Defensive Secretion of a Caterpillar (Papilio)

@article{Eisner1965DefensiveSO,
  title={Defensive Secretion of a Caterpillar (Papilio)},
  author={Thomas Eisner and Yvonne C. Meinwald},
  journal={Science},
  year={1965},
  volume={150},
  pages={1733 - 1735}
}
The eversible cervical gland (osmeterium) of the caterpillar of the swallowtail butterfly, Papilio machaon, produces a secretion containing isobutyric and 2-methylbutyric acid. The gland is effective in defense against ants. Even when caterpillars were fed on one of three unbelliferous plants (fennel, carrot, parsnip) the secretion contained the same two acids. 

Defensive potential of components of the larval osmeterial secretion of papilionid butterflies against ants

ABSTRACT. Toxicity and repellency of components of larval osmeterial secretions of the Papilionidae to the ants Lasius niger and Crematogaster matsumurai were evaluated in the laboratory and in the

The osmaterial glands of the swallowtail butterfly Eurytides marcellus as a defence against natural enemies

The seasonal decline in effectiveness of osmateria in deterring natural enemies probably stems from a reduction in the importance of the predators that are repelled by osmeteria.

Chemical defense of a rove beetle (Creophilus maxillosus)

Ants are effectively fended off by the beetle and were shown in bioassays to be repelled by the four major components of the secretion (II, III, X, VE); the principal component (VE) was the most active.

Soldier bug predation on swallowtail caterpillars (Lepidoptera: Papilionidae): Circumvention of defensive chemistry

It is demonstrated that the pentatomid Podisus maculiventris, an important predator of the black swallowtail Papilio polyxenes, is capable of piercing the body wall of the caterpillar and consuming body fluids without eliciting osmeterial eversion.

Isobutyric acid from the Brindley's glands of Triatoma lecticularia.

The contents of the Brindley's gland of Triatoma lecticularia (Stål) have been identified by gas chromatography-mass spectrometry as isobutyric acid, and this compound is suggested to play a role as a defensive pheromone and for intraspecies communication.

Aristolochic acids fromThottea spp. (Aristolochiaceae) and the osmeterial secretions of Thottea-feeding troidine swallowtail larvae (Papilionidae)

Larvae of two Malaysian troidine swallowtail butterflies that fed on Thottea leaves were found to sequester corresponding aristolochic acid analogs in the osmeterial glands.
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