Resistência de Eleusine indica aos inibidores de ACCase

Vidal, Ribas Antônio; Portes, Emerson da Silva; Lamego, Fabiane Pinto; Trezzi, Michelangelo Müzell

doi:10.1590/s0100-83582006000100021

Cited by 24 publications

(21 citation statements)

References 13 publications

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“…Constatou-se que, na maior parte das lavouras amostradas, a dose de glifosato utilizada, tanto para a dessecação pré-semeadura (67%) (Figura 2 B) como para as aplicações em pós-emergência (54%), encontra-se entre 720 e 1.080 g ha -1 do e.a. Nohatto (2010) (Vidal et al, 2006), o que aponta para o risco de resistência caso haja alta pressão de seleção. O glufosinato de amônio pode ser considerado uma alternativa interessante para uso em rotação de culturas, visto que há disponível, no mercado, genótipos de milho geneticamente modificado para resistência a este herbicida.…”

Section: Resultsunclassified

Manejo de capim pé-de-galinha em lavouras de soja transgênica resistente ao glifosato

Ulguim

Várgas

Agostinetto

et al. 2013

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar a resistência de capim pé-de-galinha (Eleusine indica) ao glifosato, em lavouras de soja transgênica; avaliar o efeito de aplicações de glifosato em diferentes estádios de desenvolvimento; identificar práticas agronômicas associadas à seleção de biótipos resistentes; e avaliar a eficiência dos herbicidas cletodim, fluazifope-P-butílico, clomazona, glufosinato de amônio e glifosato nas plantas resistentes. Plantas escapes ao tratamento com glifosato foram coletadas em 24 propriedades, no Rio Grande do Sul. As plantas foram cultivadas em casa de vegetação, tendo-se avaliado a sua resistência ao glifosato. Os acessos resistentes foram selecionados e avaliados quanto ao efeito da aplicação do glifosato em diferentes estádios de crescimento e quanto à sensibilidade aos herbicidas. Foi aplicado um questionário aos produtores para identificação das práticas agronômicas associadas às falhas no controle. O controle de E. indica pelo glifosato é mais efetivo com a aplicação em estádios iniciais de desenvolvimento. Práticas agronômicas, como uso contínuo de baixas doses do herbicida, aplicação em estádios de desenvolvimento avançados das plantas daninhas (mais de um afilho) e a ausência de rotação de culturas foram relacionadas às falhas de controle observadas. Os herbicidas cletodim, fluazifope-P-butílico e glufosinato de amônio são alternativas eficientes para o controle de E. indica.Termos para indexação: Eleusine indica, Glycine max, dosagem, eficiência de controle, estádio fenológico, resistência ao glifosato, roundup ready. Management of goose grass on transgenic soybean, resistant to glyphosateAbstract -The objective of this work was to evaluate the resistance of goose grass (Eleusine indica) to glyphosate application in transgenic soybean crops; evaluate the effect of glyphosate applications in different growth stages; identify the main agronomic practices associated with the selection of resistant biotypes; and evaluate the effect of the herbicides clethodim, fluazifop-p-butyl, clomazone, glufosinate ammonium, and glyphosate on resistant plants. Plants that survived glyphosate application were collected on 24 properties in the state of Rio Grande do Sul, Brazil. Plants were grown in greenhouse and their resistance to glyphosate was evaluated. The resistant accessions were selected and evaluated as to the effect of glyphosate application on different growth stages and to their sensitivity to the herbicides. A questionnaire was given to producers in order to identify agronomic practices associated with control failures. The control of E. indica by glyphosate is more effective at initial growth stages. Agronomic practices, such as continued use of low doses of glyphosate, application on advanced weed growth stages (more than one tiller), and absence of crop rotation were related to the observed control failures. The herbicides clethodim, fluazifop-p-butyl, and glufosinate ammonium are efficient alternatives to control E. indica.

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Section: Resultsunclassified

Manejo de capim pé-de-galinha em lavouras de soja transgênica resistente ao glifosato

Ulguim

Várgas

Agostinetto

et al. 2013

Pesq. agropec. bras.

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“…However, it is important to remember that goosegrass resistance to this mechanism of action has been previously reported in Brazil (Vidal et al, 2006), which shows that the continuous application of graminicides may not be effective in all situations. Alternatively, other mechanisms of action may exhibit effectiveness in controlling these populations, such as GS-GOGAT inhibitors, carotenoid synthesis inhibitors (Ulguim et al, 2013), cell division inhibitors, and photosystem I inhibitors (Molin et al, 2013).…”

