Artículos de revistas
Fertility life table of Trichogramma pretiosum and Trichogramma acacioi (Hymenoptera : Trichogrammatidae) on Sitotroga cerealella (Lepidoptera : Gelechiidae) eggs at different constant temperatures
Fecha
2004-07-01Registro en:
Annals of the Entomological Society of America. Lanham: Entomol Soc Amer, v. 97, n. 4, p. 729-731, 2004.
0013-8746
10.1603/0013-8746(2004)097[0729:FLTOTP]2.0.CO;2
WOS:000222642400013
1458288287757880
Autor
Universidade Federal do Espírito Santo (UFES)
Universidade Estadual Paulista (Unesp)
Universidade Federal de Viçosa (UFV)
Institución
Resumen
Fertility life tables were developed for both Trichogramma pretiosum and Trichogramma acacioi reared on Sitotroga cerealella eggs as an alternative host at five different temperatures. The egg parasitoids were first collected from Nipteria panacea eggs, a lepidopterous pest of avocado. Egg parasitoid females were individualized in small glass vials along with 40 eggs of the host during 24 h for parasitization. For evaluation of the parasitism capacity, a similar procedure was adopted, but cardboards with eggs were replaced every day. The net reproductive rate (Ro), intrinsic rate of increase (rm), finite rate of increase (lambda), and mean generation time (T) were estimated. Temperature affected all parameters for both Trichogramma species. The highest fecundity for both species was observed at 25degreesC. Extreme temperatures such as 15degreesC or 35degreesC negatively affect the development rate of both species.