Data/hora: 06/06/2024 17:12:07

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 27/03/2008
Data da última atualização: | 25/02/2015
Autoria: | SANTANA, D. L. de Q.; BURCKHARDT, D.
Afiliação: | Dalva Luiz de Queiroz Santana, Embrapa Florestas; Daniel Burckhardt Naturhistorisches Museum Entomologie Basel Switzerland.
Título: | Introduced Eucalyptus psyllids in Brazil.
Ano de publicação: | 2007
Fonte/Imprenta: | Journal of Forest Research, v. 12, p. 337-344, 2007.
DOI: | 10.1007/s10310-007-0035-7
Idioma: | Inglês
Conteúdo: | The presence of glaucous juvenile leaves and glossy adult leaves in the canopy of the heteroblastic plant Eucalyptus globulus Labill., is a source of within-tree variation that affects herbivory by three psyllid species (Ctenarytaina eucalypti Maskell, C. spatulata Taylor and Glycaspis brimblecombei Moore) (Homoptera, Psyllidae). In no-choice field experiments with adult female psyllids in clip-on cages, we compared (1) leaf-settling, honeydew production, and survival of the Ctenarytaina species on juvenile and adult leaves of E. globulus, (2) leaf-settling and survival of G. brimblecombei on juvenile and adult leaves, (3) leaf-settling and survival of the three species on waxy (untreated) juvenile leaves and de-waxed (rubbed) juvenile leaves, and (4) leaf-settling and survival of C. spatulata on juvenile leaves from which wax was repeatedly removed. Leaf-settling by C. eucalypti was significantly greater on juvenile than adult leaves, however, honeydew production and survival were equal on both leaf types. In contrast, leaf-settling, honeydew production, and survival by C. spatulata were significantly greater on adult than juvenile leaves. Similarly, leaf-settling and survival by G. brimblecombei were significantly greater on adult than juvenile leaves. Wax removal from juvenile leaves significantly increased leaf-settling and survival of C. spatulata and G. brimblecombei. Although wax removal decreased leaf-settling by C. eucalypti, it did not affect survival. Repeated removal of regenerating wax from juvenile leaves did not affect leaf-settling or survival of C. spatulata. These results suggest that the epicuticular wax of juvenile leaves plays a role in resistance to C. spatulata and G. brimblecombei, however other unknown factors are probably also involved.
Palavras-Chave: | Blastopsylla occidentalis; Ctenaryaina eucalyptii; Ctenaryaina spatulata.
Thesagro: | Eucalyptus spp; Praga.
Thesaurus Nal: | Glycaspis brimblecombei.
Categoria do assunto: | --
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (42703-1) - UPC - AP - DD -  -  -  - DIS