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confidence: 98%

Goosegrass Resistant to Glyphosate in Brazil

et al. 2017

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-Several cases of herbicide resistance in goosegrass have been confirmed worldwide. Reports of control failures after glyphosate application have been observed, especially in the Midwest region of Paraná State. The objective of this study was to evaluate the existence of goosegrass populations resistant to glyphosate. For this, 25 populations collected in two consecutive seasons (2013/ 2014 and 2014/2015) were sown and grown in greenhouse. Glyphosate dose-response curve experiments were performed using doses of 0, 60, 120, 240, 480, 960, 1,920, 3,840, 7,680 and 15,360 g a.e. ha -1 . The application stages were from two to three tillers (E1) for the populations of 2013/2014 and E1 and five to six tillers (E2) for the populations of 2014/2015. Furthermore, three of the populations supposedly considered resistant in these experiments (populations 7, 19 and 25) have had their F1 submitted to the herbicide dose-response test in order to verify whether the resistance was inheritable. With the results obtained in this study, it was concluded that the populations 19 and 25, from Campo Mourão and Luziânia (Midwest of Paraná) are the first confirmed cases of goosegrass resistant to glyphosate in Brazil (RF = 3.99 to 6.81), following all the criteria for confirmation of new weed resistance cases. (2013/2014 e 2014/2015) foram semeadas e cultivadas em casa de vegetação. Experimentos de curva de dose-resposta de glyphosate foram realizados utilizando-se as doses de 0, 60, 120, 240, 480, 960, 1.920, 3.840, 7.680 e 15.360 g e.a. ha -1 Keywords: Eleusine indica, dose-response, application timming, resistance factor. RESUMO -Diversos casos de resistência de capim-pé-de-galinha têm

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“…The resistance factor (RF) was calculated by dividing the C 50 of the resistant biotype by the C 50 of the susceptible biotype (Vidal et al, 2006). The resistance was confirmed when RF>1.0 (Saari et al, 1994) and the C 80 was higher than the herbicide maximum recommended rate (Christoffoleti et al, 2009).…”

Section: Methodsmentioning

confidence: 99%

Barnyardgrass with Multiple Resistance to Synthetic Auxin, ALS and Accase Inhibitors

et al. 2016

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-The objective of this research was to confirm the resistance of a barnyardgrass biotype (Echinochloa crus-galli) to herbicides quinclorac (synthetic auxin), penoxsulam (ALS inhibitor) and cyhalofop-butyl (ACCase inhibitor). Two experiments were carried out in a greenhouse located in Itajaí, State of Santa Catarina, Brazil. One experiment evaluating the biotype ECH 18 (known as susceptible) and one with the ECH 141 biotype (suspected to be multiple resistant). The experimental design used was completely randomized, in a 4 x 7 factorial arrangement with four replications. The first factor was the herbicide: cyhalofopbutyl (Clincher ® ), penoxsulam (Ricer ® ), quinclorac (Facet ® ) and propanil (Grassaid ® ) and the second factor consisting of seven rates of each herbicide (0.00; 0.25; 0.50; 1; 2; 4 and 8 times the label rate). The evaluations of percentage of control, plant density per pot and dry mass of shoots were performed 35 days after treatments. The rates to control 50% and 80% and the dose to provide 50% and 80% of the weed biomass accumulation and the resistance factor were estimated based on data analysis. The initial hypothesis was confirmed; the biotype ECH 141 presented multiple resistance (synthetic auxin, ALS and ACCase inhibitor). However, the herbicide propanil controlled biotype ECH 141 adequate.Keywords: Paddy rice, Echinochloa crus-galli, chemical control, herbicide resistance. (0,00, 0,25, 0,50, 1,00, 2,00, 4,00 RESUMO -Este estudo teve como objetivo confirmar a resistência múltipla de um biótipo de capimarroz (Echinochloa crus-galli) aos herbicidas auxínicos (quinclorac), inibidores da ALS (penoxsulam) e ACCase (cyhalofop-butyl). Foram conduzidos dois experimentos em casa de vegetação localizada no município de Itajaí/SC: um com o biótipo ECH 18 (sabidamente suscetível) e outro com o biótipo ECH 141 (com suspeita de resistência múltipla). O delineamento experimental utilizado foi o inteiramente casualizado (DIC), organizado em arranjo fatorial 4 x 7, com quatro repetições. O primeiro fator avaliado foram os herbicidas: cyhalofop-butyl, penoxsulam, quinclorac e propanil (Clincher ® , Ricer ® , Facet ® e Grassaid ® , respectivamente). O segundo fator consistiu de sete doses de cada herbicida

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Resistência de Eleusine indica aos inibidores de ACCase

Cited by 24 publications

References 13 publications

Manejo de capim pé-de-galinha em lavouras de soja transgênica resistente ao glifosato

Manejo de capim pé-de-galinha em lavouras de soja transgênica resistente ao glifosato

Goosegrass Resistant to Glyphosate in Brazil

Barnyardgrass with Multiple Resistance to Synthetic Auxin, ALS and Accase Inhibitors

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