African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6576

Full Length Research Paper

Effects of Schinus terebinthifolius extracts on the control of Sitophilus species in stored wheat grains

Patrícia Carine Hüller Goergen
  • Patrícia Carine Hüller Goergen
  • Department of Plant Breeding, Federal University of Santa Maria, Avenue Roraima 1000, Santa Maria, RS, Brazil.
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Cleusa Adriane Menegassi Bianchi Krüger
  • Cleusa Adriane Menegassi Bianchi Krüger
  • Department of Agrarian Studies, Regional Northwest University of Rio Grande do Sul, Comércio Street, number 3000, Ijuí, RS, Brazil.
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Vidica Bianchi
  • Vidica Bianchi
  • Department of Life Sciences, Regional Northwest University of Rio Grande do Sul, Comércio Street, number 3000, Ijuí, RS, Brazil.
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Isledi William da Silva
  • Isledi William da Silva
  • Department of Agrarian Studies, Regional Northwest University of Rio Grande do Sul, Comércio Street, number 3000, Ijuí, RS, Brazil.
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Ilaine Teresinha Seibel Gehrke
  • Ilaine Teresinha Seibel Gehrke
  • Department of Life Sciences, Regional Northwest University of Rio Grande do Sul, Comércio Street, number 3000, Ijuí, RS, Brazil.
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Jéssyca Banderia Corrêa
  • Jéssyca Banderia Corrêa
  • Department of Life Sciences, Regional Northwest University of Rio Grande do Sul, Comércio Street, number 3000, Ijuí, RS, Brazil.
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José Antonio Gonzalez da Silva
  • José Antonio Gonzalez da Silva
  • Department of Agrarian Studies, Regional Northwest University of Rio Grande do Sul, Comércio Street, number 3000, Ijuí, RS, Brazil.
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  •  Received: 27 July 2017
  •  Accepted: 21 September 2017
  •  Published: 21 December 2017

Abstract

The objective of this study is to evaluate the efficacy of Schinus terebinthifolius extract in controlling the insects of stored wheat. The experimental design was completely randomized with 10 replicates in a factorial scheme of 4 × 9, for extracts (control, aqueous extract, and hydro alcoholic extract of 5 and 15% of Brazilian pepper tree) and nine dates of evaluation (3, 6, 9, 16, 23, 30, 37, 44 and 51 days) after application. Ten weevil insects were inoculated into 200 g of wheat seed by applying 2 ml of each treatment. There is a control effect on the emergence and adults of Sitophilus species in wheat stored using S. terebinthifolius extracts. Up to the first nine days of storage, the hydro alcoholic extract (15%) has a relative efficacy of 35%. At 9 and 16 days of evaluation, hydro alcoholic extracts (5 and 15%) presented relative efficacy of 40%. At 44 and 51 days of evaluation, the aqueous extract shows relative efficacy of 40 to 60%. The aqueous extract appears to have an effect on the larvae and oviposition of the weevil observed by efficacy at 44 and 51 days. Hydro alcoholic extracts, on the other hand, show greater control over adults with efficacy until the 7th date.

Key words: Triticum aestivum L, storage, weevil, insecticidal action, Brazilian pepper