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Effects of postemergence experience on searching and landing responses of the insect parasitoid,Cotesia congregata (Say) (Hymenoptera: Braconidae), to plants (1992)

Kester, K. M. ; Barbosa, P.

Springer

Journal of insect behavior 5 (1992), S. 301-320

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ISSN: 1572-8889

Schlagwort(e): postemergence learning ; cross-induction ; foraging behavior ; Cotesia congregata (Say) ; Braconidae ; Hymenoptera

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract Postemergence experience with one of six plant species, in the presence of the host larva, modified the searching response of reproductively mature females of Cotesia congregata(Say) to these plants in at least one of three ways: (1) an increased response to the plant experienced at emergence, (2) an increased response to other plants, or (3) an inhibited response to other plants. Landing and searching responses were differentially affected by postemergence experience. For example, postemergence experience with tobacco (a common plant) in the presence of the host larva induced a landing preference for this plant over parsley (a novel plant) but did not affect searching responses to either plant, whereas experience with parsley and the host larva induced an increased searching response to parsley but a landing preference for tobacco. Differential effects of postemergence experience may reflect the type of stimuli involved in searching or landing and may have adaptive significance.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01049840

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Digitale Medien

Postemergence learning in the insect parasitoid,Cotesia congregata (Say) (Hymenoptera: Braconidae) (1991)

Kester, K. M. ; Barbosa, P.

Springer

Journal of insect behavior 4 (1991), S. 727-742

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ISSN: 1572-8889

Schlagwort(e): postemergence learning ; early-adult experience ; Cotesia congregata (Say) ; Braconidae ; Hymenoptera

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract Exposing newly emerged females of Cotesia congregata(Say) to wild cherry, an inherently unattractive plant, and their host larvae at 0–4 h after adult emergence induced a positive searching response to wild cherry and an inhibited response to cabbage, an attractive plant. Inherent responses were not affected when females were exposed to their hosts at 0–12 h and to cherry at 8–12 h after emergence. The induced response to cherry was constant until its disappearance at 6–7 days;inhibition of the response to cabbage was released at 4–5 days after emergence. Postemergence exposure to cherry and parasitoid cocoons induced similar but weaker searching responses. Induced searching responses exhibit features of associative learning and receptor modification. In addition to its presumed role in foraging, postemergence experience with plants may encourage assortative mating of C. congregatawithin suitable host habitats and, thus, facilitate local adaptations to specific plants.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01052227

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Digitale Medien

Influence of dietary nicotine on the fall armyworm, Spodoptera frugiperda and its parasitoid, the ichneumonid wasp Hyposoter annulipes (1988)

El-Heneidy, A. H. ; Barbosa, P. ; Gross, P.

Springer

Entomologia experimentalis et applicata 46 (1988), S. 227-232

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ISSN: 1570-7458

Schlagwort(e): tri-trophic level interactions ; nicotine ; alkaloid ; Hyposoter annulipes ; Hymenoptera ; Ichneumonidae ; fall armyworm ; Spodoptera frugiperda ; Lepidoptera ; Noctuidae

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Beschreibung / Inhaltsverzeichnis: Résumé Des quantités croissantes de nicotine dans l'alimentation ont prolongé la durée du développement des chenilles saines, bien que l'effet ait chuté aux concentrations les plus élevées. Le sexe de la noctuelle n'a pas eu d'effet sur la durée du développement ou l'action de la nicotine. L'influence de la nicotine sur le poids des chrysalides est inhabituel, en ce sens que les chrysalides les plus lourdes ont été obtenues aux concentrations moyennes. Des hypothèses sont proposés sur l'origine de ce phénomène. La mortalité et la durée de développement de H. annulipes ont augmenté et le poids des adultes a diminué quand la concentration de l'aliment de l'hôte en nicotine s'est élevée. L'effet différente de la nicotine sur des générations successives a pu provenir de modifications de la toxicité de la nicotine en fonction de changements dans la qualité de l'aliment. Quoi qu'il en soit, l'augmentation de la concentration de la nicotine dans l'alimentation de l'hôte a eu un effet négatif cohérent sur la valeur adaptative de H. annulipes.

