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Chemical deterrency of Citrus reticulata (Blanco) to the leaf-cutting ant, Acromyrmex octospinosus (Reich)

Published online by Cambridge University Press:  19 September 2011

V. Jones ,
G. V. Pollard  and
C. E. Seaforth
V. Jones
Affiliation:
Department of Plant Science and Biochemistry, The University of the West Indies, St. Augustine, Trinidad, W.I.
G. V. Pollard
Affiliation:
Department of Plant Science and Biochemistry, The University of the West Indies, St. Augustine, Trinidad, W.I.
C. E. Seaforth
Affiliation:
Department of Chemistry, The University of the West Indies, St. Augustine, Trinidad, W.I.
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Abstract

The mandarin orange or portugal, Citrus reticulata (Blanco), is unattractive as a forage material for the leaf-cutting ant, Acromyrmex octospinosus (Reich) while pineapple orange, Citrus sinensis (L.), is quite attractive. Lipid and non-lipid components were separated from portugal whole leaf extracts. Bioassays revealed the lipid fraction to be less attractive to the ants. This fraction was further separated using preparative layer chromatography into polar and non-polar lipid constituents. Two non-polar lipid fractions, Rf 0.5–0.7 and Rf 0.7–1.0, were shown to be the most deterrent constituents of portugal leaves to A. octospinosus.

Résumé

Le mandarinier, Citrus reticulata (Blanco), n'offre pas de matériel fourrager attrayant pour la fourmi-parasol, Acromyrmex octospinosus (Reich), tandis que l'oranger (variété ananas), Citrus sinensis est très attrayant. Des composants lipidiques et non lipidiques ont été séparés d'extraits de feuilles entières de mandarinier. Des épreuves biologiques ont révélées que la fraction lipidique était moins attrayante pour les fourmis. En outre, utilisant la Chromatographie en couche fine, cette fraction a été séparée en éléments polaires et non polaires. On a démontré que deux fractions de lipidiques non polaires, Rf 0,5–0,7 et Rf 0,7–1,0, étaient les constituants des feuiles de mandarinier les plus préventifs contre A. octospinosus.

Keywords

Citrus reticulatamandarin or portugalleaf-cutting antsAcromyrmex octospinosusplant selectivitychemical deterrentsCitrus reticulatale mandarinierla fourmi-parasolAcromyrmex octospinosusselectivite des plantesresistance chimique
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 8 , Issue 1 , February 1987 , pp. 99 - 102
Copyright
Copyright © ICIPE 1987

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