Selitrichodes neseri in Brazil, and data on its biology

• Published in: The Florida entomologist Vol. 100; no. 3; p. 589
• Main Authors: Masson, Marcus V, Tavares, Wagner de S, Lopes, Fabricio de A, Souza, Amanda R. de, Ferreira-Filho, Pedro J, Barbosa, Leonardo R, Wilcken, Carlos F, Zanuncio, Jose C
• Format: Journal Article
• Language: English
• Published: Florida Entomological Society 01-09-2017
• Subjects: Biological insect control; Chalcidoidea; Control; Diseases and pests; Eucalyptus; Methods; Observations; Parasitoids; Brazil
• ISSN: 0015-4040

Blue gum chalcid, Leptocybe invasa Fisher & La Salle (Hymenoptera: Eulophidae), causes galling damage to Eucalyptus species (Myrtaceae) in various regions of the world, but has been controlled effectively by its primary parasitoid, Selitrichodes neseri Kelly & La Salle (Hymenoptera: Eulophidae). The objectives of this study were to evaluate the recovery of S. neseri after its initial release on Eucalyptus plants in Brazil and to provide data on its biology. Selitrichodes neseri was imported from South Africa to Brazil for the biological control of L. invasa, in Mar 2015, and recovered from Aug 2015 to Dec 2016. Successful recovery of this parasitoid shows its potential to become established in the field. Seedlings of 2 hybrids obtained from crosses between rose gum Eucalyptus grandis W. Hill. ex Maiden and flooded gum Eucalyptus urophylla S. T. Blake and between Eucalyptus sp. and (river red gum Eucalyptus camaldulensis Dehnh. x E. grandis) showed potential as hosts for culture of S. neseri on L. invasa in the laboratory because up until the adult parasitoid emergence these seedlings did not wilt. When reared at 25.1 to 26.0 [degrees]C, the total number of parasitoids and the proportion of male parasitoids were highest, relative to hosts reared at 26.1 to 27.0 [degrees]C. Peak emergence of S. neseri occurred 28 d after parasitism. Key Words: emergence; exotic pest; gall wasp; parasitoid; South Africa Vespa-da-galha, Leptocybe invasa Fisher & La Salle (Hymenoptera: Eulophidae), causa galhas danosas as especies de Eucalyptus (Myrtaceae) em varias regioes do mundo, mas tern sido efetivamente controlada por seu parasitoide primario, Selitrichodes neseri Kelly & La Salle (Hymenoptera: Eulophidae). Os objetivos deste estudo foram avaliar a recuperacao de S. neseri apos sua liberacao inicial em plantas de Eucalyptus no Brasil e fornecer dados sobre sua biologia. Selitrichodes neseri foi importado da Africa do Sul para o Brasil para o controle biologico de L. invasa em marco de 2015 e recuperado de agosto de 2015 a dezembro de 2016. Recuperacao com sucesso deste parasitoide mostra seu potencial para se tornar estabelecido no campo. Mudas de 2 hibridos obtidos a partir dos cruzamentos Eucalyptus grandis W. Hill. ex Maiden and Eucalyptus urophylla S. T. Blake e entre Eucalyptus sp. e (Eucalyptus camaldulensis Dehnh. x E. grandis) mostraram potencial como hospedeiro para se criar S. neseri em L. invasa em laboratorio porque ate a emergencia do parasitoide adulto essas mudas nao murcharam. Quando criado de 25,1 a 26,0 [degrees]C, o numero total de parasitoides e a proporcao de parasitoides machos foram maiores, relativo aos hospedeiros criados de 26,1 a 27,0 [degrees]C. O pico de emergencia de S. neseri ocorreu aos 28 dias apos parasitismo. Palavras Chave: emergencia; praga exotica; vespa-da-galha; parasitoide; Africa do Sul