Host-plant chemistry influences oviposition choice of the spicebush swallowtail butterfly

Citation
M. Carter et P. Feeny, Host-plant chemistry influences oviposition choice of the spicebush swallowtail butterfly, J CHEM ECOL, 25(9), 1999, pp. 1999-2009
Citations number
26
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
JOURNAL OF CHEMICAL ECOLOGY
ISSN journal
0098-0331 → ACNP
Volume
25
Issue
9
Year of publication
1999
Pages
1999 - 2009
Database
ISI
SICI code
0098-0331(199909)25:9<1999:HCIOCO>2.0.ZU;2-7
Abstract
The spicebush swallowtail, Papilio troilus (L.), lays its eggs on plants in the family Lauraceae. Sassafras [Sassafras albidum (Nutt.) Nees], spicebus h [Lindera benzoin (L.) Spreng.], redbay (Persea borbonia (L.)] and camphor tree [Cinnamomum camphora (Nees) Eberm.] are four of its known host plants. in one-choice tests, free-flying spicebush swallowtail females laid eggs o n chemical extracts of the leaves of each of these four hosts. In two-choic e experiments, females always preferred to oviposit on an extract of sassaf ras compared to extracts of the other three hosts. It was shown for spicebu sh extract that this response was not due to oviposition experience. Previo usly we had identified one of the host plant chemicals acting as an oviposi tion stimulant in sassafras extract as 3-caffeoyl-muco-quinic acid (3-CmQA) . Extracts of the other three hosts did nor contain this compound. The addi tion of 3-CmQA alone to spicebush extract did not increase oviposition acti vity. It did, however, increase discrimination between hosts and nonhosts. When a fraction of sassafras extract containing 3-CmQA and other synergisti c stimulants was added to spicebush extract, preference for sassafras extra ct was no longer recorded. These results show existing differences in ovipo sition chemistry among host plants of the spicebush swallowtail and how the se differences can influence oviposition choice in bioassay experiments.