Assessment of effectiveness of two diatomaceous earth-based commercial formulations in the control of maize weevil based on toxicological parameters

Authors

  • Leandro Prado Ribeiro Epagri/Centro de Pesquisa para Agricultura Familiar - Cepaf, Santa Catarina, Brasil
  • Maike Lovatto Engenheiro-agrônomo, Mestrando, Universidade Federal do Rio Grande do Sul (UFRGS).
  • José Djair Vendramim Departamento de Entomologia e Acarologia, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo (ESALQ/USP), Piracicaba, São Paulo, Brasil.

Keywords:

Sitophilus zeamais, inerte dusts, stored cereals, integrated pest management

Abstract

Abstract – Diatomaceous earth-based formulations (Keepdry® e Insecto®) are commercially available in Brazil and their physical characteristics can affect their toxicity and agronomic effectiveness. Thus, the aim of this study was to evaluate, based on toxicological data, the effectiveness of these commercial formulations registered and available in the Brazil market for the control of S. zeamais in stored corn. The LC50 and LC90 were estimated, respectively, in 248.75 and 360.18 ppm to Keepdry® and in 204.57 and 409.97 ppm to Insecto® without, however, occur significant difference among them. The mean lethal time (LT50) estimated also showed no difference between the two formulations in any of the tested concentrations. Thus, the two formulations may constitute promising alternatives for the preventative management of this Coleoptera pest in stored grain.

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Author Biography

Leandro Prado Ribeiro, Epagri/Centro de Pesquisa para Agricultura Familiar - Cepaf, Santa Catarina, Brasil

Engenheiro-Agrônomo pela Universidade Federal de Santa Maria (2008). Obteve, em 2011, o título de mestre em Entomologia pela Escola Superior de Agricultura "Luiz de Queiroz"/Universidade de São Paulo (ESALQ/USP) e, em 2014, o título de doutor em Entomologia pela ESALQ/USP com período sanduíche no Insect Toxicology Laboratory, Faculty of Land and Food Systems/University of British Columbia, Vancouver, Canadá. Atualmente é pesquisador (ATFS4) em Entomologia do Centro de Pesquisa para Agricultura Familiar/Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina (CEPAF/EPAGRI). (CV lattes: http://lattes.cnpq.br/3336925010648086)

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Published

2018-03-02

How to Cite

Prado Ribeiro, L., Lovatto, M., & Vendramim, J. D. (2018). Assessment of effectiveness of two diatomaceous earth-based commercial formulations in the control of maize weevil based on toxicological parameters. Agropecuária Catarinense Journal, 31(1), 56–60. Retrieved from https://publicacoes.epagri.sc.gov.br/rac/article/view/111

Issue

Vol. 31 No. 1 (2018)

Section

Scientific article

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