Data/hora: 02/06/2024 06:52:11

Provedor de dados: 	82	
País: 	Brazil	
Título: 	Does the presence of weeds affect Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) infestation on tomato plants in a semi-arid agro-ecosystem?	
Autores: 	Bezerra,Mary-Ann S.; Oliveira,Maria R.V. de; Vasconcelos,Simão D.	
Data: 	2004-12-01	
Ano: 	2004	
Palavras-chave: 	Whitefly; Weeds; Host preference; Caatinga.	
Resumo: 	Integrated Bemisia tabaci (Gennadius) management requires quantitative knowledge on the mechanisms of persistence of pest populations in non-commercial host plants. We investigated B. tabaci oviposition preference among tomato and four weed species, and the insect population fluctuation under field conditions in the semi-arid region. At weekly intervals, we determined the level (number of eggs and nymphs per leaf) and the density of infestation (number of eggs and nymphs per leaf area) in all species. We observed an oviposition preference gradient among the species, with different degrees of attractiveness; Acanthospermum hispidum was the most infested species whereas Amaranthus deflexus was the least infested one. We also detected a significantly higher infestation on tomato when planted solely, which indicates a dilution effect on tomato infestation in the presence of weeds. Weeds can act as important reservoirs for whiteflies and/or their natural enemies or even as viral sources for cultivated plants. Their incorporation in integrated B. tabaci management programs depends on how those variables can be manoeuvred for the reduction of insect damage.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2004000600015	
Editor: 	Sociedade Entomológica do Brasil	
Relação: 	10.1590/S1519-566X2004000600015	
Formato: 	text/html	
Fonte: 	Neotropical Entomology  v.33 n.6 2004	
Fonte: 	info:eu-repo/semantics/openAccess