrowth, phenology, and seed viability between glyphosate-resistant and glyphosate-susceptible hairy fleabane.$h[electronic resource] 260 $c2017 520 $aGlyphosate is the herbicide most used worldwide. In cropping systems that rely on repeated applications of glyphosate or cultivate genetically modified soyabean crop, there are numerous cases of glyphosate resistant weeds, including Conyza bonariensis. Differences among competitive ability of Conyza spp. have been found. However, little information is available on the fitness costs related to glyphosate resistance in Conyza bonariensis. We evaluated growth, phenology, and seed viability of glyphosate-resistant (GR) and glyphosate-susceptible (GS) Conyza bonariensis from Brazil, in 2012 (fall/winter) and 2013 (spring/summer). When grown alone, in pots, C. bonariensis GR biotype developed more rapidly than the GS biotype, as evidenced by their earlier bolting, flowering, and seed set. In 2012, GR biotype showed 221.9 cm of plant height compared to 181.1 cm from GS, at the flowering time. In both years, the seed production per plant was superior for GR biotype, showing germination higher than 80% against 66.5% from the GS biotype. Thus, C. bonariensis GR biotype confirmed no fitness penalty also showing characteristics that allow us to infer in superior competitive with the absence of the herbicide. It is important to point out that the biotypes evaluated here have different genetic background and the differences between them may not be fully attributed to the resistance to glyphosate. However, the GR biotype can persist in the environment and outcompete with GS biotypes regardless of further glyphosate selection of pressure. 650 $aÁrea foliar 650 $aEstatura de planta 650 $aSemente 653 $aCONYZA BONARIENSIS 653 $aDry weight 653 $aLeaf area 653 $aPlant height 653 $aSeed set 700 1 $aLAMEGO, F. P. 700 1 $aCUTTI, L. 700 1 $aAGUIAR, A. C. DE M. 700 1 $aRIGON, C. A. G. 700 1 $aBASSO, C. J. 773 $tBragantia, Campinas$gv. 76, n. 1, p. 92-101, jan./mar. 2017.
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INIA La Estanzuela (LE) |
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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
Fecha actual : |
06/07/2022 |
Actualizado : |
06/07/2022 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Circulación / Nivel : |
Internacional - -- |
Autor : |
MARQUES, S.; VILA-AIUB, M.; HERNÁNDEZ, M.; KASPARY, T. E.; GARCIA, A. |
Afiliación : |
SOFÍA MARQUES HILL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; MARTIN VILA-AIUB, IFEVA -CONICET.Faculty of Agronomy, Department of Ecology, University of Buenos Aires (UBA), Buenos Aires, Argentina.; MANUEL HERNÁNDEZ, School of Agronomy, University of the Republic of Uruguay, Montevideo, Uruguay.; TIAGO EDU KASPARY, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; MILTON ALEJANDRO GARCIA LATASA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
Cross-and multiple herbicide resistance in Lolium multiflorum across Uruguay. |
Fecha de publicación : |
2022 |
Fuente / Imprenta : |
Weed Research, 2022,1-10. Doi: https://doi.org/10.1111/wre.12545 |
Serie : |
Online:1365-3180 |
DOI : |
10.1111/wre.12545 |
Idioma : |
Inglés |
Notas : |
Article history: Received: 1 March 2022/Accepted: 31 May 2022/First Published: 5 July 2022. |
Contenido : |
Abstract: Herbicide resistance is currently one of the most important problems in agricultural systems, threatening their sustainability. In Uruguay, there have been increasing reports of herbicide failures to control LOLMU (Lolium multiflorum Lam.) populations.
However, methodical characterization of herbicide resistance cases is lacking. Seeds from 66 LOLMU populations were collected from cropping fields and screened in greenhouse conditions with the recommended (1x) and half the recommended (1/2x) label dose of glyphosate, clethodim, pinoxaden and a formulation with iodosulfuron-methyl-sodium and mesosulfuron-methyl (IodoMeso). Populations were classified as resistant when mortality was equal to or lower than 80% in response to 1x doses, assessed 28 days after treatment (DAT). Results show that 80% of LOLMU populations were resistant to glyphosate, followed by 49%, 36% and 24% resistance to IodoMeso, pinoxaden and clethodim respectively. Moreover, 52% of the tested populations were resistant to more than one herbicide, with an important frequency of populations resistant to glyphosate and IodoMeso (17%) and to all tested herbicides (16%). In addition, a high correlation of resistance levels was found between pinoxaden and clethodim resistant populations (R2 = 0.84). Geographic distribution of tested populations suggests that multiple herbicide resistance is concentrated in fields with a longer history of herbicide use. Overall, these results confirm that herbicide resistance in LOLMU is widespread in agricultural regions of Uruguay and that significant number of multiple resistance cases already exist and are expected to increase rapidly if management practices are not adjusted quickly and substantially.This survey represents a key input to improve herbicide-resistant LOLMU management strategies. MenosAbstract: Herbicide resistance is currently one of the most important problems in agricultural systems, threatening their sustainability. In Uruguay, there have been increasing reports of herbicide failures to control LOLMU (Lolium multiflorum Lam.) populations.
