First records of Glyphepomis adroguensis (Hemiptera, Pentatomidae) and its parasitoid, Telenomus podisi (Hymenoptera, Platygastridae), on irrigated rice fields in Rio Grande do Sul, Brazil

ABSTRACT The knowledge of the diversity and distribution of aquatic Oligochaeta (Annelida: Clitellata) species is scarce in southern Brazil. This study presents a list of the species of aquatic Oligochaeta in wetlands and irrigated rice fields in the state of Rio Grande do Sul. Collections were carried out in two large wetland remnants and seven irrigated rice fields distributed in three regions across the state. We recorded eight species from two families (Alluroididae and Naididae). We expanded the distribution ranges of two species (Brinkhurstia americana and Stylaria lacustris), which represent new records for the state of Rio Grande do Sul and registered their occurrence in non-documented environments. In specific, the present study increases to 24 species the aquatic Oligochaeta diversity for the state of Rio Grande do Sul. In addition, the spatial distribution of the species recorded suggests that rice fields support a subset of the wetland fauna of aquatic Oligochaeta. The results provide important information on the ecology and distribution of limnic Oligochaeta and are useful to inform on the diversity of this fauna in agroecosystems.

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EVAPOTRANSPIRAÇÃO DE REFERÊNCIA PELO MÉTODO DE PENMAN-MONTEITH EM ANOS DE ENOS PARA MICRORREGIÃO DE PELOTAS-RS

Irriga ◽

10.15809/irriga.2020v25n3p537-548 ◽

2020 ◽

Vol 25 (3) ◽

pp. 537-548

Author(s):

Lukas Dos Santos Boeira ◽

Michaela Bárbara Neto ◽

Lúcio De Araújo Neves ◽

Viviane Santos Silva Terra ◽

Gilberto Loguercio Collares

Keyword(s):

