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| Auad,Alexander M.; Freitas,Sérgio de; Barbosa,Leonardo R.. |
| Searching and handling time of Chrysoperla externa (Hagen, 1861) (Neuroptera, Chrysopidae) larvae fed on Uroleucon ambrosiae (Thomas, 1878) (Hemiptera, Aphididae). The objective of this research was to determine the searching and handling times of three larval instars of C. externa fed on U. ambrosiae at densities of 30, 40 and 50 per vial, with the feeding of the larvae at the preceding instars being U. ambrosiae nymphs or Sitotroga cerealella (Olivier, 1819) eggs. The larvae were maintained at 25 ± 2 ºC, 70 ± 10% RH and a 14-h photophase. A completely randomized design in a 6 x 3 factorial scheme with 12 replicates was adopted. The shortest searching time was found for the 2nd and 3rd instar larvae of C. externa, and this parameter was variable depending... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aphid; Functional response; Green lacewing. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262002000400007 |
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| Auad,Alexander M.; Freitas,Sérgio de; Barbosa,Leonardo R.. |
| Feeding potential of Chrysoperla externa (Hagen) (Neuroptera, Chrysopidae) in different densities of Uroleucon ambrosiae (Thomas) (Hemiptera, Aphididae). The feeding potential of 2nd and 3rd instar larvae of Chrysoperla externa (Hagen, 1861) in relation to different densities of 30, 40 and 50 nymphs of Uroleucon ambrosiae (Thomas, 1878) at 3rd and 4th instars was evaluated. The treatments were individualized into 2.5 cm in diameter and 8.5 cm tall flat bottom glass vials and maintained in a controlled environmental chamber at 25±2 ºC temperature, 70±10% RH and 14 h photophase. A completely randomized experimental design with 10 replications was used. The consumption of the prey nymphs by the predator larvae was evaluated after 1, 2, 4, 8, 16 and 24 h from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aphids; Biological control; Green lacewing; Predation. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262003000100003 |
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| Auad,Alexander M.; Freitas,Sérgio de; Barbosa,Leonardo R.. |
| Com esta pesquisa objetivou-se verificar o consumo de Uroleucon ambrosiae em diferentes densidades, por larvas de Chrysoperla externa provenientes de diferentes regimes alimentares, em casa-de-vegetação. Ninfas de 3º e 4º ínstares do afídeo foram separadas nas densidades 30, 40 e 50, e colocadas nas plantas de alface (35 dias de idade), as quais, foram envolvidas por gaiola de armação de ferro de 27x27x26 cm cobertas com tecido voil e acoplada nos tubos de PVC do cultivo hidropônico. Quatro horas após, uma larva de C. externa, de diferentes ínstares e previamente alimentadas com U. ambrosiae ou ovos de Sitotroga cerealella (Olivier, 1819), foi liberada próximo à colônia de afídeos, sendo a gaiola fechada imediatamente; o mesmo procedimento foi adotado... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Controle biológico; Crisopídeo; Afídeos. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542003000300005 |
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