Manejo na entressafra do arroz com herbicidas pré-emergentes para controle de arroz-daninho e redução do banco de sementes
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Manancial - Repositório Digital da UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/31608 |
Resumo: | Weedy rice (Oryza sativa L.) is the most important weed in irrigated rice crop, being one of the main factors limiting cereal productivity in Rio Grande do Sul (RS), Brazil. One of the main management methods for this weed is the Clearfield® cultivation system, which allows for both pre- and post-emergence management of the crop, due to the tolerance of cultivars to herbicides from the imidazolinone chemical group. However, there are currently weedy rice biotypes resistant to these herbicides, necessitating the adoption of other management practices to adhere to the principles of integrated weed management. An alternative is autumnal management using pre-emergent herbicides to reduce the seed bank in the soil. However, as it is of the same species as cultivated rice, it is important to evaluate the impacts of using these herbicides on crop development. Thus, the objective of this study was to determine the effect of pre-emergent herbicide use in autumnal management on the control and reduction of the weedy rice seed bank. Field experiments were conducted in a randomized complete block design with four replications in a commercial rice production area during the 2021/22 and 2022/23 growing seasons in Dom Pedrito, RS, Brazil. The scheme used was factorial, with factor A consisting of different herbicide application times, referred to as June, July, and August, corresponding to 100, 78, and 47 days, and 42, 26, and 10 days before rice sowing for the agricultural years 2021/22 and 2022/23, respectively. Factor B consisted of the herbicides s-metolachlor (1440 g a.i. ha-1 ), sulfentrazone + diuron (210 and 420 g a.i. ha-1 ), piroxasulfone (170 g a.i. ha-1 ), and flumioxazin (50 g a.i. ha-1 ), in addition to the control (no application). The evaluated variables were control (%), number of plants (m2 ) at crop pre-harvest, number of full, viable, and non-viable wild rice seeds m-2 in the soil, as well as crop injury (%) and grain yield (kg ha-1 ). The herbicides showed control values below 25%, and low reduction of the seed bank in the soil, being considered ineffective in this application modality. The herbicides s-metolachlor, sulfentrazone + diuron, and flumioxazin exhibited the highest injury values; however, they did not significantly affect crop productivity. Thus, when applied before rice sowing, the herbicides s-metolachlor, sulfentrazone + diuron, pyroxasulfone, and flumioxazin do not provide satisfactory control and do not significantly reduce the wild rice seed bank. |
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Manejo na entressafra do arroz com herbicidas pré-emergentes para controle de arroz-daninho e redução do banco de sementesOff-season management of rice with pre-emergent herbicides to control weedy rice and reduce the seed bankOryza sativa (L.)Manejo integrado de plantas daninhasS-metolachlorSulfentrazone + diuronPyroxasulfoneFlumioxazinIntegrated weed managementCNPQ::CIENCIAS AGRARIAS::AGRONOMIAWeedy rice (Oryza sativa L.) is the most important weed in irrigated rice crop, being one of the main factors limiting cereal productivity in Rio Grande do Sul (RS), Brazil. One of the main management methods for this weed is the Clearfield® cultivation system, which allows for both pre- and post-emergence management of the crop, due to the tolerance of cultivars to herbicides from the imidazolinone chemical group. However, there are currently weedy rice biotypes resistant to these herbicides, necessitating the adoption of other management practices to adhere to the principles of integrated weed management. An alternative is autumnal management using pre-emergent herbicides to reduce the seed bank in the soil. However, as it is of the same species as cultivated rice, it is important to evaluate the impacts of using these herbicides on crop development. Thus, the objective of this study was to determine the effect of pre-emergent herbicide use in autumnal management on the control and reduction of the weedy rice seed bank. Field experiments were conducted in a randomized complete block design with four replications in a commercial rice production area during the 2021/22 and 2022/23 growing seasons in Dom Pedrito, RS, Brazil. The scheme used was factorial, with factor A consisting of different herbicide application times, referred to as June, July, and August, corresponding to 100, 78, and 47 days, and 42, 26, and 10 days before rice sowing for the agricultural years 2021/22 and 2022/23, respectively. Factor B consisted of the herbicides s-metolachlor (1440 g a.i. ha-1 ), sulfentrazone + diuron (210 and 420 g a.i. ha-1 ), piroxasulfone (170 g a.i. ha-1 ), and flumioxazin (50 g a.i. ha-1 ), in addition to the control (no application). The evaluated variables were control (%), number of plants (m2 ) at crop pre-harvest, number of full, viable, and non-viable wild rice seeds m-2 in the soil, as well as crop injury (%) and grain yield (kg ha-1 ). The herbicides showed control values below 25%, and low reduction of the seed bank in the soil, being considered ineffective in this application modality. The herbicides s-metolachlor, sulfentrazone + diuron, and flumioxazin exhibited the highest injury values; however, they did not significantly affect crop productivity. Thus, when applied before rice sowing, the herbicides s-metolachlor, sulfentrazone + diuron, pyroxasulfone, and flumioxazin do not provide satisfactory control and do not significantly reduce the wild rice seed bank.O arroz-daninho (Oryza sativa L.) é a planta daninha de maior importância na cultura do arroz irrigado, sendo um dos principais fatores que limitam a produtividade do cereal no Rio Grande do Sul (RS). Uma das principais formas de manejo dessa planta daninha, é o sistema de cultivo Clearfield®, o qual possibilita o manejo em pré e pós-emergência da cultura, devido a tolerância das cultivares aos herbicidas do grupo químico das imidazolinonas. Entretanto, atualmente há biótipos de arroz-daninho com resistência a esses herbicidas, sendo necessário que outras práticas de manejo sejam adotadas para atender aos princípios do manejo integrado de plantas daninhas. Uma alternativa é o manejo outonal utilizando herbicidas pré-emergentes para redução do banco de sementes no solo. Todavia, por ser da mesma espécie do arroz cultivado, é importante avaliar os impactos do uso desses herbicidas no desenvolvimento da cultura. Desse modo, o objetivo do trabalho foi determinar o efeito do uso de herbicidas pré-emergentes no manejo outonal no controle e redução do banco de sementes de arroz-daninho. Foi realizado experimento no campo em delineamento experimental de blocos casualizados com quatro repetições, em área comercial de produção de arroz nas safras agrícolas 2021/22 e 2022/23, no município de Dom Pedrito (RS). O esquema utilizado foi fatorial, cujo fator A consistiu em diferentes épocas de aplicação dos herbicidas, sendo denominadas de junho, julho e agosto, que se referem a 100, 78, 47 dias e 42, 26 e 10 dias antes da semeadura do arroz, para os anos agrícolas 2021/22 e 2022/23, respectivamente. O fator B constou dos herbicidas s-metolachlor (1440 g i.a. ha-1 ), sulfentrazone + diuron (210 e 420 g i.a. ha-1 ), piroxasulfone (170 g i.a. ha-1 ) e flumioxazin (50 g i.a. ha-1 ), além da testemunha (sem aplicação). As variáveis avaliadas foram o controle (%), o número de plantas (m2 ) na pré-colheita da cultura, número de sementes cheias, viáveis e inviáveis de arroz-daninho m-2 no solo, além da fitotoxicidade (%) à cultura e a produtividade de grãos (kg ha-1 ). Os herbicidas apresentaram valores de controle abaixo de 25%, e baixa redução do banco de sementes no solo, sendo considerados não eficazes nessa modalidade de aplicação. Os herbicidas s-metolaclhor, sulfentrazone + diuron e flumioxazin apresentaram os maiores valores de fitotoxicidade, entretanto não afetaram de modo significativo a produtividade da cultura. Desse modo, os herbicidas s-metolachlor, sulfentrazone + diuron, pyroxasulfone e flumioxazin, quando aplicados antes da semeadura do arroz, não apresentam controle satisfatório e não reduzem significativamente o banco de sementes do arroz-daninho.Universidade Federal de Santa MariaBrasilAgronomiaUFSMPrograma de Pós-Graduação em AgronomiaCentro de Ciências RuraisUlguim, André da Rosahttp://lattes.cnpq.br/8885152893126479Zanon, Alencar JúniorDornelles, Sylvio Henrique BidelTeló, Gustavo MackLucas, Tilio Adan2024-03-05T15:20:59Z2024-03-05T15:20:59Z2023-12-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://repositorio.ufsm.br/handle/1/31608porAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM2024-03-05T15:22:32Zoai:repositorio.ufsm.br:1/31608Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2024-03-05T15:22:32Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
Manejo na entressafra do arroz com herbicidas pré-emergentes para controle de arroz-daninho e redução do banco de sementes Off-season management of rice with pre-emergent herbicides to control weedy rice and reduce the seed bank |
title |
Manejo na entressafra do arroz com herbicidas pré-emergentes para controle de arroz-daninho e redução do banco de sementes |
spellingShingle |
Manejo na entressafra do arroz com herbicidas pré-emergentes para controle de arroz-daninho e redução do banco de sementes Lucas, Tilio Adan Oryza sativa (L.) Manejo integrado de plantas daninhas S-metolachlor Sulfentrazone + diuron Pyroxasulfone Flumioxazin Integrated weed management CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
