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| Content Provider | Springer Nature Link |
|---|---|
| Author | Dahlan, A. N. Gordh, G. |
| Copyright Year | 1997 |
| Abstract | We compared the development ofTrichogramma australicum Girault in artificial-diet filled artificial “eggs” containing 10–15 (low density) or 35–50 (high density) immature parasitoids. The size of low- and high-densityT. australicum eggs at 1, 15, 30 and 36 h was not significantly different. Also, incubation time of low- and high-density eggs in artificial diet was similar. Appearance of urate bodies in larvae developing low and high density occurred at the same time (100–108 h). Size of immatureT. australicum in low density significantly increased after the urate bodies had appeared. Black deposits appeared on the surface ofT. australicum prepupae soon after all diet had been consumed (at 108–120 and 144–168 h in low and high density, respectively). We concluded that the appearance of the black deposits was an indication of the onset of the prepupal stage. The pupal size was significantly larger at low density than high density. Mortality of prepupae and pupae was significantly higher at low density than at high density. Proportion of larvae at high density developed to abnormal and normal wasps. Wasps did not emerge from larvae reared at low density.Nous avons comparé le développement sur milieu artificiel deTrichogramma australicum Girault dans des “œufs” artificiels contenant soit 10–15 (conditions de faible densité) soit 35–50 (conditions de forte densité) parasitoïdes immatures. La taille des oeufs deT. australicum après 1, 15, 30 et 36 heures de développement en conditions de faible ou de forte densité n’a pas été significativement différente. De même, le temps d’incubation des œufs a été similaire dans les deux conditions de densité. Dans les deux cas, l’apparition des corps d’urates chez les larves s’est produite au même moment (apres 100–108 heures de développement). En condition de faible densité, la taille des stades immatures deT. australicum a significativement augmenté bien que les corps d’urates soient apparus. Des dépôts noirs ont été observés à la surface des prénymphes deT. australicum une fois le milieu entièrement consommé (après 108–120 heures et 144–168 heures de développement en conditions, respectivement, de faible et de forte densité). L’apparition de ces dépôts noirs semble donc indiquer l’imminence du stade prénymphal. En conditions de faible densité, les nymphes étaient de taille significativement plus grande et la mortalité aux stades prénymphal et nymphal a été significativement plus élevée qu’en conditions de forte densité. Dans le cas de forte densité de population, une partie des larves s’est développée en adultes anormaux et normaux, alors qu’aucun adulte n’a été obtenu à partir de larves élevée en conditions de faible densité. |
| Starting Page | 525 |
| Ending Page | 536 |
| Page Count | 12 |
| File Format | |
| ISSN | 00138959 |
| Journal | BioControl |
| Volume Number | 42 |
| Issue Number | 4 |
| e-ISSN | 15738248 |
| Language | French |
| Publisher | Springer Netherlands |
| Publisher Date | 1997-01-01 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Trichogramma immature development low-density immature high-density immature artificial diet Entomology Plant Pathology Agriculture Animal Ecology Animal Biochemistry Behavioural Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science Ecology, Evolution, Behavior and Systematics Agricultural and Biological Sciences |
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