El Niño ◽

Reference Evapotranspiration ◽

El Nino ◽

Rio Grande ◽

Sao Paulo ◽

La Niña ◽

São Paulo ◽

Rio Grande Do Sul ◽

Irrigated Rice ◽

La Nina

EVAPOTRANSPIRAÇÃO DE REFERÊNCIA PELO MÉTODO DE PENMAN-MONTEITH EM ANOS DE ENOS PARA MICRORREGIÃO DE PELOTAS-RS LUKAS DOS SANTOS BOEIRA¹; MICHAELA BÁRBARA NETO²; LÚCIO DE ARAÚJO NEVES3; VIVIANE SANTOS SILVA TERRA4 E GILBERTO LOGUERCIO COLLARES4 1Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Rua Gomes Carneiro, n° 1, Balsa, 96010-610, Pelotas, Rio Grande do Sul, Brasil, [email protected] 2Departamento de Engenharia de Biossistemas, Universidade de São Paulo, Escola Superior de Agricultura “Luiz de Queiroz”, Av. Pádua Dias, 11, Caixa Postal 09, 13416-000, Piracicaba, São Paulo, Brasil, [email protected] 3Departamento de Solos, Instituto Federal Sul-Rio-Grandense, Campus Pelotas - Visconde da Graça, Avenida Engenheiro Ildefonso Simões Lopes, Três Vendas, 96060-290, Pelotas, Rio Grande do Sul, Brasil, [email protected] 4Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Rua Gomes Carneiro, n° 1, Balsa, 96010-610, Pelotas, Rio Grande do Sul, Brasil, [email protected]; [email protected] 1 RESUMO A Microrregião de Pelotas, localizada no Sudeste do Rio Grande do Sul é uma das maiores produtoras de arroz irrigado do Brasil. A produção de arroz na região é realizada através do sistema de irrigação por inundação. Um dos fatores que influência na altura da lâmina d'água no sistema é a evapotranspiração, a qual está diretamente relacionada aos elementos e fenômenos climáticos. O El Niño Oscilação Sul (ENOS) é um dos principais fenômenos climáticos na região. O objetivo do estudo foi avaliar se a evapotranspiração de referência (ET0) é afetada pelos períodos de ENOS na Microrregião de Pelotas-RS. Para isso, foram utilizados quarenta anos de dados climáticos diários na estimativa da ET0, pelo método de Penman-Monteith, parametrizado pela FAO, sendo confrontados com a classificação do NOAA, para o fenômeno ENOS. Os resultados mostram que a região possui em média uma ET0 de 4,82 mm dia-1, sendo para os períodos de El Niño 4,71 mm dia-1, La Niña 4,89 mm dia-1 e Neutros de 4,87 mm dia-1. A partir da análise da variância e do teste de comparação de médias DMS de Fisher, foi verificado que o ENOS exerce influência significativa na ET0 da região nos meses de novembro e dezembro. Palavras-chave: variáveis climatológicas, El Niño, La Niña, Neutros, arroz irrigado. BOEIRA, L. S.; NETO, M. B.; NEVES, L. A.; TERRA, V. S. S.; COLLARES, G. L. REFERENCE EVAPOTRANSPIRATION BY THE PENMAN-MONTEITH’S METHOD IN YEARS OF ENSO FOR THE MICROREGION OF PELOTAS-RS. 2 ABSTRACT The Micro-zone of Pelotas, located in the southeast of 'Rio Grande do Sul' is one of the major producers of irrigated rice in Brazil. Rice production in the region is performed through the flood irrigation system. One of the factors that influence the depth of water into the system is evapotranspiration, which is directly related to elements and climatic phenomena. The El Niño-Southern Oscillation (ENSO) is one of the main climatic phenomena in the region. The study aimed to assess whether the reference evapotranspiration (ET0) is affected by the ENSO's periods in the Microregion of Pelotas-RS. For such, forty years of daily climatic data were used to estimate ET0 by applying Penman-Monteith's method parameterized by FAO, then the results were confronted to NOAA's classification for the ENSO's phenomenon. The results showed that the region has an evapotranspiration average of 4.82 mm day-1 and for El Niño's periods 4.71 mm day-1, La Niña's 4.89 mm day-1 and Neutral of 4.87 mm day-1. From the variance analysis and the test of average comparison LSD by Fisher, it was noted that ENOS has significant influence on the region's ET0 in November and December. Keywords: climatological variables, El Niño, La Niña, Neutral, irrigated rice.

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Diversification of Crops and Conservation Management in Lowland Soils of Rio Grande do Sul

Journal of Agricultural Science ◽

10.5539/jas.v11n12p1 ◽

2019 ◽

Vol 11 (12) ◽

pp. 1 ◽

Cited By ~ 1

Author(s):

Cristian Troyjack ◽

João R. Pimentel ◽

Vinícius J. Szareski ◽

Ivan R. Carvalho ◽

Francine Lautenchleger ◽

...

Keyword(s):

Physical State ◽

Conservation Management ◽

Rio Grande ◽

Crop Diversification ◽

Rio Grande Do Sul ◽

Red Rice ◽

Irrigated Rice ◽

The Cost ◽

Over Time ◽

Livestock System

The lowland soils in Rio Grande do Sul occupy an area of approximately 5.4 million hectares of the state. They are flat to mildly hilly topography soils, developed, under varied conditions of drainage deficiency (hydromorphism). In this ecosystem, the extensive productive livestock system and irrigated rice were developed, used successfully for many decades. However, its characteristics and peculiarities have contributed to the cost of production, disseminate weed seeds in the crops and degrade the physical state of the lowland soils, due to this, the interest arose for the use of new alternatives that were, at the same time, efficient in the control of red rice, economically viable and able to maintain or even recover soil quality. The search for practices capable of increasing the productivity of irrigated rice and, especially, its sustainability over time has been the focus of several studies, so the objective of this review was to present aspects related to crop diversification and conservation management of lowland soils, mainly in relation to rotation and succession practices.

