Associação de glyphosate e imidazolinonas no controle de arroz-vermelho em arroz Clearfield®

Menezes, Valmir Gaedke; Mariot, Carlos Henrique Paim; Kalsing, Augusto; Freitas, Thais Fernanda Stella de; Grohs, Daniel Santos; Matzenbacher, Felipe de Oliveira

doi:10.1590/s0103-84782013001200006

Cited by 7 publications

(7 citation statements)

References 11 publications

(7 reference statements)

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“…Their density levels were 1.8 and 2.8 plants m -2 , respectively. The most economically damaging weed in the majority of the regions composing the Rio Grande do Sul irrigated rice agro-industrial sector is the weedy rice (Oryza sativa) (Menezes et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

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Weed Phytosociological Survey in Irrigated Rice

2018

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-The phytosociological method helps evaluate the vegetation composition. The objective of this study was to identify and quantify the main weed species present in irrigated rice. The phytosociological survey was carried out in three mainly rice monoculture, Clearfield ® technology using properties in Itaqui-RS, between 2013 and 2014. For each property and period, a ½ ha representative area was selected and 10 random samples were collected, using a quadrat square of 1 m 2 . The sample colletion was conducted in two periods of time: during the irrigated rice crop initial growth and during the cereal's pre-harvesting phase. All collected plants were identified and counted, allowing for their frequency, relative frequency, density, relative density, abundance, relative abundance, relative importance index and similarity index to be calculated. Eleven weed species belonging to five families were identified. Poaceae and Cyperaceae occurred more frequently. During the initial growth of rice, the Poaceae family presented the largest index of relative importance, mainly to Echinochloa crus-galli, Echinochloa colona and Digitaria horizontalis. Overall, there was a reduction in plant density in the pre-harvest period. However, Echinochloa colona and Oryza sativa occurred in density levels that may interfere with the cereal yield. Aeschynomene denticulata, Cyperus iria and Oryza sativa are not controlled efficiently, indicating possible cases of herbicide resistance. Our conclusions emphasize the importance of correct weed species identification for the management of Echinochloa colona and Cyperus ferax. Integrated management practices are necessary for efficient weed control, avoiding productivity loss in the region's flooded rice fields. Keywords

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Section: Resultsmentioning

confidence: 99%

“…This technology uses imidazolinone resistant rice genotypes, aiming mainly at the handling and control of weed rice (Menezes et al, 2013). Property 1 is characterized by the growth of rice/rice and Property 2 by rice/fallow.…”

Section: Methodsmentioning

confidence: 99%

Weed Phytosociological Survey in Irrigated Rice

2018

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“…The presence of weeds in irrigated rice crops is one of the main factors that limits productivity (AGOSTINETTO et al, 2010. Weed species that cause the most considerable productivity losses include weedy rice (Oryza sativa) (MENEZES et al, 2013) and barnyard grass (Echinochloa spp.) (AGOSTINETTO et al 2010).…”

Section: Introductionmentioning

confidence: 99%

“…The use of rice genotypes resistant to imidazolinone herbicides (Clearfield ® System) provides an efficient alternative for the selective control of weedy rice and other species associated with rice cultivation (MARCHESAN et al, 2011;SOUSA;BACARIN;PINTO, 2012;MENEZES et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Efeito Da Aplicação De Herbicidas Supostamente Antagônicos Sobre Plantas De Arroz Suscetíveis a Inibidores Da Enzima Accase

et al. 2020

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O controle do arroz-daninho tem sido foco de pesquisas na área de herbologia. Contudo, a ocorrência de fluxo gênico do arroz Clearfield (CL) para a espécie daninha tem resultado em perda na eficiencia do sistema de produção CL. Uma nova cultivar de arroz, resistente a herbicidas inibidores da ACCase, será lançada no mercado e se constitui em mais uma ferramenta para o manejo do arroz-daninho em lavouras de arroz irrigado. Aliada a essa ferramenta, existe a necessidade de aumento no espectro dos tratamentos herbicidas para o controle da diversidade de espécies de plantas daninhas infestantes nas lavouras de arroz irirgado. O objetivo deste estudo foi elucidar o efeito de herbicidas latifolicidas na ação graminicida do quizalofop sobre o arroz cultivado como planta indicadora na simulação de arroz-daninho. Foi realizado um experimento, em casa de vegetação na Epagri-Estação Experimental de Itajaí (SC). Os resultados obtidos indicam que houve redução da eficiência de controle do arroz em todas as doses avaliadas das associações de quizalofop com 2,4-D.

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“…The flooded rice fields in the RS state are divided into six production regions based on agro-environmental factors such as climate, soil characteristics, and crop management. There are well-defined differences among these regions for air temperature, soil drainage, and fertility (Cruz, 2010), and other environmental characteristics that influence the feasibility of the adoption of agronomic practices, as well as weed management strategies applied to red rice control (Menezes et al, 2013). It was hypothesized that there may be differences between rice production regions, for the evolution of IMI-R red rice in rice fields of the RS state, and that these differences impair the evolution of herbicide resistance.…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal evolution of imidazolinone-resitant red rice in 'Clearfield' rice cultivations

Kalsing¹,

Goulart

Mariot

et al. 2019

Pesq. agropec. bras.

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The objective of this work was to evaluate the distribution of imidazolinone-resistant (IMI-R) red rice (Oryza sativa) populations, the frequency of alleles conferring resistance to IMI, and the adoption of agronomic practices applied to red rice control, across growing seasons and production regions of the state of Rio Grande do Sul (RS), Brazil. In the experiment, 1,008 red rice populations were screened for resistance to IMI, 760 IMI-R red rice plants were genotyped for the acetolactate synthase (ALS) alleles conferring resistance to IMI, and 40 'Clearfield' rice growers were surveyed. IMI-R red rice populations were widespread throughout RS since the 2006/2007 growing season, with a higher initial frequency in the Depressão Central and Fronteira Sul production regions. The occurrence of IMI-R red rice ranged from 1.6 to 3.5 years after 'Clearfield' rice release. Gly654Glu was the most frequent ALS mutation in IMI-R red rice populations, which shows a gene flow from the most used 'Clearfield' rice cultivars to the red rice plants. Crop rotation systems and certified seed were used by only 30% of the surveyed growers of 'Clearfield' rice, with lower percentages in the production regions where IMI-R red rice appeared faster.

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Associação de glyphosate e imidazolinonas no controle de arroz-vermelho em arroz Clearfield®

Abstract: RESUMO O objetivo do presente trabalho foi o de avaliar os efeitos da utilização de glyphosate e herbicidas imidazolinonas, em aplicações isoladas ou associadas 2007/08, in Cachoeirinha, RS, Brazil, using a

Cited by 7 publications

References 11 publications

Weed Phytosociological Survey in Irrigated Rice

Weed Phytosociological Survey in Irrigated Rice

Efeito Da Aplicação De Herbicidas Supostamente Antagônicos Sobre Plantas De Arroz Suscetíveis a Inibidores Da Enzima Accase

Spatial and temporal evolution of imidazolinone-resitant red rice in 'Clearfield' rice cultivations

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