The chemical nature of the defensive larval secretion of the citrus swallowtail, Papilio demodocus

Burger B.V. ; Roth M. ; Roux M.l. ; Spies H.S.C. ; Truter V. ; Geertsema H. (1978)


The eversible cervical gland or osmeterium of the larva of the African citrus swallowtail, Papilio demodocus Esper, produces a secretion containing isobutyric acid and 2-methyl-butyric acid as well as small quantities of the methyl and ethyl esters of these acids. The secretion of final instar larvae was found to differ from that of younger larvae. © 1978.

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