Distribuição Espacial Da Severidade Da Brusone Do Trigo Correlacionada Com a Fertilidade Do Solo E Produção

Abstract

This study analyzed the spatial distribution of wheat blast severity and verify its relationship with soil fertility and production using geostatistics. The experimental area comprised 19,500 m 2 , where 42 points were georeferenced and spaced on a regular grid 20 x 20 m. The wheat blast severity, soil fertility and production wheat were evaluated at each point. Five disease severity assessments were performed using a diagrammatic scale and data were integrated in the area under the disease severity progress curve (AUDSPC). There was negative correlation between production and AUDSPC, that is, the increase in the blast severity influenced the reduction in wheat production. The results of this study may help control blast more effectively, with directed application of fungicides. Therefore, geostatistics can contribute to reduce human and environmental contamination, and contribute to the sustainability of production.