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Biologie de la Larve Planidium de Villa Brunnea, Diptère Bombyliide, Parasite de la Processionnaire du Pin. III. Le Début de la Vie Endoparasitaire du Planidium, les Réactions de l'Hôte et les Échecs du Parasitisme.

Biologie de la Larve Planidium de Villa Brunnea, Diptère Bombyliide, Parasite de la... Summary The endoparasitic life of Villa brunnea in the pupae of the pine processionary moth, Thaumetopoea pityocampa, begins by a « fixed period », 25 minutes to 20 days long, during which the planidium stays joined with the host integument, generally does not eat, and undergoes important physiological transformations. At the beginning of this fixed period, the host pupa often reacts by siphonogenesis. A « reactive sheath » is then built round the planidium. The length of this sheath varies from 0 to 3,2 mm. Some planidia die during their fixed period or shortly later, because of a defective adaptation to their host or of superparasitism. Encapsulation goes generally together with their death, but it is only a consequence of a pre-existant and irreversible weaking of the larvae. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annales de la Société entomologique de France (N S ) Taylor & Francis

Biologie de la Larve Planidium de Villa Brunnea, Diptère Bombyliide, Parasite de la Processionnaire du Pin. III. Le Début de la Vie Endoparasitaire du Planidium, les Réactions de l'Hôte et les Échecs du Parasitisme.

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Publisher
Taylor & Francis
Copyright
© 1979 Société entomologique de France
ISSN
2168-6351
eISSN
0037-9271
DOI
10.1080/21686351.1979.12278724
Publisher site
See Article on Publisher Site

Abstract

Summary The endoparasitic life of Villa brunnea in the pupae of the pine processionary moth, Thaumetopoea pityocampa, begins by a « fixed period », 25 minutes to 20 days long, during which the planidium stays joined with the host integument, generally does not eat, and undergoes important physiological transformations. At the beginning of this fixed period, the host pupa often reacts by siphonogenesis. A « reactive sheath » is then built round the planidium. The length of this sheath varies from 0 to 3,2 mm. Some planidia die during their fixed period or shortly later, because of a defective adaptation to their host or of superparasitism. Encapsulation goes generally together with their death, but it is only a consequence of a pre-existant and irreversible weaking of the larvae.

Journal

Annales de la Société entomologique de France (N S ) – Taylor & Francis

Published: Jul 31, 1979

Keywords: Diptera; Bombyliidae; Villa brunnea; Thaumetopoea pityocampa; parasitisme; adaptation à la vie endoparasitaire; réactions de défense; siphonogenèse; encapsulement; compétition intraspécifique

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