FUMIGATION TOXICITY OF ESSENTIAL OILS AGAINST Rhyzopertha dominica (F.) IN STORED MAIZE GRAIN

Authors

  • Valdeany Núbia de Souza Universidade Federal Rural de Pernambuco - UFRPE Unidade Acadêmica de Serra Talhada - UAST Avenida Gregório Ferraz Nogueira, S/N José Tomé de Souza Ramos CEP 56909-535, Serra Talhada - PE
  • Carlos Romero Ferreira de Oliveira Universidade Federal Rural de Pernambuco - UFRPE Unidade Acadêmica de Serra Talhada - UAST Avenida Gregório Ferraz Nogueira, S/N José Tomé de Souza Ramos CEP 56909-535, Serra Talhada - PE
  • Cláudia Helena Cysneiros Matos Universidade Federal Rural de Pernambuco - UFRPE Unidade Acadêmica de Serra Talhada - UAST Avenida Gregório Ferraz Nogueira, S/N José Tomé de Souza Ramos CEP 56909-535, Serra Talhada - PE
  • Daiany Keila Florentino de Almeida Universidade Federal Rural de Pernambuco - UFRPE Unidade Acadêmica de Serra Talhada - UAST Avenida Gregório Ferraz Nogueira, S/N José Tomé de Souza Ramos CEP 56909-535, Serra Talhada - PE

DOI:

https://doi.org/10.1590/1983-21252016v29n220rc

Keywords:

Botanical insecticides. Fumigant effect. Bostrichidae. Stored grains.

Abstract

The Rhyzopertha dominica F. (Coleoptera: Bostrichidae) is a primary pest of stored grains in many regions of the world. In this work we evaluated the fumigant activity of essential oils of Ocimum basilicum L., Citrus aurantium L., Mentha spicata L. and Croton pulegiodorus Baill on adult R. dominica in stored maize. Tests were conducted to determine lethals concentrations (CL50 and CL100) and mortality (fumigation).The fumigation test was done in containers made of glass containing 10 individuals of R. dominica, where essential oils were applied at different concentrations: O. basilicum and M. spicata (5, 10, 15, 20, 30 and 40µL/L of air), C. aurantium (10, 20, 30, 40, 50 and 60µL/L of air) and C. pulegiodorus (0, 20, 30, 50, 70 and 90µL/L of air). After 48 hours of exposure to the oils the percentage of insect mortality was evaluated. According to LC50 and LC100 the toxicity of essential oils decreased in the following order: O. basilicum> M. spicata> C. pulegiodorus> C. aurantium. The essential oil of O. basilicum exhibited strong fumigant toxicity against R. dominica adults, with a LC50 value of 17.67 µL/L air and LC100 value of 27.15 µL/L air. The C. aurantium essential oil required higher concentrations than O. basilicum, M. spicata and C. pulegiodorus to kill insects. However, all oils evaluated presented fumigating property to promote the control of R. dominica and demonstrated potential use in the management of this coleoptera.

Author Biography

  • Valdeany Núbia de Souza, Universidade Federal Rural de Pernambuco - UFRPE Unidade Acadêmica de Serra Talhada - UAST Avenida Gregório Ferraz Nogueira, S/N José Tomé de Souza Ramos CEP 56909-535, Serra Talhada - PE
    Parte da Dissertação de Mestrado do Programa de Pós-Graduação em Produção Vegetal da UFRPE, do primeiro autor.

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Published

03-05-2016

Issue

Section

Agricultural Engineering