Identification of the phytosanitary status of trees using machine learning and very high spatial resolution images

Authors

DOI:

https://doi.org/10.17268/sci.agropecu.2024.013

Keywords:

precision agriculture, sick trees, citrus, Orange, Mexico, Unmanned aerial vehicle

Abstract

Tree diseases contribute to significant economic and food losses in the agricultural sector. Early detection of phytosanitary problems in trees with non-destructive methods is essential to guarantee sustainable orange production. This study presents the findings of a designed methodology conducted to identify diseased orange trees in an orchard situated in the citrus belt of Mexico, specifically in the Rioverde region of San Luis Potosi. To accomplish this, we captured images using a multispectral camera with very high spatial resolution, which was mounted on an unmanned aerial vehicle. These images were used to construct a georeferenced orthomosaic of the orchard. Six thematic classes were established to distinguish various health levels among the trees. We employed several supervised classification algorithms at the pixel level, including Random Forest (RF), K-Nearest Neighbor (KNN), Spectral Angle Mapper (SAM), Support Vector Machine (SVM), and Maximum Likelihood (ML). Considering the classification accuracy achieved by each algorithm, they can be ranked as follows: Maximum Likelihood (ML) with 88.10%, Support Vector Machine (SVM) with 77.38%, Spectral Angle Mapper (SAM) with 76.19%, K-Nearest Neighbor (KNN) with 64.68%, and Random Forest (RF) with 61.90%. These results successfully identified the phytosanitary status of all the trees in the orchard with an acceptable level of accuracy, providing valuable management information for the grower.

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Published

2024-04-08

How to Cite

Díaz Rivera, J. C., Aguirre-Salado, C. A. ., Loredo-Osti, C. ., & Escoto-Rodríguez, M. . (2024). Identification of the phytosanitary status of trees using machine learning and very high spatial resolution images. Scientia Agropecuaria, 15(2), 177-189. https://doi.org/10.17268/sci.agropecu.2024.013

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Original Articles