Notizen: Abstract Experiments were conducted to determine the influence of nicotine (at a range of concentrations) in the food of an herbivorous host on the development, size and survival of its parasitoid. Fall armyworms, Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) were reared on diets of 0, 0.025, 0.050 and 0.075% nicotine and exposed to parasitism by Hyposoter annulipes (Hymenoptera: Ichneumonidae). As nicotine concentration increased parasitoid mortality and development time increased and adult weight decreased. Development time, pupal weight and survival were recorded for unparasitized armyworms. Unparasitized fall armyworms showed lengthened development and higher mortality but pupal weights were greatest at intermediate nicotine concentrations.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00364193

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Digitale Medien

Plant allelochemicals and insect parasitoids effects of nicotine onCotesia congregata (say) (Hymenoptera: Braconidae) andHyposoter annulipes (Cresson) (Hymenoptera: Ichneumonidae) (1986)

Barbosa, P. ; Saunders, J. A. ; Kemper, J. ; [weitere]

Springer

Journal of chemical ecology 12 (1986), S. 1319-1328

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ISSN: 1573-1561

Schlagwort(e): Plant allelochemical ; parasitoids ; three trophic level interactions ; nicotine ; Manduca sexta ; Lepidoptera ; Sphingidae ; Spodoptera frugiperda ; Noctuidae ; Cotesia congregata ; Hymenoptera ; Braconidae ; Hyposoter annulipes ; Ichneumonidae

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Chemie und Pharmazie

Notizen: Abstract Parasitoids developing within tobacco hornworms or fall army-worms exhibit significant differences in development and survival depending on whether their hosts fed on nicotine-free or nicotine-containing diets. The effects of nicotine were more severe on the relatively less adapted parasitoid,H. annulipes than the specialist parasitoid,Cotesia congregata. Labeled alkaloid originally placed in herbivore diet was incorporated in several parasitoid tissues. These results suggest that interactions between plant allelochemicals and parasitoids should be considered in the development of theory on insect herbivory and plant defense.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01012351

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Digitale Medien

Effects of comsumption of high and low nicotine tobacco byManduca sexta (Lepidoptera: Sphingidae) on survival of gregarious endoparasitoidCotesia congregata (Hymenoptera: Braconidae) (1986)

Thorpe, K. W. ; Barbosa, P.

Springer

Journal of chemical ecology 12 (1986), S. 1329-1337

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ISSN: 1573-1561

Schlagwort(e): Plant allelochemical ; parasitoid ; three trophic level interaction ; antibiosis ; nicotine ; tobacco ; Manduca sexta ; Lepidoptera ; Sphingidae ; Cotesia congregata ; Hymenoptera ; Braconidae

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Chemie und Pharmazie

Notizen: Abstract The significance of nicotine in the three trophic level interaction involving tobacco (Nicotiana tabacum), the tobacco hornworm (Manduca sexta), and the parasitoidCotesia congregata was investigated in field plots of two varieties of tobacco which had about a 10-fold difference in their nicotine content. WhileM. sexta mortality, rates of parasitism byC. congregata, and the total number ofC. congregata larvae produced per host were similar on each of the two varieties, the number of parasitoids reaching adult-hood on the low nicotine treatment was nearly twice that on the high nicotine treatment. This difference was due to the significantly greater proportion of parasitoid larvae which failed to emerge from the host or that died prior to pupation after emerging from hosts which fed on the high nicotine variety. A greater proportion of larvae from hosts which fed on the low nicotine tobacco died as pupae. No treatment differences occurred for either sex of the parasitoid in individual dry weight, longevity, or pupal development time, except that female pupal duration was prolonged in the high nicotine treatment. These results support the suggestion that plant allelochemicals, which may function to provide plant resistance against pest herbivores, can be detrimental to natural enemies of the pest.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01012352

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