Abstract
Pseudendaphis sp. (Barnes) [Diptera: Cecidomyiidae] is a larval endoparasitoid of the aphidSchoutedenia lutea (van der Goot) [Aphididae: Greenideinae]. A brief investigation of the biology ofPseudendaphis sp. revealed that parasitization by this species occurs only in viviparous instar III to adult life stages of the host aphid. Comparative histology of parasitized, unparasitized and starved aphids was used to evaluate proposed mechanisms of pathogenesis. Parasitization byPseudendaphis sp. was found to cause the destruction of host embryos and pathological changes in the host fat body, yet resulted in an increase in the number of host mycetocytes. There was no evidence of injury to host tissues through direct physical attack, a cytolytic enzyme or starvation-like factors. Remaining hypotheses for altered host histologies in parasitized aphids are selective nutrient depletion and production of a non-cytolytic bioactive substance by thePseudendaphis larvae.
Résumé
Pseudendaphis sp. (Barnes) [Diptera: Cecidomyiidae] est un endoparasitoïde larvaire du puceronSchoutedenia lutea (van der Goot) [Aphididae: Greenideinae]. Une étude sommaire de la biologie dePseudendaphis sp. révèle que cette espèce parasite uniquement les pucerons aptères du stade larvaire III au stade adulte. Une étude histologique comparative de pucerons parasités, non parasités et soumis à un jeûne est utilisée pour démontrer les hypothétiques mécanismes de la pathogénèse. Le parasitisme parPseudendaphis sp. cause la destruction des embryons de l'hôte ainsi que des changements pathologiques de la composition graisseuse du corps du puceron, qui résulte d'un accroissement du nombre de mycétocytes de l'hôte. Il n'y a pas d'évidence de dommages causés au tissu de l'hôte par une attaque physique directe, ni par une cytolyse enzymatique, ni par des facteurs reliés au jeûne. Les autres hypothèses pour expliquer les altérations histologiques observées chez les pucerons parasités sont un équisement de certaines substances nutritives et une production d'une substance biologique active par la larve dePseudendaphis.
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References
Barnes, H. F. — 1954. Gall-midge larvae as endoparasites, including the description of a species parasitizing aphids in Trinidad, B.W.I. —Bull. Entomol. Res., 45, 769–775.
Beckage, N. E. &Templeton, T. J. — 1986. Physiological effects of parasitism byApanteles congregatus in terminal-stage tobacco hornworm larvae. —J. Insect Physiol., 32, 299–314.
Beckage, N. E., Templeton, T. J., Nielsen B. D., Cook, D. I. &Stoltz, D. B. —1987. Parasitism-induced hemolymph polypeptides inManduca sexta (L.) larvae parasitized by the braconid waspCotesia congregata (Say.). —Insect Biochem., 17, 439–455.
Bruslé, S. — 1962. Chronologie du développement embryonnaire des femelles parthénogénétiques deBrevicoryne brassicae [Aphididae, Homoptères]. —Bull. Soc. zool. Fr., 87, 396–410.
Cloutier, C. — 1986. Amino acid utilization in the aphidAcyrthosiphon pisum infected by the parasitoidAphidius smithi. —J. Insect Physiol., 32, 263–267.
Douglas, A. E. &Dixon, A. F. G. — 1987. The mycetocyte symbiosis of aphids: variation with age and morph in virginoparae ofMegoura viciae andAcyrthosiphon pisum. —J. Insect Physiol., 33, 109–113.
Firempong, S. &Kumar, R. — 1975. Natural enemies ofToxoptera aurantii (Boy.) [Homoptera: Aphididae] on cocoa in Ghana. —Biol. J. Linn. Soc., 7, 261–292.
Griffiths, D. C. — 1961. The development ofMonoctonus paludum Marshall [Hym: Braconidae] inNasonovia ribis-nigri on lettuce, and immunity reactions in other lettuce aphids. —Bull. Entomol. Res., 52, 147–163.
Hales, D. F. &Carver, M. — 1976. A study ofSchoutedenia lutea (van der Goot, 1917) [Homoptera: Aphididae]. —Aust. Zool., 19, 85–94.
Hayakawa, Y. — 1986. Inhibition of lipid transport in insects by a factor secreted by the parasite,Blepharipa sericariae. —FEBS Lett., 195, 122–124.
Kirkpatrick, T. W. — 1954. Notes onPseudendaphis maculans Barnes, a cecidomyiid endoparasite of aphids in Trinidad, B.W.I. —Bull. Entomol. Res., 45, 777–781.
Mackauer, M. &Foottit, R. — 1979. A gall midge,Endaphis sp. [Diptera: Cecidomyiidae], as a gregarious aphid parasite. —Can. Entomol., 111, 615–620.
SAS Institue. — 1985. SAS user's guide: statistics. —SAS Institute, Cary, N.C.
Schlinger, E. I. &Hall, J. C. — 1960. The biology, behaviour and morphology ofPraon palitans Muesebeck, an internal parasite of the spotted alfalfa aphid,Therioaphis maculata (Buckton) [Hymenoptera: Braconidae, Aphidiinae]. —Ann. Entomol. Soc. Am., 53, 144–160.
Slansky, F. Jr. — 1986. Nutritional ecology of endoparasitic insects and their hosts: an overview. —J. Insect Physiol., 32, 255–261.
Soldán, T. &Starý, P. — 1981. Parasitogenic effects ofAphidius smithi [Hymenoptera, Aphidiidae] on the reproductive organs of the pea aphid,Acyrthosiphon pisum [Homoptera, Aphididae]. —Acta entomol. bohemoslov., 78, 243–253.
Spencer, H. — 1926. Biology of the parasites and hyperparasites of aphids. —Ann. Entomol. Soc. Am., 19, 119–157.
Stoltz, D. B. — 1986. Interactions between parasitoid-derived products and host insects: an overview. —J. Insect Physiol., 32, 347–350.
Vinson, S. B. &Iwantsch, G. F. — 1980. Host regulation by insect parasitoids. —Q. Rev. Biol., 55, 143–165.
Ward, S. A. &Dixon, A. F. G. — 1982. Selective resorption of aphid embryos and habitat changes relative to life span. —J. Anim. Ecol., 51, 859–864.
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Lardner, R.M., Hales, D. Histopathology of an aphid,Schoutedenia lutea, parasitized by a gall midge,Pseudendaphis sp. Entomophaga 35, 557–567 (1990). https://doi.org/10.1007/BF02375090
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DOI: https://doi.org/10.1007/BF02375090