Competição inicial entre Cyperus esculentus e arroz irrigado em condições de casa-de-vegetação

Erasmo, Eduardo Andrea Lemus; Pinto, Luana Patrícia; Terra, Marcelo Alves; Didonet, Julcemar; Peluzio, J. M.

doi:10.1590/s0100-83582000000200012

Cited by 3 publications

(2 citation statements)

References 2 publications

(2 reference statements)

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“…are up to 48% (Oerke et al, 1994). This interference can negatively impact the number of tillers, reducing from 13% to 27% in rice plants when in competition with Cyperus esculentus L. (Erasmo et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Low-level resistance of Cyperus iria L. to ALS-inhibiting herbicides occurring in the State of Rio Grande do Sul

Spatt¹,

Dornelles²,

Sanchotene³

et al. 2016

Científica

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This work aimed at determining possible resistance of three biotypes of Cyperus iria to inhibiting herbicides of acetolactate synthase enzyme (ALS). An experiment at greenhouse was conducted out where suspected resistance biotypes were multiplied through seeds in pots filled with soil. The treatments were arranged in a trifactorial (AxBxC) design, where factor A consisted of three biotypes of Cyperus iria, from three locations of the state of Rio Grande do Sul (named Santa Maria 1, São Borja 3 and Cachoeira do Sul 7). Factor B corresponds to three herbicides (pyrazosulfuron-ethyl, ethoxysulfuron and bentazon). Factor C refers to herbicide doses (zero, 50% of registered dose; registered dose, two, four and eight times registered dose of herbicides). For resistance measurement, it was used resistance factor calculation (RF) and for dose-response curves through regression analysis, RF on dry mass (DM) of plants. It was observed that São Borja 3 and Cachoeira do Sul 7 biotypes have a low resistance factor (1 < RF < 10) to pyrazosulfuron-ethyl and ethoxysulfuron herbicides. These showed lower susceptibility to ethoxysulfuron (RF = 5.49-6.76) than pyrazosulfuron-ethyl (RF = 2.21-2.47). The clear distinction in the susceptibility of biotypes, include responses of chemical control to field due to the long period of use of ethoxysulfuron herbicide. It is concluded that this factor characterizes low-level resistance, being a cross-resistance type, thus demonstrating the ineffectiveness of ALS-inhibiting herbicides to control this species.

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Section: Introductionmentioning

confidence: 99%

Low-level resistance of Cyperus iria L. to ALS-inhibiting herbicides occurring in the State of Rio Grande do Sul

Spatt¹,

Dornelles²,

Sanchotene³

et al. 2016

Científica

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“…Efeitos significativos foram constatados na redução da área foliar, bem como no menor acúmulo de matéria seca por planta em decorrência da redução do número de perfilhos. Dados semelhantes foram verificados porErasmo et al (2000) na fase inicial de competição entre C. esculentus e arroz irrigado em casa de vegetação, com redução de 27% da área foliar das plantas de arroz, numa…”

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Efeito da densidade e dos períodos de convivência de Cyperus esculentus na cultura do arroz irrigado

Erasmo

Costa²,

Pinheiro³

et al. 2003

Planta daninha

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. A matéria seca, a área foliar e o número de perfilhos por plantas de arroz foram afetados pela presença das plantas daninhas em todos os períodos de convivência, porém a área foliar foi a característica mais influenciada. (15, 25, 35, 45, 60 days after emergence Palavras-chave: interferência, Cyperus, período de competição. ABSTRACT -This work aimed to analyze the competitive effect of Cyperus esculentus on the initial development of irrigated rice. The field experiment was carried out at the Experimental Station of the University of Tocantins, in Formoso do

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Cyperus esculentus (yellow nutsedge)

Rojas‐Sandoval¹,

Acevedo‐Rodríguez²

2022

CABI Compendium

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Competição inicial entre Cyperus esculentus e arroz irrigado em condições de casa-de-vegetação

Cited by 3 publications

References 2 publications

Low-level resistance of Cyperus iria L. to ALS-inhibiting herbicides occurring in the State of Rio Grande do Sul

Low-level resistance of Cyperus iria L. to ALS-inhibiting herbicides occurring in the State of Rio Grande do Sul

Efeito da densidade e dos períodos de convivência de Cyperus esculentus na cultura do arroz irrigado

Cyperus esculentus (yellow nutsedge)

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