2001
DOI: 10.1590/s0100-204x2001000400002
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Resistencia de Amaranthus quitensis a imazetapir y clorimurón-etil

Abstract: El objetivo de este trabajo fue establecer la existencia de biotipos de A. quitensis H.B.K. resistentes a imazetapir y clorimurón-etil. Se utilizaron semillas recolectadas en las localidades de Zavalla, General Baldissera, Marcos Juárez y Las Rosas. Las dosis de herbicidas utilizadas fueron 1/8x, 1/4x, 1/2x, 1x, 5x, 10x y 20x de la dosis de uso recomendada. Se determinó la mortalidad y biomasa de las plantas tratadas. Se calcularon las dosis de herbicidas requeridas para reducir en un 50% la biomasa de las pla… Show more

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Cited by 9 publications
(9 citation statements)
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“…population that evolved resistance to imazethapyr (Tuesca & Nisensohn, 2001). Similarly, index of resistance (IR) of 65 was determined based on biomass reduction, for Amaranthus quitensis H.B.K.…”
Section: Resultsmentioning
confidence: 99%
“…population that evolved resistance to imazethapyr (Tuesca & Nisensohn, 2001). Similarly, index of resistance (IR) of 65 was determined based on biomass reduction, for Amaranthus quitensis H.B.K.…”
Section: Resultsmentioning
confidence: 99%
“…In Argentina, it is a common weed in current cropping systems that has biotypes known to be susceptible to glyphosate [3]. However, the weed has been cited as being resistant to ALS inhibitors [4] and to glyphosate [5]. Recently, lack of control with auxinic herbicides was also observed by technicians and farmers in Argentina.…”
Section: Introductionmentioning
confidence: 99%
“…No Brasil, outras espécies do gênero já desenvolveram resistência a estes mecanismos de ação (FRANCISCHINI et al, 2014a;FRANCISCHINI et al, 2014b;CARVALHO et al, 2015;GONÇALVES NETTO et al, 2016) e, visto que a hibridização entre espécies de Amaranthus é comum (COSTEA; WHEAVER; TARDIFF, 2004), também há a possibilidade de que estes biótipos tenham adquirido tolerância por este fenômeno. Outra hipótese é a disseminação de biótipos resistentes oriundos da Argentina, país vizinho que faz fronteira com o Rio Grande do Sul, onde já foram descritos casos de resistência desta espécie a estes herbicidas (TUESCA; NISENSOHN, 2001;CAPORALE et al, 2018;PEROTTI et al, 2018).…”
Section: Experimento II -Eficiência De Herbicidas Pósemergentes No Counclassified