Role of Trail Pheromone in Foraging and Processionary Behavior of Pine Processionary Caterpillars Thaumetopoea pityocampa

Abstract

Although caterpillars of Thaumetopoea pityocampa may mark their pathways with silk, this study shows that the material is essential to neither the elicitation nor maintenance of trail-following or processionary behavior. Trail following is dependent upon a pheromone the caterpillars deposit by brushing the ventral surfaces of the tips of their abdomens against the substrate. Earlier instars are strongly bound to their trail system; in the laboratory, caterpillars followed circular trails continuously for as long as 12 hr before breaking away from them. The trail pheromone is long-lived and soluble in nonpolar solvents, but its volatilization or degradation allows the caterpillars to distinguish new from aged trails. In contrast to trail following, processionary behavior, the head-to-tail, single-file movement of the caterpillars is dependent on neither silk nor the trail pheromone. Stimuli associated with setae found on the tip of the abdomen of the precedent caterpillar serve to hold processions together, and such stimuli take priority over those associated with either the trail pheromone or silk. Although the caterpillars discern trail strength and choose stronger over weaker trails, the trail marking system of the processionary caterpillar appears less sophisticated than those of other, previously studied species of social caterpillars, and colonies are relatively inefficient in abandoning exhausted feeding sites in favor of new food finds. In laboratory studies, females were more likely to lead processions than males, and leaders, regardless of gender, expended more energy in locomotion than followers.

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References

  1. Brindley, H. H. 1910. Further notes on the procession of Cnethocampa pinivora. Proc. Cambridge Phil. Soc. 15:576–587.

    Google Scholar 

  2. Costa, J. T., Fitzgerald, T. D., and Janzen, D. H. 2002. Trail-following and natural history of the social caterpillar of Arsenura armida in Costa Rica (Lepidoptera: Saturniidae:Arsenurinae). Tropical Lepidoptera. In press.

  3. Dajoz, R. 2000. Insects and Forests. The Role and Diversity of Insects in the Forest Environment. Lavoisier Publishing, Paris.

    Google Scholar 

  4. Demolin, G. 1962. Comportement des chenilles de Thaumetopoea pityocampa au cours des processions de nymphose. C. R. Acad. Sci. 254:733–744.

    Google Scholar 

  5. Demolin, G. 1971. Incidences de quelques facteurs agissant sur le comportment social des chenilles de Thaumetopoea pityocampa Schiff. (Lepidoptera) pendant la période des processions de nymphose. Répercussion sur l'efficacité des parasites. Ann. Zool. Ecol. Anim., no. hors série, pp. 33–56.

  6. Ducombs, G., Lamy, M., Mollard, S., Guillard, J. M., and Maleville, J. 1981. Contact dermatitis from processional pine caterpillar (Thaumetopoea pityocampa Schiff., Lepidoptera). Contact Derm. 7:287–288.

    Google Scholar 

  7. Edgerly, J. S. and Fitzgerald, T. D. 1982. An investigation of behavioral variability within colonies of the eastern tent caterpillar Malacosoma americanum (Lepidoptera: Lasiocampidae). J. Kans. Entomol. Soc. 55:145–155.

    Google Scholar 

  8. Edwards, T. G. 1910. On the procession and pupation of the larva of Cnethocampa pinivora. Proc. Cambridge Phil. Soc. 15:431–436.

    Google Scholar 

  9. Fabre, J. H. 1898. Souvenirs Entomologiques, Sér. 6:298–392.

    Google Scholar 

  10. Fabre, J. H. 1916. The Life of the Caterpillar. Dodd, Mead and Co., New York.

    Google Scholar 

  11. Fitzgerald, T. D. 1993. Trail and arena marking by caterpillars of Archip cerasivoranus (Lepidoptera: Tortricidae). J. Chem. Ecol. 19:1479–1489.

    Google Scholar 

  12. Fitzgerald, T. D. 1995. The Tent Caterpillars. Cornell University Press, Ithaca, New York.

    Google Scholar 

  13. Fitzgerald, T. D. and Costa, J. T. 1999. Collective behavior in social caterpillars, pp. 379–400, in C. Detrain, J. L. Deneubourg, and J. M. Pasteels (Eds.). Information Processing in Social Insects. Birkhaeuser, Basel.

    Google Scholar 

  14. Fitzgerald, T. D. and Pescador-Rubio, A. 2002. The role of tactile and chemical stimuli in the formation and maintenance of the processions of the social caterpillar Hylesia lineata (Lepidoptera: Saturniidae). J. Insect Behav. In press.