title_short |
Manejo na entressafra do arroz com herbicidas pré-emergentes para controle de arroz-daninho e redução do banco de sementes |
title_full |
Manejo na entressafra do arroz com herbicidas pré-emergentes para controle de arroz-daninho e redução do banco de sementes |
title_fullStr |
Manejo na entressafra do arroz com herbicidas pré-emergentes para controle de arroz-daninho e redução do banco de sementes |
title_full_unstemmed |
Manejo na entressafra do arroz com herbicidas pré-emergentes para controle de arroz-daninho e redução do banco de sementes |
title_sort |
Manejo na entressafra do arroz com herbicidas pré-emergentes para controle de arroz-daninho e redução do banco de sementes |
author |
Lucas, Tilio Adan |
author_facet |
Lucas, Tilio Adan |
author_role |
author |
dc.contributor.none.fl_str_mv |
Ulguim, André da Rosa http://lattes.cnpq.br/8885152893126479 Zanon, Alencar Júnior Dornelles, Sylvio Henrique Bidel Teló, Gustavo Mack |
dc.contributor.author.fl_str_mv |
Lucas, Tilio Adan |
dc.subject.por.fl_str_mv |
Oryza sativa (L.) Manejo integrado de plantas daninhas S-metolachlor Sulfentrazone + diuron Pyroxasulfone Flumioxazin Integrated weed management CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
topic |
Oryza sativa (L.) Manejo integrado de plantas daninhas S-metolachlor Sulfentrazone + diuron Pyroxasulfone Flumioxazin Integrated weed management CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
description |
Weedy rice (Oryza sativa L.) is the most important weed in irrigated rice crop, being one of the main factors limiting cereal productivity in Rio Grande do Sul (RS), Brazil. One of the main management methods for this weed is the Clearfield® cultivation system, which allows for both pre- and post-emergence management of the crop, due to the tolerance of cultivars to herbicides from the imidazolinone chemical group. However, there are currently weedy rice biotypes resistant to these herbicides, necessitating the adoption of other management practices to adhere to the principles of integrated weed management. An alternative is autumnal management using pre-emergent herbicides to reduce the seed bank in the soil. However, as it is of the same species as cultivated rice, it is important to evaluate the impacts of using these herbicides on crop development. Thus, the objective of this study was to determine the effect of pre-emergent herbicide use in autumnal management on the control and reduction of the weedy rice seed bank. Field experiments were conducted in a randomized complete block design with four replications in a commercial rice production area during the 2021/22 and 2022/23 growing seasons in Dom Pedrito, RS, Brazil. The scheme used was factorial, with factor A consisting of different herbicide application times, referred to as June, July, and August, corresponding to 100, 78, and 47 days, and 42, 26, and 10 days before rice sowing for the agricultural years 2021/22 and 2022/23, respectively. Factor B consisted of the herbicides s-metolachlor (1440 g a.i. ha-1 ), sulfentrazone + diuron (210 and 420 g a.i. ha-1 ), piroxasulfone (170 g a.i. ha-1 ), and flumioxazin (50 g a.i. ha-1 ), in addition to the control (no application). The evaluated variables were control (%), number of plants (m2 ) at crop pre-harvest, number of full, viable, and non-viable wild rice seeds m-2 in the soil, as well as crop injury (%) and grain yield (kg ha-1 ). The herbicides showed control values below 25%, and low reduction of the seed bank in the soil, being considered ineffective in this application modality. The herbicides s-metolachlor, sulfentrazone + diuron, and flumioxazin exhibited the highest injury values; however, they did not significantly affect crop productivity. Thus, when applied before rice sowing, the herbicides s-metolachlor, sulfentrazone + diuron, pyroxasulfone, and flumioxazin do not provide satisfactory control and do not significantly reduce the wild rice seed bank. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-12-15 2024-03-05T15:20:59Z 2024-03-05T15:20:59Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/31608 |
url |
http://repositorio.ufsm.br/handle/1/31608 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Brasil Agronomia UFSM Programa de Pós-Graduação em Agronomia Centro de Ciências Rurais |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Brasil Agronomia UFSM Programa de Pós-Graduação em Agronomia Centro de Ciências Rurais |
dc.source.none.fl_str_mv |
reponame:Manancial - Repositório Digital da UFSM instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Manancial - Repositório Digital da UFSM |
collection |
Manancial - Repositório Digital da UFSM |
repository.name.fl_str_mv |
Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
atendimento.sib@ufsm.br||tedebc@gmail.com |
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1805922105163776000 |