| Registro completo |
| Provedor de dados: |
PAB
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| País: |
Brazil
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| Título: |
Fipronil residual content in the soil for the control of Oryzophagus oryzae in subsequent flooded rice crops
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| Autores: |
Martins,José Francisco da Silva
Mattos,Maria Laura Turino
Silva,Fernando Felisberto da
Büttow,Germano Tessmer
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| Data: |
2017-04-01
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| Ano: |
2017
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| Palavras-chave: |
Oryza sativa
Fipronil-sulfide
Insecticide
Rice water weevil.
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| Resumo: |
Abstract: The objective of this work was to evaluate the potential of fipronil (a.i.) residual content in the soil of flooded rice fields, for the control of Oryzophagus oryzae (Coleoptera: Curculionidae) in subsequent rice cultivations. In 2010/2011, plots (25x55 m) were installed with three treatments: 30 g fipronil (a.i.) 100 kg-1 seed; mixture of 1/3 treated seed (30 g fipronil 100 kg-1 seed) with 2/3 untreated seed equivalent to 10 g fipronil (a.i.) 100 kg-1 seed; and a control without insecticide application. The plots were regrown in 2011/2012, 2012/2013, and 2013/2014 without any insecticide application. The following variables were evaluated: number of larvae and adults from standard samples of soil and roots, and grain yield. In 2011/2012 and 2012/2013, the concentrations of fipronil and of its residues in the soil of plots were evaluated by liquid chromatography and mass spectrometry, and the metabolite fipronil-sulfide (≤ 1.1 μg kg-1) was detected. In the three seasons, after the use of seeds treated with 10 and 30 g fipronil, the average larval infestation of O. oryzae was 65.2 and 96.1% lower, and the average of rice grain yield was 16.9 and 25.5% higher than in the control plot, respectively. The residual fipronil content in the soil, mainly of the highest dose, effectively controls the insect.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000400228
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| Editor: |
Embrapa Secretaria de Pesquisa e Desenvolvimento
Pesquisa Agropecuária Brasileira
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| Relação: |
10.1590/s0100-204x2017000400002
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| Formato: |
text/html
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| Fonte: |
Pesquisa Agropecuária Brasileira v.52 n.4 2017
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| Direitos: |
info:eu-repo/semantics/openAccess
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