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QUALIDADE INDUSTRIAL DE GRÃOS DE ARROZ DECORRENTE DA SUPRESSÃO DA IRRIGAÇÃO E UMIDADE DE COLHEITA

Irriga ◽

10.15809/irriga.2015v20n3p587 ◽

2015 ◽

Vol 20 (3) ◽

pp. 587-601 ◽

Cited By ~ 1

Author(s):

GUILHERME PILAR LONDERO ◽

Enio Marchesan ◽

Evandro Parisotto ◽

Lucas Lopes Coelho ◽

Camille Flores Soares ◽

...

Keyword(s):

Oryza Sativa ◽

Moisture Content ◽

Rio Grande ◽

Rio Grande Do Sul ◽

Irrigated Rice ◽

Milling Quality ◽

Rice Grains ◽

Santa Maria ◽

E Mail

QUALIDADE INDUSTRIAL DE GRÃOS DE ARROZ DECORRENTE DA SUPRESSÃO DA IRRIGAÇÃO E UMIDADE DE COLHEITA GUILHERME PILAR LONDERO¹; ENIO MARCHESAN²; EVANDRO PARISOTTO³; LUCAS LOPES COELHO4, BRUNO BEHENCK ARAMBURU4; CAMILLE SOARES FLORES4 E ANELISE LENCINA DA SILVA4 1 Mestrando do Programa de Pós-Graduação em Agronomia, Universidade Federal de Santa Maria, Av. Roraima nº 1000, 97105-900, Santa Maria/RS, e-mail: [email protected];2 Professor Titular do Departamento de Fitotecnia, Universidade Federal de Santa Maria, Av. Roraima nº 1000, 97105-900, Santa Maria/RS, e-mail: [email protected];3 Desenvolvimento de Mercado, Ricetec Sementes Ltda., Rua 18 de novembro nº 341, 90240-040, Porto Alegre/RS, e-mail: [email protected]. 4 Graduando em Agronomia, Universidade Federal de Santa Maria, Av. Roraima nº 1000, 97105-900, Santa Maria/RS, e-mails: [email protected]; [email protected]; [email protected]; [email protected]. 1 RESUMO A qualidade dos grãos do arroz irrigado é fator fundamental para sua comercialização. Neste sentido, objetivou-se avaliar, com a realização do presente estudo, a qualidade industrial de grãos de dois cultivares de arroz irrigado em função de épocas de supressão da irrigação e graus de umidade à colheita. O experimento foi realizado nas safras 2011/12 e 2012/13 na área didático experimental de várzea da Universidade Federal de Santa Maria, Rio Grande do Sul. Os tratamentos foram compostos de: dois cultivares: o híbrido INOV CL e o cultivar Puitá INTA CL; quatro épocas de supressão da irrigação: 5, 15, 25 e 35 dias após a antese (DAA); e cinco graus de umidade média dos grãos na colheita: 24, 22, 20, 18 e 16%. O delineamento experimental foi de blocos ao acaso com quatro repetições por tratamento. O cultivar Puitá INTA CL apresenta superior qualidade em relação a grãos inteiros, vítreos, gessados e opacos ao híbrido INOV CL. A umidade adequada dos grãos à colheita para ambos cultivares ocorre no intervalo de 24 a 20%. A supressão de irrigação não interfere na qualidade de grãos inteiros, vítreos, opacos e gessados. Palavras-Chave: beneficiamento; grão inteiro; grão gessado; grão opaco; Oryza sativa L. LONDERO, G. P.¹; MARCHESAN, E.²; PARISOTTO, E.³; COELHO, L. L.4; ARAMBURU, B. B.4; FLORES, C. S.4; da SILVA, A. L. 4INDUSTRIAL QUALITY OF RICE GRAINS ARISING FROM THE WITHHOLDING OF IRRIGATION AND HARVEST MOISTURE 2 ABSTRACT Quality of irrigated rice grains is critical for their marketing. In this context, the study aimed to evaluate the industrial quality of two irrigated rice cultivars as a function of two times of irrigation withholding, and moisture content at harvest. The experiment was conducted during the 2011/12 and 2012/13 seasons in the experimental floodplain of the Federal University of Santa Maria, Rio Grande do Sul state, Brazil. The treatments consisted of two cultivars: hybrid INOV CL and Puitá INTA CL ; four irrigation withholding times: 5, 15, 25 and 35 days after anthesis (DAA); and five levels of mean grain moisture at harvest; 24, 22, 20, 18 and 16 %. The experimental design was randomized blocks with four replicates per treatment. The cv. Puitá INTA CL presented higher quality concerning milling, translucency, opacity and chalky grains than the cv. hybrid INOV CL. Suitable moisture content of grains at harvest for both cultivars is at the range of 24 to 20%. Irrigation withholding did not affect milling quality, translucency, opacity and chalky grains. Keywords: Processing, milling quality, chalky grain, opacity, Oryza sativa.

