Egg parasitoid wasps as natural enemies of the neotropical stink bug Dichelops melacanthus

• Autor(a) principal: Laumann, Raúl Alberto
• Data de Publicação: 2010
• Outros Autores: Moraes, Maria Carolina Blassioli, Silva, Joseane Padilha da, Vieira, Afrânio Márcio Corrêa, Silveira, Samantha da, Borges, Miguel
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UnB
• Texto Completo: http://repositorio.unb.br/handle/10482/27645; https://dx.doi.org/10.1590/S0100-204X2010000500002
• topic: Telenomus; Trissolcus; Controle biológico; Pragas do milho; Preferência de hospedeiro; Disponibilidade do hospedeiro

The objective of this work was to determine the potential of five species of Scelionidae wasps - Telenomus podisi, Trissolcus basalis, Trissolcus urichi, Trissolcus teretis and Trissolcus brochymenae - as natural enemies of the neotropical stink bug Dichelops melacanthus, and to determine if the presence of eggs of other stink bug species influences the parasitism and development of the parasitoids. Two kinds of experiments were done in laboratory: without choice of hosts (eggs of D. melacanthus) and with choice (eggs of D. melacanthus and of Euschistus heros). Biological parameters, including proportion of parasitism, immature survivorship, progeny sex ratio, immature stage development period, and host preference were recorded. All the evaluated parasitoids can parasitize and develop on D. melacanthus eggs. The first choice of eggs did not influence the proportion of D. melacanthus eggs parasitized by Tr. basalis, Tr. teretis or Tr. brochymenae. However, D. melacanthus eggs as the first choice of Te. podisi and Tr. urichi increased, respectively, 9 and 14 times the chance for parasitism on eggs of this species. Behavioral and ecological aspects of parasitoids should be considered prior to their use in biological control programs.