The Reproductive Strategy of a Parasitic Wasp: I. Optimal Progeny and Sex Allocation in Trichogramma evanescens

Waage, J. K.; Ming, Ng Sook

doi:10.2307/4524

Cited by 240 publications

(175 citation statements)

References 20 publications

Supporting

Mentioning

162

Contrasting

Unclassified

Order By: Relevance

“…Westwood, which showed that male progeny are usually deposited in the first few hosts parasitized in a cluster ("patch") (Waage & Ng 1984). Our results agree also with their model, which assumes that the minimum number of males are produced to mate with all sibling females within a localized area (i.e., "patch").…”

Section: Trichogramma Evanescenssupporting

confidence: 80%

Comparisons Between the Squash Bug Egg Parasitoids Ooencyrtus anasae and O. sp. (Hymenoptera: Encyrtidae): Development, Survival, and Sex Ratio in Relation to Temperature

Tracy

Nechols

1987

Environmental Entomology

View full text Add to dashboard Cite

Laboratory investigations of the gregarious squash bug egg parasitoids Ooencyrtus anasae and O. n. sp. near anasae (0. sp.) were conducted at 20.8, 23.0, and 26.6°C. In both species, total developmental periods (egg to ec\osed adult) were inversely related to temperature. Temperature had no significant influence on survivorship, progeny production, or sex ratio. At each temperature, O. anasae developed and emerged about a day earlier and produced a significantly higher percentage of female progeny (77%) than did O. sp. (60%). Both parasitoids deposited an average of three (2-7) progeny per host. However, O. anasae consistently deposited more female eggs per host than did O. sp. Proportion of females produced per host by O. anasae tended to increase directly with number of hosts parasitized, but no such relationship was observed in O. sp. Total preimaginal survivorship in both parasitoids was about 89%.In O. sp., male progeny that developed without females emerged about a day later at all temperatures and had a lower pharate adult survivorship than did males that developed in hosts with female siblings.

show abstract

Section: Trichogramma Evanescenssupporting

confidence: 80%

Comparisons Between the Squash Bug Egg Parasitoids Ooencyrtus anasae and O. sp. (Hymenoptera: Encyrtidae): Development, Survival, and Sex Ratio in Relation to Temperature

Tracy

Nechols

1987

Environmental Entomology

View full text Add to dashboard Cite

show abstract

“…Dessa forma, procurou-se verificar se a maior capacidade O comprimento da tíbia posterior é uma medida que serve como parâmetro do tamanho da fêmea de Trichogramma, e se correlaciona positivamente com a capacidade dos machos localizarem as fêmeas para acasalar e com a capacidade de localização do hospedeiro, longevidade e fecundidade das fêmeas (WAAGE & MING 1984;BAI et al 1992;GREENBERG et al 1998;OLSON & ANDOW 1998 A análise da freqüência de contactos entre ovos de S. frugiperda e A. kuehniella mostrou diferenças na preferência hospedeira entre T. atopovirilia e T. pretiosum, porém sem interação significativa dos fatores espécie e hospedeiro quanto ao número de ovos parasitados (Fig. 3).…”

Section: Constataram Queunclassified

Biologia e parasitismo de Trichogramma atopovirilia Oatman & Platner e Trichogramma pretiosum Riley (Hymenoptera, Trichogrammatidae) em ovos de Spodoptera frugiperda (J.E. Smith) (Lepidoptera, Noctuidae)

Beserra

Parra

2004

Rev. Bras. entomol.

View full text Add to dashboard Cite

ABSTRACT. Biology and parasitism of Trichogramma atopovirilia Oatman & Platner and Trichogramma pretiosum Riley (Hymenoptera, Trichogrammatidae) on eggs of Spodoptera frugiperda (J.E. Smith) (Lepidoptera, Noctuidae). The parasitism capacity and development of Trichogramma atopovirilia Oatman & Platner and Trichogramma pretiosum Riley were studied in order to select the most suitable species to control Spodoptera frugiperda (J. E. Smith). The experiments were conducted under laboratory conditions at 25±2ºC, 70±10% RH and 14L:10D photoperiod. Both T. atopovirilia and T. pretiosum showed good development and adaptation to S. frugiperda eggs even after being reared for several generations in eggs of Anagasta kuehniella Zeller. However, T. atopovirilia females were more aggressive and showed higher specificity to the pest, with a higher parasitism capacity in eggs laid with different physical barriers and were more accepted by the natural host in comparison with A. kuehniella. Because of the higher parasitism rate and specificity of T. atopovirilia to the pest's egg this species should be given preference to control S. frugiperda.

