Data/hora: 27/07/2024 06:45:27

Biblioteca(s): 	Embrapa Unidades Centrais.	
Data corrente: 	08/12/1997	
Data da última atualização: 	08/12/1997	
Autoria: 	HEWITT, G. B.	
Afiliação: 	CNPGC.	
Título: 	Environmental factors affecting spittlebug egg survival during the dry season in central Brazil.	
Ano de publicação: 	1986	
Fonte/Imprenta: 	Pesquisa Agropecuaria Brasileira, Brasilia, v.21, n.12, p.1237-1243, dez. 1986.	
Idioma: 	Inglês	
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<0.05) 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 additional 34% of the eggs were desiccated and 35% were nonviable. Egg survival was estimated to be 8,5% and was greater in 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 of pastures. At one site more eggs halched in a high grass pasture (74%) than in a low grass pature (59%). Although high grass may receive less damage from spittlebug feeding the disadvantages of maintaining grass > 30 cm appear to outweigh the advantages.	
Palavras-Chave: 	Araneida; Spider.	
Thesagro: 	Aranha; Brachiaria Decumbens; Deois Flavopicta; Zulia Entreriana.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Unidades Centrais (AI-SEDE)	
Exemplares: 	AI-SEDE - (19631-1) - UMT - AP - -- -  - P474 - 63072081 - DIS