CONTACT TOXICITY OF ESSENTIAL OIL OF Croton pulegiodorus BAILL ON Sitophilus zeamais MOTSCHULSKY

Authors

  • Patryck Érmerson Monteiro dos Santos Academic Unit of Serra Talhada, Universidade Federal Rural de Pernambuco, Serra Talhada, PE http://orcid.org/0000-0001-9526-2465
  • Antonielson Bezerra da Silva Academic Unit of Serra Talhada, Universidade Federal Rural de Pernambuco, Serra Talhada, PE http://orcid.org/0000-0001-7798-4077
  • Cilene Rejane Inácio de Magalhães Lira Department of Biochemistry, Universidade Federal de Pernambuco, Recife, PE http://orcid.org/0000-0003-4873-7442
  • Cláudia Helena Cysneiros Matos Academic Unit of Serra Talhada, Universidade Federal Rural de Pernambuco, Serra Talhada, PE http://orcid.org/0000-0001-5040-2479
  • Carlos Romero Ferreira de Oliveira Academic Unit of Serra Talhada, Universidade Federal Rural de Pernambuco, Serra Talhada, PE http://orcid.org/0000-0001-8250-6344

DOI:

https://doi.org/10.1590/1983-21252019v32n205rc

Keywords:

Botanical insecticides. Euphorbiaceae. Maize storage. Curculionidae.

Abstract

The objective of this work was to evaluate the contact toxicity of essential oil of Croton pulegiodorus Baill on six populations of Sitophilus zeamais Motschulsky. The S. zeamais populations used were from Crixás-GO, Espírito Santo do Pinhal-SP, Juiz de Fora-MG, Picos-PI, Serra Talhada-PE, and Vicentina-MS, Brazil, and present different susceptibility to synthetic insecticides. The essential oil of C. pulegiodorus used was obtained from plants collected in Triunfo-PE, Brazil. The lethal concentrations (LC50 and LC90), toxicity ratio of the essential oil, and the resistance ratio of the populations were estimated. The S. zeamais population from Serra Talhada-PE presented the lowest LC50 (4.21 μL 20 g-1) and LC90                   (6.67 μL 20 g-1), and was the reference for susceptibility to the essential oil of C. pulegiodorus. The S. zeamais population from Espírito Santo do Pinhal-SP presented the highest LC50 (6.02 μL 20 g-1) and LC90                       (10.55 μL 20 g-1), and was the reference for tolerance to the essential oil of C. pulegiodorus. The toxicity ratio ranged from 1.01 (Picos-PI) to 1.43 (Serra Talhada-PE); and the resistance ratio ranged from 1.13 (Crixás-GO) to 1.43 (Espírito Santo do Pinhal-SP). The essential oil of C. pulegiodorus reduced the emergence of adult S. zemais and showed residual effect, with contact toxicity, after 30 and 60 days of application.

Downloads

Download data is not yet available.

Downloads

Published

16-05-2019

Issue

Section

Agronomy