Data/hora: 26/07/2024 22:42:53

Biblioteca(s): 	Embrapa Gado de Corte.	
Data corrente: 	29/06/1996	
Data da última atualização: 	29/06/1996	
Autoria: 	HEWITT, G. B.	
Título: 	Fatores ambientais que afetam a sobrevivencia de ovos das cigarrinhas-das-pastagens durante a estacao seca, no brasil central.	
Ano de publicação: 	1986	
Fonte/Imprenta: 	Pesquisa Agropecuaria Brasileira, Brasilia, v.21, n.12, p.1237-1243, dez. 1986.	
Idioma: 	Inglês	
Notas: 	CNPGC. 	
Conteúdo: 	Spittlebug egg survival and hatching was compared in pastures where differences occurred in vegetative characteristics and grazing intensity. Egg samples were placed in pastures at the start of the dry season and recovered before hatching began. Significantly (P<0,005) more eggs were recovered from areas where litter was present than from bare soil areas. Mortality from predators and  scavengers was estimated at 73%. An addicional 34% of the eggs were desiccated and 35% were nonviabel. Egg survival was estimated to be 8,5% and  was greater im pastures with the following characteristics: 1)canopy height>30 cm; 2) abundant litter; 3) plant cover>50%; 4) minimal or no grazing. More predators, especially spiders (Araneida) were also collected from these types ofpastures. At onesite more eggs hatched in a high grass pasture (74%) than in a low grass pasture (59%). Although high grass may receive  less damage from spittlebug  feeding the disadvantages of maintaining grass>30 cmappear to outweigh the advantages.	
Thesagro: 	Entomologia.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Gado de Corte (CNPGC)	
Exemplares: 	CNPGC - (3719-1) - EMB - AP - -- - 630.5 -  - 630.5 - DIS