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Title: SEX-RATIO CONTROL IN A PARASITIC WASP, NASONIA VITRIPENNIS . II. EXPERIMENTAL ANALYSIS OF AN OPTIMAL SEX-RATIO MODEL

Authors:
 [1]
  1. Population Genetics, Museum of Comparative Zoology Harvard University, Cambridge MA 02138
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1401548
Grant/Contract Number:
A502-65Evo2472
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Evolution
Additional Journal Information:
Journal Volume: 40; Journal Issue: 2; Related Information: CHORUS Timestamp: 2017-10-20 17:09:36; Journal ID: ISSN 0014-3820
Publisher:
Wiley-Blackwell
Country of Publication:
United States
Language:
English

Citation Formats

Orzack, Steven Hecht. SEX-RATIO CONTROL IN A PARASITIC WASP, NASONIA VITRIPENNIS . II. EXPERIMENTAL ANALYSIS OF AN OPTIMAL SEX-RATIO MODEL. United States: N. p., 2017. Web. doi:10.1111/j.1558-5646.1986.tb00476.x.
Orzack, Steven Hecht. SEX-RATIO CONTROL IN A PARASITIC WASP, NASONIA VITRIPENNIS . II. EXPERIMENTAL ANALYSIS OF AN OPTIMAL SEX-RATIO MODEL. United States. doi:10.1111/j.1558-5646.1986.tb00476.x.
Orzack, Steven Hecht. Tue . "SEX-RATIO CONTROL IN A PARASITIC WASP, NASONIA VITRIPENNIS . II. EXPERIMENTAL ANALYSIS OF AN OPTIMAL SEX-RATIO MODEL". United States. doi:10.1111/j.1558-5646.1986.tb00476.x.
@article{osti_1401548,
title = {SEX-RATIO CONTROL IN A PARASITIC WASP, NASONIA VITRIPENNIS . II. EXPERIMENTAL ANALYSIS OF AN OPTIMAL SEX-RATIO MODEL},
author = {Orzack, Steven Hecht},
abstractNote = {},
doi = {10.1111/j.1558-5646.1986.tb00476.x},
journal = {Evolution},
number = 2,
volume = 40,
place = {United States},
year = {Tue May 30 00:00:00 EDT 2017},
month = {Tue May 30 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on May 30, 2018
Publisher's Accepted Manuscript

Citation Metrics:
Cited by: 37works
Citation information provided by
Web of Science

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  • An effort was made to increase the genetic variability of laboratory populations of the diaspine scale parasite Aphytis lingnanensis, in order to increase the probability of successful artificial selection of a parasite strain with improved tolerance to temperature extremes. Thus studies were made on the effects of x irradiation on the longevity of mated adult females, and on the numbers and sexes of their progeny as well as an evaluation of the susceptibility of the species to irradiation. The numbers of progany surviving to become F/sub 1/ adults (termed net fecundity) served as a criterion of the production of lethalmore » mutations, chromosomal aberrations, and somatic effects. Irradiation of adults at doses of 250, 500, 1000, 2000, and 4000 r produced: no effect on longevity of treated adults, pronounced reduction in net fecundity with increasing x-ray dosage, indications that mature eggs were less affected by x-ray treatment than the less mature ones, and sharply reduced percentage of females in the progeny of those groups which received the highest dosages. Thus the percentage of females among the progeny of irradiated female parasites was drastically lowered by 2000 and 4000 r, but no clear indication of an effect on sex ratio was evident at the 250, 500, or 1000 r. Possible explanations of the lowered female productivity phenomena are offered. (H.H.D.)« less
  • Non-indigenous invasive mole crickets, Scapteriscus vicinus Scudder (Orthoptera: Gryllotalpidae) in Florida and S. didactylus (Latreille) (the 'changa') in Puerto Rico, are being managed with an entomopathogenic nematode, Steinernema scapterisci (Nguyen and Smart) (Rhabditida: Steinernematidae), and a parasitic wasp, Larra bicolor L. (Hymenoptera: Sphecidae). Pest mole cricket populations have declined by 95% in north central Florida since these specialist natural enemies were released and established in the 1980s. Commercial production of the nematode was initiated, nearly 70 billion were applied in 34 Florida counties, and their establishment, spread, and impact on mole crickets were monitored. The infected mole crickets dispersed themore » nematode rapidly, so that within 6 months these parasites were present in most of the insects trapped in experimental pastures. Three years later, mole cricket populations were reduced to acceptable levels and the bahiagrass had recovered. The nematode was released for the first time in Puerto Rico during 2001 and has persisted; the wasp was introduced in the late 1930s. The geographical distribution of the wasp is being expanded in Florida and Puerto Rico by planting plots of Spermacoce verticillata (L.), a wildflower indigenous to Puerto Rico and widely distributed in southern Florida. Pastures, sod farms, golf courses, landscapes, and vegetable farms in Florida and Puerto Rico are benefiting from biological control of invasive mole crickets. (author) [Spanish] Los grillotopos invasores no indigenas, Scapteriscus vicinus (Orthoptera: Gryllotalpidae) en el estado de Florida y S. didactylus ('changa') en Puerto Rico, estan siendo manejados por el nematodo entomopathogeno, Steinernema scapterisci (Rhabditida: Steinernematidae) y la avispa parasitica, Larra bicolor (Hymenoptera: Sphecidae). Las poblaciones de los grillotopo plagas han declinado un 95% en el norte central de la Florida desde que estos enemigos naturales especialistas fueron liberados y establecidos en los 80s. Consecuentemente, la produccion comercial del nematodo fue iniciada, casi 70 billones fueron aplicados en 34 condados de la Florida, y se realizo un monitoreo para evaluar su establecimiento, dispersion e impacto sobre los grillotopos. Los gillotopos infectados dispersaron los nematodos rapidamente, tanto que despues de 6 meses estos parasitos estaban presentes en la mayoria de los insectos atrapados en los pastos experimentales. Tres anos despues, las poblaciones de los grillotopos fueron reducidas a niveles aceptables y los campos de pasto 'bahia' se recuperaron. El nematodo fue liberado para la primera vez en Puerto Rico durante del 2001 y ha persistido; la avispa fue introducida al final de los 30s. La distribucion geografica de la avispa se esta extendiendo en la Florida y Puerto Rico por medio de la siembra de parcelas de Spermacoce verticillata, una flor silvestre indigena a Puerto Rico y distribuida ampliamente en el sur de la Florida. Los campos de pasto, las operaciones comerciales de cesped, los campos de golf, los paisajes y las fincas de hortalizas en la Florida y Puerto Rico se estan beneficiando del control biologico de los grillotopos invasores. (author)« less