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

  title={Behavioral responses to host foodplants of two populations of the insect parasitoid Cotesia congregata (Say)},
  author={Karen M. Kester and Pedro Barbosa},
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… 

The role of host plant species in the phenotypic differentiation of sympatric populations of Aleiodes nolophanae and Cotesia marginiventris

P phenotypic differences among populations associated with different host plant species vary geographically (i.e., parasitoid phenotype associated withDifferentHost plant species differ at some sites while it is the same at other sites).

Incidence of Parasitoids and Parasitism of Bemisia tabaci (Homoptera: Aleyrodidae) in Numerous Crops

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Genetic Differentiation of Two Host—Foodplant Complex Sources of Cotesia congregata (Hymenoptera: Braconidae)

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The Role of Host-Plant Species in the Differentiation of Sympatric Populations of Hymenopteran Parasitoids

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Tritrophic interactions reinforce a negative preference–performance relationship in the tobacco hornworm (Manduca sexta)

The data obtained in the present study show that the negative preference‐performance relationship in hornworms across solanaceous plants is maintained in part because by utilising noxious food plants M. sexta gains protection against parasitism.

The roles of nicotine and natural enemies in determining larval feeding site distributions of Manduca sexta L. and Manduca quinquemaculata (Haworth) on tobacco

Results suggest that although nicotine concentration and species specific responses to nicotine play a role in determining feeding site locations, pressure exerted by natural enemies, especially parasitism by C. congregata, is more important.

Variability and genetic components of innate fruit odour recognition in a parasitoid of Drosophila

A strong genetic component is identified in the responses to odours from the host habitat, involved in host selection by insect parasitoids, and the genetic basis of the two characters studied is provided.



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The suggestion that plant allelochemicals, which may function to provide plant resistance against pest herbivores, can be detrimental to natural enemies of the pest is supported.

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Landing and searching responses were differentially affected by postemergence experience, and the type of stimuli involved in searching or landing and may have adaptive significance.

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Results suggest that interactions between plant allelochemicals and parasitoids should be considered in the development of theory on insect herbivory and plant defense.

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Much evidence is incompatible with the widely held assumptions that diet breadth is a species characteristic and that specialization among herbivorous insects implies greater efficiency and less niche overlap.