Data/hora: 25/06/2024 17:59:05

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