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Multispectral radiometric monitoring of bacterial blight of coffee

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Abstract

Bacterial blight of coffee caused by Pseudomonas syringae pv. garcae shows great destructive potential in the main coffee producing regions in Brazil and worldwide. Remote sensing technologies can be used as an inexpensive and effective method to identify and monitor the disease. This study evaluated the potential of the Landsat 8 OLI/TIRS multispectral sensor for the spatial and temporal monitoring of coffee (Coffea arabica) affected by the bacterial blight. In a commercial coffee field in Minas Gerais State, Brazil, samples were collected from a grid of 85 points spaced from 35 to 50 m apart. Each sampling point consisted of five plants, being four plants distributed surrounding a central plant. The analyzes of the plant foliage, disease incidence, and disease severity were performed from January to December 2014 and correlated with 15 vegetation indices derived from a time series of 11 multispectral images. The brightness temperature of these images was calculated in order to indicate the area of the field more favorable to the occurrence of the bacterial blight of coffee. Vegetation indices were highly correlated with the incidence (r = 0.76) and severity (r = 0.52) of the disease. The brightness temperature aided in the mapping of areas with optimal temperature conditions for the occurrence of the disease. In general, the study demonstrated the potential of Landsat 8 OLI/TIRS images to identify and monitor crops affected by the bacterial blight of coffee.

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Acknowledgements

To the Neumman Kaffee Gruppe (NKG) for allowing implementing the experiments in their crops and providing the management logistics of these areas. To the technical support team and the Foundation for Supporting Research of the State of Minas Gerais (FAPEMIG) for funding the study.

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Correspondence to Marcelo Loran de Oliveira Freitas.

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Marin, D.B., de Carvalho Alves, M., Pozza, E.A. et al. Multispectral radiometric monitoring of bacterial blight of coffee. Precision Agric 20, 959–982 (2019). https://doi.org/10.1007/s11119-018-09623-9

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  • DOI: https://doi.org/10.1007/s11119-018-09623-9

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