Interspecific host discrimination and within-host competition between Encarsia formosa and E. pergandiella (Hymenoptera: Aphelinidae), two endoparasitoids of whiteflies (Hemiptera: Aleyrodidae) (Articolo in rivista)

Type
Label
  • Interspecific host discrimination and within-host competition between Encarsia formosa and E. pergandiella (Hymenoptera: Aphelinidae), two endoparasitoids of whiteflies (Hemiptera: Aleyrodidae) (Articolo in rivista) (literal)
Anno
  • 2002-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1079/BER2002203 (literal)
Alternative label
  • Pedata P.A., Giorgini M., Guerrieri E. (2002)
    Interspecific host discrimination and within-host competition between Encarsia formosa and E. pergandiella (Hymenoptera: Aphelinidae), two endoparasitoids of whiteflies (Hemiptera: Aleyrodidae)
    in Bulletin of entomological research
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Pedata P.A., Giorgini M., Guerrieri E. (literal)
Pagina inizio
  • 521 (literal)
Pagina fine
  • 528 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 92 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
  • E' stata studiata in laboratorio la competizione che si verifica tra due specie di parassitoidi, Encarsia formosa ed Encarsia pergandiella, allorquando si trovano a condividere lo stesso ospite. I due parassitoidi sono utilizzati in programmi di controllo biologico degli aleirodidi dannosi a colture orticole e ornamentali, soprattutto in serra. I risultati ottenuti contribuiscono alla individuazione della più opportuna strategia da utilizzare per il controllo biologico degli aleirodidi (lancio di una sola delle due specie di Encarsia o di entrambe). (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto per la Protezione delle Piante (IPP), CNR, Sezione di Portici, via Università 133, 80055 Portici, Napoli, Italy (literal)
Titolo
  • Interspecific host discrimination and within-host competition between Encarsia formosa and E. pergandiella (Hymenoptera: Aphelinidae), two endoparasitoids of whiteflies (Hemiptera: Aleyrodidae) (literal)
Abstract
  • Interspecific host discrimination and within-host competition between Encarsia formosa Gahan and Encarsia pergandiella (Howard), two endoparasitoids of whiteflies, were studied under laboratory conditions. Interspecific host discrimination was studied at two time intervals (0 h and 72 h after the first species had oviposited). Parasitized and unparasitized Trialeurodes vaporariorum (Westwood) hosts were accepted for oviposition at the same rate by the two parasitoid species. Host type did not affect the handling time of the two parasitoids. The outcome of within-host competition was investigated after females of the two species parasitized the hosts at various time intervals. In four treatments, E. pergandiella oviposited 0 h , 24 h, 48 h and 72 h after E. formosa while in the other two, E. formosa oviposited 0 h and 72 h after E. pergandiella. In four of these treatments: E. formosa following E. pergandiella at 0 h and 72 h, and E. pergandiella following E. formosa at 0 h and 24 h, E. pergandiella prevailed. In the host discrimination experiment (72 h interval), 20% of E. pergandiella eggs were killed by E. formosa females. Interspecific ovicide was also observed in the within-host competition experiment, in which 6% of 72 h-old E. pergandiella eggs were killed by E. formosa females. (literal)
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