Geoestatística aplicada ao estudo da distribuição espacial de Tibraca limbativentris em arrozal irrigado por inundação
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Data
2015-06
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Resumo
ibraca limbativentris (rice stem bug) is an insect
highly injurious to the rice crop in Brazil. The aim of this research
was to define the spatial distribution of the T. limbativentris and
improve the sampling process by means of geostatistical application
techniques and construction of prediction maps in a flooded rice
field located in the “Planalto da Campanha” Region, Rio Grande do Sul (RS), Brazil. The experiments were conducted in rice crop
in the municipality of Itaqui - RS, in the crop years of 2009/10,
2010/11 and 2011/12, counting fortnightly the number of nymphs
and adults in a georeferenced grid with points spaced at 50m in
the first year and in 10m in the another years. It was performed
a geostatistical analysis by means adjusting semivariogram and
interpolation of numeric data by kriging to verify the spatial
dependence and the subsequent mapping population. The results
obtained indicated that the rice stem bug, T. limbativentris, has a
strong spatial dependence. The prediction maps allow estimating
population density of the pest and visualization of the spatial
distribution in flooded rice fields, enabling the improvement of the
traditional method of sampling for rice stem bug.
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Palavras-chave
Oryza sativa, Dispersão, Percevejo-do-colmo, Monitoramento, Oryza sativa, Dispersion, Rice stem bug, Monitoring
Citação
PAZINI, Juliano de Bastos; BOTTA, Robson Antonio; SEIDEL, Enio Júnior ; SILVA, Fernando Felisberto da ; MARTINS, José Francisco da Silva; BARRIGOSSI, José Alexandre Freitas; RÜBENICH, Rodrigo. Geostatistics applied to the study of the spatial distribution of Tibraca limbativentris in flooded rice fields. Ciência Rural, Santa Maria, v. 45, n. 6, p. 1006-1012, jun. 2015.