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Molecules 2016, 21(3), 258; doi:10.3390/molecules21030258

Typical Monoterpenes as Insecticides and Repellents against Stored Grain Pests

1
Unidade de Biotecnologia, Universidade de Ribeirão Preto, Ribeirão Preto, São Paulo 14096-900, Brazil
2
Instituto Federal de Educação, Ciência e Tecnologia de São Paulo (IFSP), Barretos, São Paulo 14781-502, Brazil
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editors: John A. Beutler and Derek J. McPhee
Received: 19 October 2015 / Accepted: 4 November 2015 / Published: 23 February 2016
(This article belongs to the Section Natural Products)
View Full-Text   |   Download PDF [1158 KB, uploaded 23 February 2016]   |  

Abstract

Five monoterpenes naturally occurring in essential oils were tested for their insecticidal and repellent activities against the bruchid beetle Callosobruchus maculatus and the maize weevil Sitophilus zeamais. The monoterpenes were highly efficient as inducers of mortality or repellency against both insect species. They were more efficient in their fumigant activity against C. maculatus than against S. zeamais, while this profile of action was inverted when considering the repellent activities. Eugenol was one the most effective fumigants against both insects and one the most effective repellent against C. maculatus, while citronellal and geranial were one the most effective repellents against S. zeamais. Functional and positional isomerism of the monoterpenes pairs appears to exert little or no influence on theirs effects, especially in case of repellency. The validation of the insecticidal/repellent efficacy of isolated monoterpenes may permit a more advantageous, rapid, economic and optimized approach to the identification of promising oils for commercial formulations when combined with ethnobotanical strategies. View Full-Text
Keywords: essential oils; Callosobruchus maculatus; fumigant; pest management; Sitophilus zeamais essential oils; Callosobruchus maculatus; fumigant; pest management; Sitophilus zeamais
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Reis, S.L.; Mantello, A.G.; Macedo, J.M.; Gelfuso, E.A.; da Silva, C.P.; Fachin, A.L.; Cardoso, A.M.; Beleboni, R.O. Typical Monoterpenes as Insecticides and Repellents against Stored Grain Pests. Molecules 2016, 21, 258.

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