Anais da Academia Brasileira de Ciências | |
A new concept for insect damage evaluation based on plant physiological variables | |
Ademir D. Neves2  Ricardo F. Oliveira1  José R.p. Parra2  | |
[1] ,Universidade de São Paulo Escola Superior de Agricultura 'Luiz de Queiroz' Departamento de EntomologiaPiracicaba SP ,Brasil | |
关键词: photosynthesis; economic level injury; citrus; coffee; plant-insect interactions; fotossíntese; nível de dano econômico; citros; café; interações planta-inseto; | |
DOI : 10.1590/S0001-37652006000400015 | |
来源: SciELO | |
【 摘 要 】
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.
【 授权许可】
CC BY
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
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