Abstract
During their larval phase, Plagiometriona flavescens(Boheman, 1855) and Stolas chalybea (Germar, 1824) (Chrysomelidae: Cassidinae), carry masses of feces and exuviae on their back called fecal shield, and it is suggested to protect larvae against natural enemies. We investigated if the physical barrier provided by the shield plays any role in the defense of these larvae. We conducted a field experiment checking the mortality of larvae of both species with their natural shields substituted by an artificial shield, with shields removed and with their shields intact. Mortality controls for each of the 3 shield treatments were carried out on host plants protected against natural enemies. On both species we observed that larvae with their shields intact had a significant lower mortality proportion than larvae with artificial shields or without shields. Control larvae on protected plants had low mortality. Our results agree with literature data, showing that fecal shields do not provide a physical protection to larvae but are important in their defense, probably due to the chemicals present in them.
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References
Buzzi, J. Z., 1994. Host plants of Neotropical Cassidinae. In: P. H. Jolivet, M. L. Cox & E. Petitpierre (eds), Novel Aspects of the Biology of Chrysomelidae. Kluwer Academic Publishers, Dordrecht, pp. 205–211.
Damman, H. & N. Cappuccino, 1991. Two forms of defence in a chrysomelid beetle: egg clumping and excrement cover. Ecological Entomology 16: 163–167.
Eisner, T., E. Tassel, J. E. Carrel, 1967. Defensive use of `fecal shield’ by a beetle larva. Science 158: 1471–1473.
Eisner, T., M. Eisner, 2000. Defensive use of a fecal thatch by a beetle larva (Hemisphaerota cyanea). Proceedings of the National Academy of Science USA 97: 2632–2636.
Ferraz, J. M. G., 1991. Estudos bioecológicos sobre Spodoptera frugiperda (Abbot, Smith, 1797 ) ( Lepidoptera: Noctuidae) como subsfdio ao manejo integrado de pragas na cultura do milho. Ph.D Thesis. Universidade Estadual de Campinas, SP, Brazil.
Gómez, N. E., L. Witte, T. Hartmann, 1999. Chemical defense in larval tortoise beetles: essential oil composition of fecal shields of Eurypedus nigrosignata and foliage of its host plant, Cordia curassavica. Journal of Chemical Ecology 25: 1007–1027.
Hilker, M., 1992. Protective devices of early developmental stages in Pyrrhalta viburni ( Coleoptera: Chrysomelidae). Oecologia 92: 71–75.
Morton, T. C., F. V. Vend, 1998. Larval beetles form a defense from recycled host plant chemicals discharged as fecal wastes. Journal of Chemical Ecology 24: 765–785.
Müller, C., M. Hilker, 1999. Unexpected reactions of a generalist predator towards defensive devices of cassidine larvae ( Coleoptera, Chrysomelidae). Oecologia 118: 166–172.
Nogueira-de-Sa, F., M. V. Macêdo, 1998. Host plant preference of Plagiometrionoa flavescens (Coleoptera: Chrysomelidae) for two Solanaceous species. In: M. Biondi, M. Daccordi, D. Furth (eds), Proceedings of the Fourth International Symposium on the Chrysomelidae. Museo Regionale Di Scienze Naturali, Turin, pp. 287–297.
Olmstead, K., 1994. Waste products as chrysomelid defenses In: P. H. Jolivet, M. L. Cox, E. Petitpierre (eds.), Novel Aspects of the Biology of Chrysomelidae. Kluwer Academic Publishers, Dordrecht, pp. 311–318.
Olmstead, K., R. F. Denno, 1993. Effectiveness of tortoise beetle larval shields against different predator species. Ecology 74: 1394–1405.
Ripperger, H., K. Schreiber, 1981. Solanum steroid alkaloids. The Alkaloids 19: 81–192.
Root, R. B., F. J. Messina, 1983. Defensive adaptations and natural enemies of a case bearing beetle, Exema canadensis ( Coleoptera: Chrysomelidae). Psyche 90: 67–80.
Vend, F. V., T. C. Morton, 1998. The shield defense of the sumac flea beetle, Blepharida rhois ( Chrysomelidae: Alticinae). Chemoecology 8: 25–32.
Vend, F. V., T. C. Morton, R. O. Mumma, J. C. Schultz, 1999. Shield defense of larval tortoise beetles. Journal of Chemical Ecology 25: 549–566.
Zar, J. H., 1999. Biostatistical Analysis, 4th Edition. Prentice Hall, Upper Saddle River, NJ, USA.
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Nogueira-de-Sá, F., Trigo, J.R. (2002). Do fecal shields provide physical protection to larvae of the tortoise beetles Plagiometriona flavescens and Stolas chalybea against natural enemies?. In: Nielsen, J.K., Kjær, C., Schoonhoven, L.M. (eds) Proceedings of the 11th International Symposium on Insect-Plant Relationships. Series Entomologica, vol 57. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-2776-1_23
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DOI: https://doi.org/10.1007/978-94-017-2776-1_23
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-6129-4
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