  15. Fitzgerald, T. D. and Underwood, D. L. A. 1998a. Trail marking by the larva of the madrone butterfly Eucheira socialis and the role of the trail pheromone in communal foraging behavior. J. Insect Behav. 11:247–263.

    Google Scholar 

  16. Fitzgerald, T. D. and Underwood, D. L. A. 1998b. Communal foraging behavior and recruitment communication in Gloveria sp. (Lepidoptera: Lasiocampidae). J. Chem. Ecol. 24:1381–1396.

    Google Scholar 

  17. Fitzgerald, T. D. and Underwood, D. L. 2000. Winter foraging patterns and voluntary hypothermia in the social catterpillar Eucheira socialis. Ecol. Entomol. 25:1–10.

    Google Scholar 

  18. Halperin, J. 1990. Life history of Thaumetopoea spp. (Lep., Thaumetopoeidae) in Israel. J. Appl. Entomol. 110:1–6.

    Google Scholar 

  19. Lamy, M., Pastureaud, M.-H., Novak, F., Ducombs, G., Vincendeau, P., Maleville, J., and Texier, L. 1986. Thaumetopoein: an urticating protein from the hairs an integument of the pine processionary caterpillar (Thaumetopoea pityocampa Schiff., Lepidoptera, Thaumetopoeidae). Toxicon 24:347–356.

    Google Scholar 

  20. Mills, M. B. 1951. Bag shelter caterpillars and their habits II. West. Aust. Nat. 3:84–92.

    Google Scholar 

  21. Mallmann, R. J. 1962. Observations sur les réactions tactiles de la chenille processionnaire du pin, Thaumetopoea pityocampa Schiff. Insectes Soc. 9:335–345.

    Google Scholar 

  22. Papaj, D. R. and Rausher, M. D. 1983. Individual variation in host location by phytophagous insects, pp. 77–124, in S. Ahmed, (ed.). Herbivorous Insects: Host-Seeking Behavior and Mechanisms. Academic Press, New York.

    Google Scholar 

  23. Réaumur, M. 1736. Mémoires pour l'histoire des Insectes, II. Paris.

  24. Ruf, C., Costa, J. T., and Fiedler, K. 2001. Trail-based communication in social caterpillars of Eriogaster lanestris (Lepidoptera: Lasiocampidae). J. Insect Behav. 14:231–245.

    Google Scholar 

  25. Schmidt, D. H., Koutsaftikis, A., and Breuer, M. 1990. Ein Beitrag zur Biologie und zum Feinddruck von Thaumetopoea pityocampa (Den. & Schiff.) in Griechenland (Insecta: Lepidoptera). Z. Angew. Zool. 77:395–422.

    Google Scholar 

  26. Sokal, R. R. and Rohlf, F. J. 1969. Biometry. W. H. Freeman, San Francisco.

    Google Scholar 

  27. Underwood, D. L. A. and Shapiro, A. M. 1999. Evidence for division of labor in the social caterpillar Eucheira socialis (Pieridae: Lepidoptera). Behav. Ecol. Sociobiol. 46:221–227.

    Google Scholar 

  28. Vega, J. M., Moneo, I., Armentia, A., Fernández, J., Vega, J., De La Fuente, R., Sanchez, P., and Sánchís, E. 1999. Allergy to the pine processionary caterpillar (Thaumetopoea pityocampa). Clin. Exp. Allergy 29:1418–1423.

    Google Scholar 

  29. Weinstein, P. and Maelzer, D. A. 1997. Leadership behavior in sawfly larvae Perga dorsalis (Hymenoptera: Pergidae). Oikos 79:450–455.

    Google Scholar 

  30. Wellington, W. G. 1957. Individual differences as a factor in populations dynamics: the development of a problem. Can. J. Zool. 35:293–323.

    Google Scholar 

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Fitzgerald, T.D. Role of Trail Pheromone in Foraging and Processionary Behavior of Pine Processionary Caterpillars Thaumetopoea pityocampa . J Chem Ecol 29, 513–532 (2003). https://doi.org/10.1023/A:1022875102682

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  • Thaumetopoea pityocampa
  • pine processionary caterpillar
  • thigmotaxis, social caterpillar
  • trail pheromone
  • caterpillar
  • foraging
  • Thaumetopoeidae