, Volume 99, Issue 1–2, pp 151–157 | Cite as

Behavioral responses to host foodplants of two populations of the insect parasitoid Cotesia congregata (Say)

  • K. M. Kester
  • P. Barbosa
Original Paper


To test the hypothesis that natural enemy populations differ in their behavioral responses to plants or to plant allelochemicals, we compared two populations of the gregarious larval endoparasitoid, Cotesia congregata (Say) (Hymenoptera: Braconidae) that differed in their historical and present exposure to tobacco. The major hosts for both populations were Manduca sexta L. and M. quinquemaculata (Haworth) (Lepidoptera: Sphingidae), but these hosts were typically encountered on tobacco by parasitoids in one population (Upper Marlboro) and on tomato by parasitoids in another population (Wye). Early in the season, Wye parasitoids preferred to oviposit in M. sexta on tomato rather than on tobacco and Upper Marlboro parasitoids showed no preference; neither population showed any preference later in the season. Neither of the strains originating from the two populations showed a landing preference for tobacco or tomato in flight chamber trials, but Upper Marlboro parasitoids searched longer on tobacco than on tomato, and Wye parasitoids searched longer on tomato. When nicotine solutions were applied to tobacco leaf, searching responses of Upper Marlboro parasitoids were enhanced by 0.001–1.0% nicotine, and searching responses of Wye parasitoids were decreased by 0.01–1.0% nicotine. We speculate that population differences in searching responses to tobacco and nicotine may explain the differential parasitism responses found early in the season.

Key words

Local adaptation Population differences Parasitoid behavior Cotesia congregata Manduca sexta 