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Parasitismo de ovos de Tibraca limbativentris Stål (Hemiptera: Pentatomidae) em lavoura de arroz irrigado, Eldorado do Sul, RS

Arquivos do Instituto Biológico ◽

10.1590/s1808-16572013000400014 ◽

2013 ◽

Vol 80 (4) ◽

pp. 453-456 ◽

Cited By ~ 7

Author(s):

Thiago Della Nina Idalgo ◽

Josue Sant'Ana ◽

Luiza Rodrigues Redaelli ◽

Patricia Daniela da Silva Pires

Keyword(s):

Rio Grande ◽

Rio Grande Do Sul ◽

Telenomus Podisi

O percevejo-do-colmo, Tibraca limbativentris Stål (Hemiptera: Pentatomidae), é uma importante praga da cultura do arroz no Brasil. O presente trabalho objetivou registrar a ocorrência de parasitoides de ovos de T. limbativentris em lavoura de arroz irrigado, situada no município de Eldorado do Sul, Rio Grande do Sul. A área (603 m2) foi vistoriada semanalmente, de 21/01/2010 a 03/03/2010, coletando-se posturas do percevejo-do-colmo. Constatou-se somente a ocorrência de Telenomus podisi (Ashmead) (Hymenoptera: Platygastridae) como parasitoide de ovos, sendo o índice de parasitismo de 75%. Este é o primeiro registro de T. podisi em ovos do percevejo-do-colmo em lavouras de arroz no Rio Grande do Sul.

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Aeschynomene spp. Identification and Weed Management in Rice Fields in Southern Brazil

Agronomy ◽

10.3390/agronomy11030453 ◽

2021 ◽

Vol 11 (3) ◽

pp. 453

Author(s):

Matheus B Martins ◽

Dirceu Agostinetto ◽

Silvia Fogliatto ◽

Francesco Vidotto ◽

André Andres

Keyword(s):

Weed Management ◽

Chemical Control ◽

Management Practices ◽

Rice Fields ◽

Extension Agents ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Irrigated Rice ◽

Irrigation Uniformity ◽

Mature Seeds

In 2002, a survey carried out in rice paddies in the Rio Grande do Sul (RS) state reported the occurrence of nine species of jointvetch (Aeschynomene). Due to their semi-aquatic habit, some species adapted to irrigated rice fields, which led to their being considered the worst broadleaf weed in RS. Although farmers have successfully implemented weed management practices, Aeschynomene plants have reportedly escaped chemical control. This study aims to identify the species of Aeschynomene that occur in rice fields in RS and to evaluate the reasons why escapes are occurring. A survey was carried out by collecting mature seeds from individual adult plants. A questionnaire on the management practices employed in each field was administered to 54 farmers and 18 extension agents, each of whom was responsible for one of the surveyed rice fields. This survey found four species of Aeschynomene are present in rice fields in RS: A. denticulata, A. indica, A. rudis, and A. sensitiva. The results suggest that the explanation for escapes may lie in the management practices adopted by farmers, which are focused on the control of weedy grasses. Escapes are also associated with problems such as the lack of irrigation uniformity and out-of-stage, late herbicide applications.

