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The Repellence of Aristolochia aff. orbicularis Roots against the Corn Borer Sitophilus zeamais

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The Repellence of Aristolochia aff. orbicularis Roots against the Corn Borer Sitophilus zeamais

Joseph Rauscher

b

, Rosa M. Guille´n

a

, Martha Albores-Velasco

a,

*, Gilberto Gonza´lez

a

, Otto Vostrowsky

b

, and Hans J. Bestmann

a

a Facultad de Quı´mica, U.N.A.M. Circuito Interior C.U. O4510, Me´xico D.F., Me´xico.

Fax: (5) 6223722. E-mail: malbores@servidor.unam.mx

b Institut für Organische Chemie Universität Erlangen Nürnberg.

D-91054 Erlangen, Germany

* Author for correspondence and reprint requests

Z. Naturforsch.56 c,575Ð580 (2001); received February 6/March 20, 2001 Essential Oils,Aristolochiaaff.orbicularis,Sitophilus zeamais

The repellence of Aristolochia aff. orbicularis root, a native of Xochipala, Guerrero, Mexico, to the corn borerSitophilus zeamais(Coleoptera) was investigated. The essential oil was isolated from the aromatic root and its repellent effect was assessed. About 40 compo- nents of the oil were identified using gas chromatography-mass spectrometry and other spec- troscopic methods. The repellence of the roots, the oil and the chromatography fractions were also evaluated. Some fractions had a higher repellence than the total oil.

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