Data/hora: 13/06/2024 04:19:03

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