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Resistance of Echinochloa crusgalli var. mitis to Imazapyr+Imazapic Herbicide and Alternative Control in Irrigated Rice

Planta Daninha ◽

10.1590/s0100-83582018360100028 ◽

2018 ◽

Vol 36 (0) ◽

Cited By ~ 1

Author(s):

J.F.L. BONOW ◽

F.P. LAMEGO ◽

A. ANDRES ◽

L.A. AVILA ◽

G.M. TELÓ ◽

...

Keyword(s):

Weed Management ◽

Integrated Management ◽

Rio Grande ◽

Integrated Weed Management ◽

Rio Grande Do Sul ◽

Resistance Level ◽

Irrigated Rice ◽

Plant Seeds ◽

Als Inhibitors ◽

Continuous Use

ABSTRACT: The introduction of Clearfield® system for irrigated rice production provided an effective management strategy in the selective control of weeds. However, the selection pressure caused by the continuous use of herbicides such as imazapyr+imazapic belonging to the imidazolinone chemical group, without the proper integrated management of weeds, has favored the selection of resistant accessions. The goals of this work were to confirm the resistance to ALS inhibitors in accessions of E. crusgalli var. mitis collected in rice fields of the state of Rio Grande do Sul and to evaluate the control with alternative herbicides registered for weed control. Three experiments were conducted in a greenhouse using plant seeds that survived the application of the herbicide imazapyr+imazapic, collected in irrigated rice producing regions with suspected resistance escapes. For dose-response curve study, three resistant accessions (ECH1 - Pelotas/Rio Grande do Sul, ECH27 - Arroio Grande/Rio Grande do Sul and ECH38 - Rio Grande/Rio Grande do Sul) and two susceptible accessions (ECH14 - Pelotas/Rio Grande do Sul and ECH44 - Rio Grande / Rio Grande do Sul) (factor A) and 11 doses of the herbicide imazapyr+imazapic (factor B) were selected. The results indicate that barnyardgrass resistant accessions present a high resistance level to imazapyr+imazapic. ALS inhibiting herbicides such as imazethapyr+imazapic, bispyribac-sodium and penoxsulam did not control the resistant accessions either. Integrated weed management should be adopted and alternative mechanisms of action as ACCAse (cyhalofop-butyl, profoxydim and clethodim) and EPSPS (glyphosate) inhibitors are still eficients controlling barnyardgrass ALS resistant accessions.

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Adaptability and stability of flood-irrigated rice cultivars released to the subtropical region of Brazil

Pesquisa Agropecuária Brasileira ◽

10.1590/s0100-204x2018001000007 ◽

2018 ◽

Vol 53 (10) ◽

pp. 1140-1149 ◽

Cited By ~ 1

Author(s):

Eduardo Anibele Streck ◽

Ariano Martins de Magalhães Júnior ◽

Paulo Ricardo Reis Fagundes ◽

Gabriel Almeida Aguiar ◽

Paulo Henrique Karling Facchinello ◽

...

Keyword(s):

Grain Yield ◽

Agronomic Traits ◽

Rio Grande ◽

The State ◽

High Yield ◽

Environment Interaction ◽

Rice Cultivars ◽

Rio Grande Do Sul ◽

Whole Grain ◽

Irrigated Rice

Abstract: The objective of this work was to estimate the effects of genotype x environment interaction and the genetic potential of flood-irrigated rice cultivars, released between 1972 and 2017, for the state of Rio Grande do Sul, Brazil. The experiments were carried out in the field, in all agroclimatic regions of flood-irrigated rice crop in the state, between the 2005/2006 and 2015/2016 crop years, totaling 60 environments (trials), with 1,961 experimental units. Twenty-five cultivars of irrigated rice were evaluated for the traits grain yield, plant height, days to flowering, and whole grain quality after milling. The values of adaptability and stability were estimated with the aid of mixed models. The rice cultivars BRS Pampa, BRS Pampeira, and BRSCIRAD 302 showed simultaneously high-genotypic grain yield, adaptability, stability, good agronomic traits, and good whole-grain yield after milling. 'BRSCIRAD 302' and 'BRS Pampa' show high-yield stability and can be recommended for all rice cultivation regions of Rio Grande do Sul. 'BRS Pampeira' is responsive to environmental improvements and is indicated for high-technology conditions.

