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The aim of this study was to evaluate the influence of different sample grids in the preparation of Tibraca limbativentris probability maps, insect known as rice stem bug, at the end of the vegetative phase of flooded rice field in "Planalto da Campanha" Region, Rio Grande do Sul (RS), Brazil. The insect monitoring occurred in 13,7 ha rice crops plot, using 81 points georreferenced grid and equidistant 50 m. The number of bugs summed at adult and nymph phases, of each spot, was transformed, encoding the values to zero (0) (insect absence) and (1) (insect presence). From original study grid, it was performed the removal of points in order to establish other sample grids settings, being these: 50 x 100 m, 100 x 50 m and 100 x 100 m. A geostatistical analysis was performed through semivariogram fitting and the interpolation of numerical data by ordinary kriging. The proposed sample grids generated different models of spatial dependence when compared to original grid, wherein the grid of 100 m x 50 showed reasonable agreement with the original grid in occurrence probability mapping of T. limbativentris flooded in rice field.

Malhas Amostrais Aplicadas ao Mapeamento da Probabilidade de Ocorrência de Tibraca limbativentris em Arroz Irrigado