Effect of host quality of Callosobruchus maculatus (Coleoptera: Bruchidae) on performance of the egg parasitoid Uscana lariophaga (Hymenoptera: Trichogrammatidae).
Bull Entomol Res
; 95(4): 341-7, 2005 Aug.
Article
en En
| MEDLINE
| ID: mdl-16048682
ABSTRACT
Development and reproductive success of the solitary egg parasitoid Uscana lariophaga Steffan were examined after development in eggs of the bruchid storage pest Callosobruchus maculatus Fabricius reared at either low or high densities on cowpea seeds and laid at day 1 and 4 of maternal life. Both bruchid larval competition and maternal age negatively affected egg size, but the latter more than the former. Uscana lariophaga reared in small hosts developed slower, were smaller and produced fewer eggs compared to parasitoids reared in large hosts. Fecundity of the parasitoid was heavily influenced by host egg size. This was reflected in the values for the intrinsic rate of increase of U. lariophaga, which differed for wasps that developed in host eggs laid by bruchid females of different age. Wasps allocated marginally more female offspring to larger hosts.
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Bases de datos:
MEDLINE
Asunto principal:
Oviposición
/
Escarabajos
/
Himenópteros
Límite:
Animals
Idioma:
En
Revista:
Bull Entomol Res
Año:
2005
Tipo del documento:
Article
País de afiliación:
Países Bajos