Host-stage selection by Trybliographa rapae, a parasitoid of the cabbage root fly Delia radicum

Citation
N. Neveu et al., Host-stage selection by Trybliographa rapae, a parasitoid of the cabbage root fly Delia radicum, ENT EXP APP, 96(3), 2000, pp. 231-237
Citations number
44
Categorie Soggetti
Entomology/Pest Control
Journal title
ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA
ISSN journal
00138703 → ACNP
Volume
96
Issue
3
Year of publication
2000
Pages
231 - 237
Database
ISI
SICI code
0013-8703(200009)96:3<231:HSBTRA>2.0.ZU;2-L
Abstract
Host-stage selection by Trybliographa rapae Westwood (Hymenoptera: Figitida e) was studied in choice and no-choice experiments in the laboratory. The p arasitoid was able to reproduce in first, second, and third instars of the cabbage root fly, Delia radicum L. (Diptera: Anthomyiidae), but oviposition occurred more frequently in third instars when all three developmental sta ges were offered simultaneously. Oviposition in third instars increased the rate of development of offspring and their body size, but did not alter se x ratio. Results are discussed in the light of predictions made by the theo ry of optimal host acceptance.