Monitoring of eucalyptus sprouts control using digital images obtained by unmanned aerial vehicle |
| |
Authors: | Caique Carvalho Medauar Samuel de Assis Silva Luis Carlos Cirilo Carvalho Rafael Augusto Soares Tibúrcio Julião Soares de Souza Lima Paullo Augusto Silva Medauar |
| |
Institution: | 1. Department of Agricultural and Environmental Sciences, State University of Santa Cruz, Ilhéus, Bahia, Brazilcaiquemedauar@hotmail.com;3. Department of Rural Engineering, Federal University of Espírito Santo, Alegre, Espírito Santo, Brazil;4. Department of Agricultural and Environmental Sciences, State University of Santa Cruz, Ilhéus, Bahia, Brazil;5. Department of Research and Development, Veracel Celulose S/A, Bahia, Brazil;6. Department of Agricultural, Environmental and Biological Science, Federal University of the Rec?ncavo of Bahia, Cruz das Almas, Bahia, Brazil |
| |
Abstract: | This study evaluated the effectiveness of chemical control for eradicating eucalyptus sprouts using images obtained with Unmanned Aerial Vehicle (UAV). The study was carried out in eucalyptus plantations in Itabela, BA, in replanting areas during pre-planting application of herbicide. Aerial images obtained by a UAV were used to evaluate the effectiveness of the herbicide application for sprouts control. After the images were acquired, they were processed to calculate the normalized difference vegetation index (NDVI) and submitted to a supervised classification to quantify the percentage reduction of sprout green matter. The percentage data were submitted to analysis of variance and the means were compared by Tukey test at 5%. The differences, both visual and average percentages were observed only during the evaluation period with no evident effect of the treatments on sprout control. The images provided by the UAV allowed to monitor and identify visually the plots where biomass reduced or increased and to evaluate the effectiveness of chemical control of eucalyptus sprouts, indicating areas where it was nonexistent, partial or total. |
| |
Keywords: | Geoprocessing spraying precision silviculture |
|
|