Data/hora: 05/06/2024 08:36:23

Provedor de dados: 	82	
País: 	Brazil	
Título: 	Effect of Host Plant on the Fecundity of Spittlebug Deois flavopicta Stal (Homoptera: Cercopidae): Implications on Population Dynamics	
Autores: 	SUJJI,E.R.; PIRES,C.S.S.; FONTES,E.M.G.; GARCIA,M.A.	
Data: 	2001-12-01	
Ano: 	2001	
Palavras-chave: 	Insecta; Population dynamics; Reproductive biology; Insect-plant interaction; Population outbreaks.	
Resumo: 	The spittlebug Deois flavopicta Stal (Hom.: Cercopidae) occurs naturally on native grasses in Central Brazil in low population densities. After the introduction of African grasses, mainly of the genus Brachiaria, for cattle raising, D. flavopicta began to produce population outbreaks and became a pest. Two studies were conducted, aiming to estimate the effects of a native and an exotic host plant on the fecundity of this insect. Females of D. flavopicta maintained during the adult stage on Brachiaria ruziziensis produced more eggs and lived longer than those maintained on Axonopus marginatus (a native grass widely distributed in Brazil), independently of the host plant on which the nymphs were reared. Due to the severe damage produced by adult D. flavopicta on the host plant, the effect of insect density on its own reproductive capacity was evaluated in oviposition cages containing plants of B. ruziziensis, standardized in height and stem number. Densities of one, two, three, four and six couples with virgin females were evaluated. Population densities of three couples, equivalent to 150 adults/m², or higher decreased insect's fecundity. These results contributed to the understanding of the mechanisms that determine low levels of spittlebug populations in the native grasses and promote population outbreaks in introduced ones.	
Tipo: 	Info:eu-repo/semantics/other	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2001000400006	
Editor: 	Sociedade Entomológica do Brasil	
Relação: 	10.1590/S1519-566X2001000400006	
Formato: 	text/html	
Fonte: 	Neotropical Entomology  v.30 n.4 2001	
Fonte: 	info:eu-repo/semantics/openAccess