Biology of telenomus pachycoris (Hymenoptera: Scelionidae), a parasitoid of eggs of pachycoris torridus (Hemiptera: Scutelleridae): The effects of egg age, exposure time, and temperature

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dc.contributor.authorFilho, Raul Da Cunha Borges
dc.contributor.authorNava, Dori E.
dc.contributor.authorPratissoli, Dirceu
dc.contributor.authorPolanczyk, Ricardo A. [UNESP]
dc.contributor.authorMarangon, Ricardo B.
dc.contributor.authorLoiácono, Marta
dc.contributor.institutionUniversidade Federal de Pelotas
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionUniversidade Federal do Espírito Santo (UFES)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionMuseo de La Plata
dc.date.accessioned2022-04-28T19:06:23Z
dc.date.available2022-04-28T19:06:23Z
dc.date.issued2017-06-01
dc.description.abstractTelenomus pachycoris (Johnson) (Hymenoptera: Scelionidae) is a parasitoid of eggs of Pachycoris torridus (Scopoli) (Hemiptera: Scutelleridae), a main pest of physic nut (Jatropha curcas L.; Euphorbiaceae). The objective of this work was to know the biology of T. pachycoris in P. torridus eggs under various conditions in order to develop a rearing technique for this parasitoid in the laboratory. We offered eggs of P. torridus to T. pachycoris during 4 exposition periods (6, 12, 18, and 24 h), as well as eggs of different ages (1 to 11 d), to evaluate, in both experiments, the number of parasitized eggs, duration of the egg-to-adult period, percentage of emergence, and sex ratio. We also evaluated the effect of constant temperatures (18, 20, 22, 25, 28, and 30 °C) and determined the duration of the egg-to-adult period, percentage of emergence, and sex ratio and estimated the thermal requirements and the number of generations per yr of T. pachycoris at each temperature. Parasitism of eggs was the highest at 12 h of exposure. Eggs up to 3 d old were the most parasitized, and the parasitism was zero on day 11. The duration of the egg-to-adult period was inversely proportional to temperature, ranging from 33.6 d at 18 °C to 9.8 d at 30 °C. The threshold temperature estimated for T. pachycoris was 12.9 °C, and the estimated thermal constant was 163.9 degree-days. The number of generations of T. pachycoris ranged from 11.3 to 38.1 per yr at 18 and 30 °C, respectively. The results may contribute to developing techniques for rearing T. pachycoris in the laboratory.en
dc.description.affiliationFaculdade de Agronomia Eliseu Maciel Universidade Federal de Pelotas, Cx. Postal 354
dc.description.affiliationEmbrapa Clima Temperado, Rodovia Br 396, km 78 Cx. Postal 403
dc.description.affiliationCentro de Ciências Agrárias Universidade Federal do Espírito Santo, Cx. Postal 16
dc.description.affiliationFaculdade de Ciências Agrárias e Veterinárias Universidade Estadual Paulista Júlio de Mesquita, Via de Acesso Paulo Donato Castellane s/n
dc.description.affiliationDivisión Entomologia Museo de La Plata, Paseo del Bosque s/n
dc.description.affiliationUnespFaculdade de Ciências Agrárias e Veterinárias Universidade Estadual Paulista Júlio de Mesquita, Via de Acesso Paulo Donato Castellane s/n
dc.format.extent375-379
dc.identifierhttp://dx.doi.org/10.1653/024.100.0238
dc.identifier.citationFlorida Entomologist, v. 100, n. 2, p. 375-379, 2017.
dc.identifier.doi10.1653/024.100.0238
dc.identifier.issn0015-4040
dc.identifier.scopus2-s2.0-85021775738
dc.identifier.urihttp://hdl.handle.net/11449/220872
dc.language.isoeng
dc.relation.ispartofFlorida Entomologist
dc.sourceScopus
dc.subjectbiological control
dc.subjectparasitism
dc.subjectphysic nut
dc.subjectrearing technique
dc.subjecttemperature requirement
dc.titleBiology of telenomus pachycoris (Hymenoptera: Scelionidae), a parasitoid of eggs of pachycoris torridus (Hemiptera: Scutelleridae): The effects of egg age, exposure time, and temperatureen
dc.typeArtigo

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