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Toxic and repellent effects of Baccharis salicifolia essential oil on Tribolium castaneum
Author(s) -
García Matías,
Donadel Osvaldo J,
Ardanaz Carlos E,
Tonn Carlos E,
Sosa Marta E
Publication year - 2005
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.1028
Subject(s) - pulegone , baccharis , essential oil , terpene , chemistry , degree of unsaturation , terpenoid , sesquiterpene , biology , botany , food science , traditional medicine , toxicology , asteraceae , stereochemistry , organic chemistry , medicine
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