However, methodical characterization of herbicide resistance cases is lacking. Seeds from 66 LOLMU populations were collected from cropping fields and screened in greenhouse conditions with the recommended (1x) and half the recommended (1/2x) label dose of glyphosate, clethodim, pinoxaden and a formulation with iodosulfuron-methyl-sodium and mesosulfuron-methyl (IodoMeso). Populations were classified as resistant when mortality was equal to or lower than 80% in response to 1x doses, assessed 28 days after treatment (DAT). Results show that 80% of LOLMU populations were resistant to glyphosate, followed by 49%, 36% and 24% resistance to IodoMeso, pinoxaden and clethodim respectively. Moreover, 52% of the tested populations were resistant to more than one herbicide, with an important frequency of populations resistant to glyphosate and IodoMeso (17%) and to all tested herbicides (16%). In addition, a high correlation of resistance levels was found between pinoxaden and clethodim resistant populations (R2 = 0.84). Geographic distribution of tested populations suggests that multiple herbicide resistance is concentrated in fields with a longer history of herbicide use. Overall, these results confirm that herbicide resista... Presentar Todo |
Palabras claves : |
Herbicide-resistant ryegrass; Resistance evolution; Resistance screening; South America. |
Thesagro : |
CONTROL DE MALEZAS; HERBICIDAS. |
Asunto categoría : |
H60 Malezas y escardas |
Marc : |
LEADER 02727naa a2200277 a 4500 001 1063406 005 2022-07-06 008 2022 bl uuuu u00u1 u #d 024 7 $a10.1111/wre.12545$2DOI 100 1 $aMARQUES, S. 245 $aCross-and multiple herbicide resistance in Lolium multiflorum across Uruguay.$h[electronic resource] 260 $c2022 490 $aOnline:1365-3180 500 $aArticle history: Received: 1 March 2022/Accepted: 31 May 2022/First Published: 5 July 2022. 520 $aAbstract: Herbicide resistance is currently one of the most important problems in agricultural systems, threatening their sustainability. In Uruguay, there have been increasing reports of herbicide failures to control LOLMU (Lolium multiflorum Lam.) populations. However, methodical characterization of herbicide resistance cases is lacking. Seeds from 66 LOLMU populations were collected from cropping fields and screened in greenhouse conditions with the recommended (1x) and half the recommended (1/2x) label dose of glyphosate, clethodim, pinoxaden and a formulation with iodosulfuron-methyl-sodium and mesosulfuron-methyl (IodoMeso). Populations were classified as resistant when mortality was equal to or lower than 80% in response to 1x doses, assessed 28 days after treatment (DAT). Results show that 80% of LOLMU populations were resistant to glyphosate, followed by 49%, 36% and 24% resistance to IodoMeso, pinoxaden and clethodim respectively. Moreover, 52% of the tested populations were resistant to more than one herbicide, with an important frequency of populations resistant to glyphosate and IodoMeso (17%) and to all tested herbicides (16%). In addition, a high correlation of resistance levels was found between pinoxaden and clethodim resistant populations (R2 = 0.84). Geographic distribution of tested populations suggests that multiple herbicide resistance is concentrated in fields with a longer history of herbicide use. Overall, these results confirm that herbicide resistance in LOLMU is widespread in agricultural regions of Uruguay and that significant number of multiple resistance cases already exist and are expected to increase rapidly if management practices are not adjusted quickly and substantially.This survey represents a key input to improve herbicide-resistant LOLMU management strategies. 650 $aCONTROL DE MALEZAS 650 $aHERBICIDAS 653 $aHerbicide-resistant ryegrass 653 $aResistance evolution 653 $aResistance screening 653 $aSouth America 700 1 $aVILA-AIUB, M. 700 1 $aHERNÁNDEZ, M. 700 1 $aKASPARY, T. E. 700 1 $aGARCIA, A. 773 $tWeed Research, 2022,1-10. Doi: https://doi.org/10.1111/wre.12545
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