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Toxic and repellent effects of Baccharis salicifolia essential oil on Tribolium castaneum

Authors

  • Matías García,

    1. INTEQUI-CONICET, Departamento de Química-Facultad de Química, Bioquímica y Farmacia Universidad Nacional de San Luis. Chacabuco y Pedernera, 5700, San Luis, Argentina
    2. Laboratorio de Zoología, Departamento de Bioquímica y Ciencias Biológicas, Universidad Nacional de San Luis, Chacabuco y Pedernera, 5700 San Luis, Argentina
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  • Osvaldo J Donadel,

    1. INTEQUI-CONICET, Departamento de Química-Facultad de Química, Bioquímica y Farmacia Universidad Nacional de San Luis. Chacabuco y Pedernera, 5700, San Luis, Argentina
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  • Carlos E Ardanaz,

    1. INTEQUI-CONICET, Departamento de Química-Facultad de Química, Bioquímica y Farmacia Universidad Nacional de San Luis. Chacabuco y Pedernera, 5700, San Luis, Argentina
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  • Carlos E Tonn,

    1. INTEQUI-CONICET, Departamento de Química-Facultad de Química, Bioquímica y Farmacia Universidad Nacional de San Luis. Chacabuco y Pedernera, 5700, San Luis, Argentina
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  • Marta E Sosa

    Corresponding author
    1. Laboratorio de Zoología, Departamento de Bioquímica y Ciencias Biológicas, Universidad Nacional de San Luis, Chacabuco y Pedernera, 5700 San Luis, Argentina
    • Laboratorio de Zoología. FQByF-UNSL, Chacabuco y Pedernera, 5700 San Luis, Argentina
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Abstract

Allelochemical effects were observed when Tribolium castaneum (Herbst) adults were treated with Baccharis salicifolia (Ruiz & Pavon) Pers essential oil. The main biological activities were toxicity and repellence. Terpenes present in the essential oil were identified by GC-MS, and some authentic samples were tested to assess their activity individually. The most acutely toxic compounds after 3 days were β-pinene and pulegone. Most of the monoterpenes elicited symptoms indicative of neurotoxicity. The most repellent compound was α-terpineol. Toxic and repellent effects of chemical derivatives of the major sesquiterpene present in B salicifolia essential oil, as well as a series of monoterpenes, were evaluated in order to investigate structure-activity relationships. The reduced derivatives of the monoterpenes and sesquiterpenes were more repellent that their carbonyl analogues. In addition, unsaturation in the germacrane skeleton enhanced repellent activity. Copyright © 2005 Society of Chemical Industry

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