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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Desempenho biológico de indivíduos solitários e gregários de Trichogramma pretiosum Riley, 1879 (Hym.:Trichogrammatidae) em diferentes densidades do hospedeiro Corcyra cephalonica (Stainton, 1866) (Lep.: Pyralidae) /

Cardoso, Warner Gasparini. January 2016 (has links)
Orientador: Sergio Antonio De Bortoli / Banca: Ricardo Antonio Polanczyk / Banca: Ana Carolian Pires Veiga / Resumo: Este estudo objetivou determinar a influência de diferentes razões de número de ovos de Corcyra cephalonica, no desenvolvimento gregário e solitário de Trichogramma pretiosum, bem como avaliar os desempenhos biológicos e morfométricos de insetos que se desenvolveram de forma solitária e gregária. Foram oferecidas a uma fêmea de T. pretiosum, quatro diferentes densidades de ovos do hospedeiro alternativo C. cephalonica separadamente (5, 10, 20 e 30) por três dias consecutivos (dias 1, 2 e 3). Colocou-se uma fêmea, em tubo cilíndrico de fundo chato (8 cm × 2 cm), em contato com uma cartela contendo ovos do hospedeiro e uma gotícula de mel como alimento. A cartela foi trocada diariamente até a fêmea completar o terceiro dia de vida. Foram avaliadas as porcentagens de parasitismo, emergência de ovos parasitados, e o número de adultos emergidos por ovo, para cada uma das densidades. Em outra etapa, foram realizados testes com os descendentes de T. pretiosum provenientes da emergência de adultos solitários e gregários. Foi oferecido um único ovo hospedeiro exposto à oviposição por 1 dia, para uma única fêmea parasitoide, e individualizado em tubo de plástico (7,5 cm × 1 cm) contendo uma gotícula de mel. Foram avaliadas as porcentagens de parasitismo, de emergência e a longevidade de adultos, além de parâmetros morfométricos dos descendentes gregários e solitários. A relação mais baixa de hospedeiros apresentou 90% de ovos parasitados com a fêmea na idade de um dia, sendo que 68,7% ... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: This study aimed to determine the influence of different reasons of Corcyra cephalonica eggs, in gregarious and solitary development of Trichogramma pretiosum and evaluate the biological and morphometric performances of these. We were offered to one female parasitoids, four different densities of eggs of the factitious host C. cephalonica (5, 10, 20 and 30) for three days consecutive (days 1, 2 and 3). The female was placed in cylindrical tube (8 cm × 2 cm) in contact with a paperboard containing eggs of the host and a droplet of honey as food. This paperback was changed daily until the female complete the third day of life. The parasitism were evaluated, emergency of parasitized eggs and the number of emerged adults per egg for each offered densities. In another step, tests were performed with the descendants of parasitoids from the emergency solitary and gregarious adults. A single host egg oviposition exposed for one day in individual plastic tubing (7.5 cm × 1 cm) having a honey drop offered. The parasitism were evaluated, emergency and longevity of adults, and morphometric parameters of gregarious and solitaries progenies. The lower ratio hosts showed 90% of parasitized eggs with the female at the age of one day, and 68.7% of these have emerged. The development up two individuals per egg host was observed in all densities during the three-day supply of eggs, and the emergence of one individual was predominant. Adults emerging from solitary parasitize 20.5% more than gregarious and longevity of both did not differ significantly. The body size and the last posterior left tibia was significantly different, being 0.09 mm and 0.03 mm, respectively, higher in solitary adults. Host of different densities, it was possible to significantly lower the ratio, the more adults emerging from an egg C. cephalonica, with the same biological and morphometric ... (Complete abstract click electronic access below) / Mestre

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