Consulta: subjectFacets:"Cyperus esculentus"
Registros recuperados: 5
Data/hora: 11/06/2024 08:03:31

Initial growth and competitive ability of yellow nutsedge and irrigated rice
Provedor de dados: Planta Daninha
Autores: Westendorff,N.R.; Agostinetto,D.; Ulguim,A.R.; Langaro,A.C.; Thürmer,L.
Weeds cause significant reduction in the irrigated rice crop yield. Cyperus esculentus (yellow nutsedge) is adapted to irrigate environment. Information on the competitive ability of the weed to the culture, and their environmental adaptation, are scarce. In this study, we sought to determine the initial growth and competitive ability of yellow nutsedge and irrigated rice, as a function of cultivar growth cycle. Initial growth and competition studies were conducted in a randomized complete design in a greenhouse in the agricultural year 2010/11. For the initial growth study, the treatments consisted of a factorial combination of a biotype of yellow nutsedge and two rice cultivars in the function of the vegetative cycle (BRS Querência: early cycle - IRGA...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cyperus esculentus; Oryza sativa; Competition; Fitness.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000400007

Resistance Mapping of the Genus Cyperus in Rio Grande do Sul and Selection Pressure Analysis
Provedor de dados: Planta Daninha
Autores: ULGUIM,A.R.; SILVA,B.M.; AGOSTINETTO,D.; AVILA NETO,R.C.; ZANDONÁ,R.R.
ABSTRACT: Among the species of the genus Cyperus occurring in paddy rice, C. esculentus, C. difformis and C. iria are the most important, and the latter two are reported as resistant to herbicides in Rio Grande do Sul (RS). The aim of this work was to characterize and mapping the occurrence of resistant plants of the genus Cyperus in areas of paddy rice in RS State, and to analyze the agronomic factors that interfere in the resistance selection. Seeds from individual plants were harvested in the 2014/15 crop, characterized as control failures by the application of acetolactate synthase inhibitors (ALS), totaling 43 samples. At the time of collection, the grower was inquired on aspects related to the management of weeds in the crop. Seeds were germinated in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acetolactate synthase; Cyperus esculentus; C. iria; C. difformis; Irrigated rice.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100254

Épocas de aplicação de penoxsulam e de início da irrigação no arroz irrigado
Provedor de dados: Planta Daninha
Autores: Agostinetto,D.; Panozzo,L.E.; Moraes,P.V.D.; Dal Magro,T.; Tarouco,C.P.; Oliveira,C.; Rubin,R.
O arroz irrigado está sujeito à interferência causada por fatores bióticos e abióticos; entre os primeiros, as plantas daninhas são as principais responsáveis pela redução na produtividade, interferindo diretamente nos componentes do rendimento do cereal. Objetivou-se avaliar o efeito de épocas de início de irrigação por inundação, época de aplicação e doses de penoxsulam sobre os componentes da produtividade de grãos de arroz irrigado, cultivar Qualimax 1. O experimento foi instalado em campo, em delineamento experimental de blocos ao acaso com parcelas subsubdivididas e quatro repetições. Nas parcelas alocaram-se as épocas de aplicação (precoce e tardia) do herbicida penoxsulam; nas subparcelas, as épocas de início da irrigação (1, 15 e 30 dias após a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cyperus esculentus; Controle químico; Echinochloa sp.; Oryza sativa.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582011000200018

Periods of interference by Cyperus esculentus L. in Pennisetum purpureum Schum
Provedor de dados: Acta Agronómica
Autores: Brighenti,Alexandre Magno; Oliveira,Maurílio Fernandes.
Abstract Interference from weeds directly affects the productivity and the quality of elephant grass (Pennisetum purpureum) fodder. The difficulty in controlling weed species is one of the primary limitations to the production and use of elephant grass as forage in dairy farming and for biomass production in energy generation. The objective of this study was to determine the different periods in which yellow nutsedge (Cyperus esculentus) interfered with elephant grass forage yield. Two field experiments were conducted using a randomized complete block design with four replicates in Valenga, Rio de Janeiro State, Brazil. Elephant grass and weeds were maintained together for increasing periods of time: 0, 14, 28, 42, 56 and 70 days after planting (DAP)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cyperus esculentus; Elephant grass; Forage; Napier grass; Pennisetum purpureum; Yellow nutsedge; Weeds.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000400512

Yield loss and economic thresholds of yellow nutsedge in irrigated rice as a function of the onset of flood irrigation
Provedor de dados: Bragantia
Autores: Westendorff,Nixon da Rosa; Agostinetto,Dirceu; Ulguim,André da Rosa; Perboni,Lais Tessari; Silva,Bruno Moncks da.
Yellow nutsedge (Cyperus esculentus) is adapted to flooding and reduces yield in irrigated rice. Information on the competitive ability of this weed with the crop and the size of the economic damage caused is lacking. Mathematical models quantify the damage to crops and support control decision-making. This study aimed to determine yield losses and economic thresholds (ET) of this weed in the culture according to weed population and time of onset of irrigation of the crop. The field study was conducted in the agricultural year of 2010/2011 in Pelotas/RS to evaluate the competitive ability of BRS Querência in competition with different population levels of yellow nutsedge and two periods of onset of flood irrigation (14 and 21 days after emergence). The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cyperus esculentus; Oryza sativa; Rectangular hyperbole.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052014000100005