Metodologias para avaliação da distribuição espacial da fusariose em pimenta-do-reino
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Data
2018-02-16
Autores
Brumat, Ana Carolina Lyra
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Editor
Universidade Federal do Espírito Santo
Resumo
The spatiotemporal study of plant disease analyzes the interaction between of the
pathogen, environment and the host, in which there are several methodologies
that can be used for this purpose. However, fusariosis is considered the main
fungal disease in bllack pepper crop, however there are still few epidemiological
studies of this disease. The objective of this study was to study the spatial
distribution of fusariosis in black pepper using different methodologies. Four
homogeneous areas of black pepper were monitored in the municipality of São
Mateus-ES, from December 2015 to December 2016. The presence or absence
of symptoms, as well as the position of each plant, were recorded in
spreadsheets and mapping the evolution of the disease in each area. For the
spatial study the data were analyzed by different methodologies: Dispersion Index
(ID), modified Taylor's Law, dynamics analysis and focus structure (ADEF), and
kriging. Data analysis by means of modified Taylor's law indicated aggregate
distribution only for area four. The ADEF showed that, with the evolution of the
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disease in the field, the outbreaks became larger and in smaller numbers. With
the use of geostatistics, it was possible to observe that the fusariosis is
disseminated at short distance, and that the foci obey a pattern of stretching.
Comparing the results obtained by the different methods, it is possible to observe
that the geostatistics has confirmed the results presented by the conventional
methodologies (modified Taylor law and ADEF), and that it has potential to be
used in the spatial study of plant diseases.
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Palavras-chave
Fusarium solani f. sp. piperis , Spatial epidemiology , Epidemiologia espacial , Geoestatística , Geostatistic , Piper nigrum
Citação
BRUMAT, Ana Carolina Lyra. Metodologias para avaliação da distribuição espacial da fusariose em pimenta-do-reino. 2018. 55 f. Dissertação (Mestrado em Agricultura Tropical) - Programa de Pós-Graduação em Agricultura Tropical, Universidade Federal do Espírito Santo, São Mateus, 2018.