Tolerância de trigo (Triticum aestivum) e aveia (Avena sp.) a herbicidas inibidores da enzima acetolactato sintase (ALS)

Hartwing, I.; Bertan, Ivandro; Galon, Leandro; Noldin, José Alberto; Concenço, Germani; Silva, A.F.; Aspiazú, Ignácio; Ferreira, E.A.

doi:10.1590/s0100-83582008000200012

Cited by 14 publications

(13 citation statements)

References 19 publications

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“…However, there is a differential selectivity between species, and the genetic makeup of the species or cultivar may determine varying degrees of tolerance or susceptibility to herbicides (Hartwig et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Changes in Photosynthesis and Oxidative Stress in Wheat Plants Submmited to Herbicides Application

et al. 2016

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-The use of herbicides, even in tolerant crops, can cause stress evidenced by increase phytotoxicity affecting growth and development. The objectives of this study were to evaluate herbicides effect from different mechanisms of action in photosynthetic and oxidative stress parameters, as well visual phytotoxicity and wild radish control in wheat crop, cultivar Quartzo. Two trials were conducted where the first one evaluated the photosynthetic parameters on wheat plants in two seasons collection, following the application of herbicides bentazon, clodinafop, iodosulfuron, metribuzin, metsulfuron and 2,4-D; and the second one evaluated wild radish (Raphanus sativus) control, wheat phytotoxicity and yield due to bentazon, iodosulfuron, metribuzin, metsulfuron and 2,4-D herbicides application. Photosynthetic rate, stomatal conductance and transpiration were negatively affected by metribuzin, metsulfuron and 2,4-D herbicides at 24 and 120 HAS (hours after spraying) compared to control. Oxidative stress was similar or lower to control, when herbicide was applied and, in general, there was no difference between application times. Lipid peroxidation, catalase activity and phenols were higher in the first collection time. The application of herbicides iodosulfuron and 2,4-D reduces chlorophylls and carotenoids in wheat. Herbicides bentazon, iodosulfuron, metribuzin, metsulfuron and 2,4-D are selective to wheat, cultivar Quartzo and do not affect wheat yield. 2,4-D, metribuzin and iodosulfuron are more efficient for wild radish control. Keywords

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Section: Introductionmentioning

confidence: 99%

Changes in Photosynthesis and Oxidative Stress in Wheat Plants Submmited to Herbicides Application

et al. 2016

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“…Esse herbicida proporcionou redução de MMSPA relativa superior a 60%, demonstrando não ser seletivo à cultura. A sensibilidade de aveia branca a imazethapyr já foi relatada em outros trabalhos (HARTWIG et al, 2008 ) causaram maior intoxicação em relação às doses X (Tabela 3), reduzindo a produção de MMSPA (Tabela 2). Em relação ao fator principal (herbicida), para a dose X (dose indicada), exceto os herbicidas metsulfuron-methyl (2,4 g i.a.…”

Section: Resultsunclassified

“…ha ) causaram redução significativa na MSSPA em aveia comum, diferindo da testemunha e dos demais herbicidas avaliados. É importante mencionar que o herbicida metsulfuron-methyl, amplamente utilizado para controlar plantas daninhas tais como a buva em pastagens de inverno, proporcionou redução na produção de MMSPA de aveia comum em ambas as doses testadas, embora alguns trabalhos relatem a seletividade deste herbicida à cultura (HARTWIG et al, 2008;VARGAS;ROMAN, 2005 A interação entre os fatores herbicida e dose foi significativa para a variável MMSPA do azevém tetraploide (Tabela 2). Foi observada diferença entre as doses testadas apenas para os herbicidas imazetapyr e flumioxazin, sendo a maior dose destes herbicidas a mais fitotóxica (Tabelas 3 e 4).…”

Section: Resultsunclassified

“…ha -1 ), respectivamente. Do mesmo modo que para a aveia branca, os dados observados para a aveia comum corroboram com os resultados apresentados por Hartwig et al (2008), destacando a sensibilidade da cultura ao herbicida imazethapyr. A seletividade de herbicidas sobre culturas envolvendo a detoxificação por enzimas, tais como a P450 e a GST, está diretamente ligada à dose aplicada de herbicida.…”

Section: Resultsunclassified

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Herbicides with potential use in the control of hairy fleabane and their selectivity in oats and ryegrass

