COMPORTAMENTO ESPECTRAL DE FOLHAS DE Eucalyptus globulus (Labill.) ATACADAS POR Mycosphaerella spp. NAS REGIÕES DO VISÍVEL E DO INFRAVERMELHO PRÓXIMO DO ESPECTRO ELETROMAGNÉTICO
| Autor: | Diogo Belmonte Lippert, Ana Caroline Paim Benedetti, Marlove Fatima Brião Muniz, Rudiney Soares Pereira, Carlos Alberto Biernaski Junior, Elder Finkenauer, Elias Fernando Berra |
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| Jazyk: | portugalština |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Ciência Florestal, Vol 25, Iss 1, Pp 211-219 (2015) |
| Druh dokumentu: | article |
| ISSN: | 0103-9954 1980-5098 |
| Popis: | The study aims to analyze the spectral behavior of leaves of Eucalyptus globulus attacked in four different severity levels by Mycosphaerella spp. in different positions in the canopy of the tree in the four seasons, considering two regions of the electromagnetic spectrum: visible and near infrared. The plant material was collected in all seasons, in different positions in the tree (base, middle and top of the canopy extract). In the laboratory, leaves were classified into four levels of severity (healthy, little, medium and heavy fire) and then made measurements of spectral reflectance measured with a spectroradiometer. The spectral behavior of Eucalyptus globules leaves is characteristic according to the severity degree of the disease, differing primarily in the other high levels of infection by Mycosphaerella spp. and differ mainly of healthy leaves and leaves which are little attacked, in both regions of the electromagnetic spectrum, this behavior occurs for different treetop positions and climate seasons, varying the amount of reflected energy. It is concluded that the reflectance of the Eucalyptus globules leaves attacked by Mycosphaerella spp. differs according to the position in the tree crown and the weather station when they were collected and to the advanced levels of disease severity. |
| Databáze: | Directory of Open Access Journals |
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