Data/hora: 12/06/2024 04:34:49

Provedor de dados: 	82	
País: 	Brazil	
Título: 	Effects of egg age of Spartocera dentiventris (Berg) (Hemiptera: Coreidae) on parasitism by Gryon gallardoi (Brethes) (Hymenoptera: Scelionidae)	
Autores: 	Rocha,Luciane da; Kolberg,Roberta; Mendonça Jr.,Milton de S.; Redaelli,Luiza R.	
Data: 	2006-10-01	
Ano: 	2006	
Palavras-chave: 	Insecta; Egg parasitoid; Host-parasitoid interaction.	
Resumo: 	To evaluate the effect of egg age of Spartocera dentiventris (Berg) on the parasitism by Gryon gallardoi (Brethes), groups of 12 eggs of 2, 3, 4, 5, 6, 7, 8, and 12 days old were exposed to one female of G. gallardoi on a test tube, with the wasp observed for 2h subsequently. Later, the eggs were individualised and incubated (25 ± 1°C; 12h photoperiod) until adult emergence. To identify the preferred age, groups of 12 eggs of 1, 3, 5, 7 and 12 days of age were simultaneously exposed to a parasitoid female on an arena for 2h. These groups were also individualised and incubated until parasitism was confirmed. On all ages tested parasitism was at about 88.5 ± 2.64%, with a reduction in adult parasitoid emergence with age increasing (P &lt; 0.01). The development time increased with increasing egg age (P &lt; 0.01), with males developing faster. Parasitoid sex ratio for all ages tested was female-biased (0.49:1), with the proportion of males invariant with host age (P &gt; 0.05). When the egg groups were exposed simultaneously, the female preferred eggs one and three days old. The results indicate a preference of G. gallardoi for younger eggs of S. dentiventris, with host egg age exerting a negative effect on development time and offspring emergence of the parasitoid.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000500013	
Editor: 	Sociedade Entomológica do Brasil	
Relação: 	10.1590/S1519-566X2006000500013	
Formato: 	text/html	
Fonte: 	Neotropical Entomology  v.35 n.5 2006	
Fonte: 	info:eu-repo/semantics/openAccess