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Qualidade da água da lavoura de arroz irrigado e a produtividade em função da época de drenagem

Ciência e Natura ◽

10.5902/2179460x40621 ◽

2020 ◽

Vol 42 ◽

pp. 28

Author(s):

Alicia Baumhardt Dorneles ◽

Mara Grohs ◽

Rodrigo De Moura Silveira ◽

Caren Alessandra da Rosa ◽

Alex Alan Bredow ◽

...

Keyword(s):

Electrical Conductivity ◽

Rio Grande ◽

Rio Grande Do Sul ◽

Irrigated Rice ◽

Drainage Time ◽

Quality Of Water ◽

Full Flowering ◽

The Moment ◽

Sodium Solution

The State of Rio Grande do Sul (RS) has intense water use for irrigated rice production, generating concerns regarding the quality of this water, which will be returned to the water sources at the end of the harvest. Therefore, this study aimed to evaluate the quality of water from rice fields and yield as a function of drainage time. The treatments were: T1: drainage from full flowering (R4) according to Counce et al. (2000); T2: 7 days after R4; T3: 14 days after R4; T4: 21 days after R4; T5: 28 days after R4; T6 (control): 35 days after R4. At the moment of drainage the leaf height was quantified and the water samples were then collected, where the pH, electrical conductivity, nitrogen (ammonium and nitrate), phosphorus, potassium and sodium solution in solution were quantified of grain yield. All parameters related to water quality studied are in accordance with CONAMA Resolution 357/2005. The productivity results indicate that it is possible to drain irrigated rice from 14 days after full flowering.

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Número de gerações de um percevejo e seu parasitoide e da severidade da ferrugem asiática em soja, simulados em cenários de clima e manejo no norte do RS

Ciência Rural ◽

10.1590/s0103-84782013000400002 ◽

2013 ◽

Vol 43 (4) ◽

pp. 571-578 ◽

Cited By ~ 3

Author(s):

Vanessa Vitória Chevarria ◽

Emerson Medeiros Del Ponte ◽

Simone Mundstock Jahnke

Keyword(s):

Rio Grande ◽

Phakopsora Pachyrhizi ◽

Rio Grande Do Sul ◽

Euschistus Heros ◽

Telenomus Podisi

Objetivou-se simular o número de gerações do percevejo Euschistus heros e seu parasitoide Telenomus podisi e da severidade da ferrugem causada por Phakopsora pachyrhizi na cultura da soja em função da data de semeadura, cultivar e momento de ocorrência desses organismos. A simulação foi feita em dois locais representativos de duas importantes regiões produtoras de soja no Estado do Rio Grande do Sul. Modelos bioclimáticos dos insetos e da doença foram integrados a um modelo de simulação da cultura da soja (DSSAT) e rodados para uma série temporal de dados meteorológicos diários para Passo Fundo (52 anos) e Santa Rosa (34 anos). Independente do grupo de maturação, quanto mais antecipada foi a data da semeadura e o estádio de ocorrência de E. heros na cultura, maior o número de gerações (de 2 a 3) até a maturação fisiológica da soja. Para T. podisi, um maior número de gerações (5 a 6) foi simulado para semeadura antecipada e cultivares de ciclo tardio. Para a ferrugem asiática não foram observadas tendências de redução nos níveis médios de severidade com o uso de práticas preconizadas, como plantio antecipado e cultivares de grupos mais precoces de maturação.

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