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  1. Barbosa P, Saunders JA, Kemper J, Trumble R, Olechno J, Martinat P (1986) Plant allelochemicals and insect parasitoids: the effects of nicotine on Cotesia congregata (Say) (Hymenoptera: Braconidae) and Hyposoter annulipes (Cresson) (Hymenoptera: Ichneumonidae). J Chem Ecol 12:1319–1328Google Scholar
  2. Barbosa P, Kemper J, Gross P, Martinat P (1990) Influence of dietary nicotine and colony source of Manduca sexta (Lepidoptera: Sphingidae) on its suitability as a host of Cotesia congregata (Hymenoptera: Braconidae). Entomophaga 35:223–231Google Scholar
  3. Barbosa P, Gross P, Kemper J (1991) Influence of plant allelochemicals on the performance of the tobacco hornworm and its parasitoid, Cotesia congregata. Ecology 72:1567–1575Google Scholar
  4. Bentz J, Barbosa P (1990) Effects of dietary nicotine (0.1%) and parasitism by Cotesia congregata on the growth and food consumption and utilization of the tobacco hornworm, Manduca sexta. Entomol Exp Appl 57:1–8Google Scholar
  5. Fox LR, Morrow PA (1981) Specialization: species property or local phenomenon? Science 211:887–893Google Scholar
  6. Gilmore JU (1938a) Observations on the hornworm attacking tobacco in Tennessee and Kentucky. J Econ Entomol 31:706–712Google Scholar
  7. Gilmore JU (1938b) Notes on Apanteles congregatus (Say) as a parasite in tobacco hornworms. J Econ Entomol 31:712–715Google Scholar
  8. Heimann RK (1960) Tobacco and Americans. McGraw-Hill, New YorkGoogle Scholar
  9. Hodges RW (1971) The moths of America north of Mexico, fascicle 21, Sphingoidea. Classey, MiddlesexGoogle Scholar
  10. Jackson DM, Severson RF (1987) Alkaloid development and tobacco budworm survival on isogeneic tobacco lines. Tobacco Chem Res Conf 41:45Google Scholar
  11. Kester KM (1991) Behavioral and ecological constraints imposed by plants on the insect parasitoid Cotesia congregata (Say). Ph.D. Thesis, University of Maryland, College ParkGoogle Scholar
  12. Kester KM, Barbosa P (1991a) Behavioral and ecological constraints imposed by plants on insect parasitoids. Biol Cont Theor Appl 1:94–106Google Scholar
  13. Kester KM, Barbosa P (1991b) Post-emergence learning in the insect parasitoid, Cotesia congregata (Say). J Insect Behav 4:727–742Google Scholar
  14. Kester KM, Barbosa P (1992) Effects of postemergence exposure on searching and landing responses to plants in the insect parasitoid Cotesia congregata (Say). J Insect Behav 5:301–320Google Scholar
  15. Krombein KV, Hurd PD, Smith DR, Burks BD (1979) Catalog of Hymenoptera in America north of Mexico. Smithsonian Institution, Washington, D.C.Google Scholar
  16. MacKay DA (1985) Prealighting search behavior and host plant selection by ovipositing Euphydryas editha butterflies. Ecology 66:142–151Google Scholar
  17. Maryland Cooperative (1985) Commercial vegetable production recommendations (Extension publication 236, revised 1985). University of Maryland, College ParkGoogle Scholar
  18. McKee C (1982) Handbook on the culture of Maryland tobacco, 6th edn. Maryland Tobacco Improvement Foundation, Upper MarlboroGoogle Scholar
  19. Mehta CR, Patel NR (1983) A network algorithm for the exact treatment of Fisher's exact test in RxC contingency tables. J Am Stat Assoc 78:427–434Google Scholar
  20. Morgan AC (1910) Observations recorded at the 236th regular meeting of the Entomological Society of Washington. Proc Entomol Soc Wash 12:72Google Scholar
  21. Papaj DR, Rauscher MD (1983) Individual variation in host location by phytophagous insects. In: Ahmad S (ed) Herbivorous insects: host-seeking behavior and mechanisms. Academic Press, New York, pp 77–124Google Scholar
  22. Parr JC, Thurston R (1972) Toxicity of nicotine in synthetic diets to larvae of the tobacco hornworm. Ann Entomol Soc Am 65:1185–1188Google Scholar
  23. Rauscher MD, MacKay DA, Singer MC (1981) Pre- and post-alighting host-discrimination by Euphydryas editha butterflies: the behavioral mechanisms causing clumped distributions of egg clusters. Anim Behav 29:1220–1228Google Scholar
  24. SAS Institute (1985) SAS user's guide: statistics, version 5 edn. SAS Institute, CaryGoogle Scholar
  25. Sisson VA, Saunders JA (1983) Catalog of the tobacco introductions in the U.S. Department of Agriculture's tobacco germplasm collection (Nicotiana tabacum). US Dep Agric Agric Res Serv ARM-S-27 New Orleans, pp 1–27Google Scholar
  26. Stanton ML (1982) Searching in a patchy environment: foodplant selection by Colias philodice butterflies. Ecology 63:839–853Google Scholar
  27. Thorpe K, Barbosa P (1986) Effects of consumption of high and low nicotine tobacco by Manduca sexta (Lepidoptera: Sphingidae) on the survival of the gregarious parasitoid Cotesia congregata (Hymenoptera: Braconidae). J Chem Ecol 12:1329–1337Google Scholar
  28. Thurston R, Fox PM (1972) Inhibition by nicotine of emergence of Apanteles congregatus from its host, the tobacco hornworm. Ann Entomol Soc Am 65:547–550Google Scholar
  29. Thurston R, Smith WT, Cooper BP (1966) Alkaloid secretion by trichomes of Nicotiana species and resistance to aphids. Entomol Exp Appl 9:428–432Google Scholar

Copyright information

© Springer Verlag 1994

Authors and Affiliations

  • K. M. Kester
    • 1
  • P. Barbosa
    • 2
  1. 1.Department of EntomologyUniversity of MarylandCollege ParkUSA
  2. 2.Department of BiologyUniversity of CaliforniaSanta CruzUSA

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