show abstract

“…The second female exploiting the same patch would beneWt by ovipositing a greater proportion of male oVspring to fertilize daughters deposited by the Wrst female thus increasing the Wtness of her lineage by reducing the rates at which sib-matings occur and increasing outcrossing (Luck et al, 2001). Additionally, LMC requires sib-mating on or near the host from which they emerge (e.g., Waage and Ng, 1984;Suzuki and Hiehata, 1985;Kazmer, 1992). Male G. ashmeadi, G. triguttatus, and G. fasciatus all emerge one day prior to females and remain close to the parasitized egg mass from which they emerged, and they immediately begin mating with newly emerged females Irvin personal observation).…”

Section: Sex Ratio Allocation In Gonatocerus Sppmentioning

confidence: 99%

The effect of intraspecific competition on progeny sex ratio in Gonatocerus spp. for Homalodisca coagulata egg masses: Economic implications for mass rearing and biological control

Irvin

Hoddle

2006

Biological Control

View full text Add to dashboard Cite

The eVect of the number of simultaneously ovipositing females on progeny sex ratio of three Homalodisca coagulata egg parasitoids, Gonatocerus ashmeadi, G. triguttatus, and G. fasciatus was investigated in the laboratory. When one female Gonatocerus parasitoid was present, progeny production was strongly female biased producing »1 male:8 females, 1:14 and 1:9 for G. ashmeadi, G. triguttatus and G. fasciatus, respectively. Increasing the number of simultaneous ovipositing females from 1 to 3, signiWcantly increased percentage of male oVspring by up to 61% for all three Gonatocerus species. Overall percentage male oVspring ranged from 31-34%, and did not signiWcantly diVer among species. Overall mean percentage parasitism by G. ashmeadi was up to 16% higher compared with G. triguttatus and G. fasciatus, whereas, average clutch size and mean progeny production was more than twofold higher for G. fasciatus when compared with G. ashmeadi and G. triguttatus. Additional laboratory trials with only G. ashmeadi demonstrated that when H. coagulata egg masses consisted of 2-13 eggs, 67-100% of females allocated one male oVspring per egg mass. When one egg mass was presented to Wve female G. ashmeadi searching concurrently, male oVspring was up to 22% higher compared with male oVspring from host eggs exposed to one female G. ashmeadi. Experiments indicated that allocation of male eggs was not inXuenced by constant female-to-female contact for 19 h prior to host exposure, and female G. ashmeadi did not alter allocation of male eggs when sibling and non-sibling conspeciWcs were contesting host egg masses. The economic signiWcance for mass rearing is substantial. For G. ashmeadi at 2003 production costs and under optimal conditions, estimated cost per female was $1.42, under suboptimal conditions, cost per female increased to $4.51; a 218% increase in production cost per female parasitoid.

show abstract

The Reproductive Strategy of a Parasitic Wasp: I. Optimal Progeny and Sex Allocation in Trichogramma evanescens

Cited by 240 publications

References 20 publications

Comparisons Between the Squash Bug Egg Parasitoids Ooencyrtus anasae and O. sp. (Hymenoptera: Encyrtidae): Development, Survival, and Sex Ratio in Relation to Temperature

Comparisons Between the Squash Bug Egg Parasitoids Ooencyrtus anasae and O. sp. (Hymenoptera: Encyrtidae): Development, Survival, and Sex Ratio in Relation to Temperature

Biologia e parasitismo de Trichogramma atopovirilia Oatman & Platner e Trichogramma pretiosum Riley (Hymenoptera, Trichogrammatidae) em ovos de Spodoptera frugiperda (J.E. Smith) (Lepidoptera, Noctuidae)

The effect of intraspecific competition on progeny sex ratio in Gonatocerus spp. for Homalodisca coagulata egg masses: Economic implications for mass rearing and biological control

Contact Info

Product

Resources

About