Dalazen

Kruse

Machado

2015

Revista Ciência Agronômica

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) e flumioxazin (50 e 100 g i.a. ha -1 ), além da testemunha (sem herbicida). Com exceção do herbicida imazethapyr, os demais foram seletivos à aveia branca, independentemente das doses avaliadas. Os herbicidas 2,4-D, diclosulam, saflufenacil e flumioxazin foram seletivos à cultura da aveia comum, quando aplicados na menor dose avaliada, sendo alternativas para o manejo de buva durante o inverno. O herbicida metsulfuron-methyl apresentou efeito tóxico sobre o azevém comum, diminuindo a massa de matéria seca da parte aérea (MMSPA). Para o azevém tetraploide, excetuando o imazethapyr e a maior dose de flumioxazin, os demais tratamentos mostraram-se seletivos. Embora alguns tratamentos tenham proporcionado sintomas de fitointoxicação, isso não refletiu negativamente na produção de MMSPA, evidenciando a capacidade de recuperação das plantas. Palavras-chave: Conyza bonariensis. Resistência de plantas daninhas. Pastagem de inverno. Lolium multiflorum. Avena spp.ABSTRACT -The rotation of herbicides is the main method used in the prevention and management of herbicide-resistant weeds. However, in addition to being efficient, herbicides should also be crop selective. The objective of this study was to evaluate the selectivity of herbicides with potential use in the control of hairy fleabane, to white oats, common oats, common ryegrass and tetraploid ryegrass. The experiments were arranged in a randomised-block design, in a bi-factorial scheme, with factor A comprising the herbicides, and factor B the herbicide doses X and 2X, where X is the recommended dose of the active ingredient (a.i.). The treatments to be evaluated were: 2,4-D amine (806 and 1,612 g a.i. ha ), as well as the control (no herbicide). Except for the herbicide imazethapyr, the other herbicides were selective to white oats, regardless of the dose. The herbicides 2,4-D, diclosulam, saflufenacil and flumioxazin were selective to common oats when applied at the lowest dose tested, being alternatives in the management of hairy fleabane during the winter. The herbicide metsulfuron-methyl had a toxic effect on common ryegrass, reducing shoot dry matter weight (SDW). Except for imazethapyr and the highest dose of flumioxazin, the remaining treatments were selective to tetraploid ryegrass. Although some treatments produced symptoms of phytotoxicity, this did not reflect negatively on the production of SDW, demonstrating the resilience of the plants.

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“…Over the last three decades, the effectiveness in controlling weeds in the main crops with agronomic importance in Brazil has progressed due to the selectivity of herbicides to the crops (Hartwig et al, 2008), which is a measure of the different responses of crop and weed tolerance to an herbicide treatment (Oliveira Jr. e Inoue, 2011). Some factors, such as application period, dose, phenological stage of the crop, environmental conditions, position of the product in relation to the crop seeds or genetic tolerance of the species may interfere in the selectivity to the different herbicides (Oliveira Jr. and Inoue, 2011).…”

Section: Introductionmentioning

confidence: 99%

Seletividade do flumioxazin ao trigo

et al. 2017

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-The chemical control of weeds is an important management to keep high productivity in the wheat crop. Due to the scarceness of registered products for the crop, the goal of this work was to evaluate the selectivity of the flumioxazin herbicide to wheat, applied in post-emergence. The experiment was conducted on the field and the used experimental design was the randomized block one, with four replications. The treatments were applied on stage V3 of the wheat crop and consisted in six flumioxazin doses: 0, 10, 20, 30, 40, 50 g ha -1 . Evaluations were performed on SPAD index, intoxication and weed control on day 15, 21, 28 and 35 after application. At the end of the experiment, 109 days after seeding, plants were tracked to determine the one thousand grain weight, hectoliter weight and grain productivity. The obtained results showed that in spite of causing an up to 20% SPAD index and up to 34% intoxication reduction in the highest applied dose, flumioxazin provided selectivity to the wheat crop, since it did not interfere in the other evaluated variables, mainly in grain productivity. Keywords: doses; herbicide; productivity; Triticum aestivum Resumo -O controle químico de plantas daninhas é um importante manejo para se manter a alta produtividade na cultura do trigo. Devido à escassez de produtos registrados para a cultura, objetivou-se avaliar a seletividade do herbicida flumioxazin ao trigo, aplicado em pós-emergência. O experimento foi realizado a campo e o delineamento experimental utilizado foi de blocos ao acaso, com quatro repetições. Os tratamentos foram aplicados no estádio V3 da cultura do trigo e consistiram de seis doses de flumioxazin: 0, 10, 20, 30, 40, 50 g ha -1 . Foram realizadas avaliações de índice SPAD, de intoxicação e de controle de plantas daninhas aos 15, 21, 28 e 35 dias após a aplicação. Ao final do experimento, 109 dias após a semeadura, as plantas foram trilhadas para determinação do peso de mil grãos, peso hectolitro e produtividade de grãos. Os resultados obtidos mostraram que apesar de causar redução do índice SPAD de até 20% e intoxicação de até 34% na maior dose aplicada, o flumioxazin proporcionou seletividade à cultura do trigo por não interferir nas demais variáveis avaliadas, principalmente na produtividade de grãos.

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Tolerância de trigo (Triticum aestivum) e aveia (Avena sp.) a herbicidas inibidores da enzima acetolactato sintase (ALS)

Cited by 14 publications

References 19 publications

Changes in Photosynthesis and Oxidative Stress in Wheat Plants Submmited to Herbicides Application

Changes in Photosynthesis and Oxidative Stress in Wheat Plants Submmited to Herbicides Application

Herbicides with potential use in the control of hairy fleabane and their selectivity in oats and ryegrass

Seletividade do flumioxazin ao trigo

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