Data/hora: 12/06/2024 14:19:49

Provedor de dados: 	42	
País: 	Brazil	
Título: 	A new concept for insect damage evaluation based on plant physiological variables	
Autores: 	Neves,Ademir D.; Oliveira,Ricardo F.; Parra,José R.P.	
Data: 	2006-12-01	
Ano: 	2006	
Palavras-chave: 	Photosynthesis; Economic level injury; Citrus; Coffee; Plant-insect interactions.	
Resumo: 	The objective of this study was to determine the damage levels caused by Orthezia praelonga Douglas, 1891 and Leucoptera coffeella (Guérin-Mèneville 1842), on rangpur lime and Obatã coffee leaves, respectively. Measurements were based on a new concept for the evaluation of the following plant physiological parameters: photosynthesis, stomatal conductance, leaf temperature and transpiration, and internal concentration of CO2 (by infrared analyzer). A negative correlation between infestation level and photosynthesis was found, where the negative inflexion point of the curve was considered as a reference for damage levels. The control level for O. praelonga is below the 7-13% limit for damaged leaf area (40 to 70 scales per leaf), while for L. coffeella it is below the 26-36% limit for the same variable. Photosynthesis provided the best correlation for this type of analysis.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000400015	
Editor: 	Academia Brasileira de Ciências	
Relação: 	10.1590/S0001-37652006000400015	
Formato: 	text/html	
Fonte: 	Anais da Academia Brasileira de Ciências  v.78 n.4 2006	
Fonte: 	info:eu-repo/semantics/openAccess