Abstract

PESSOA, Maria C. P. Y. et al. Simulation of aldicarb and tebuthiuron movement in soils under banana and sugarcane crops in the semi-arid region of Brazil. Rev. bras. eng. agríc. ambient. [online]. 2003, vol.7, n.2, pp. 297-302. ISSN 1807-1929.  http://dx.doi.org/10.1590/S1415-43662003000200019.

This study presents the results of the movement tendencies of the tebuthiuron and aldicarb applied to sugarcane and banana crops respectively, through the soil profile in an area of the 'Submédio São Francisco' region, where the sub-surface water was found at 1.50 m depth. The soils analyzed were: Distrophic Red Yellow Latosol (Typic Haplorthox); Eutrophic Yellow Latosol (Typic Eutrorthox); Eutrophic Red Yellow Latosol (Typic Eutrorthox); Distrophic Red Yellow Podzolic (Typic Kandiustults -Soil ); Eutrophic Red Yellow Podzolic (Typic Haplustults); Alic Yellow Podzolic (Typic Kandiustults); Distrophic Yellow Podzolic (Typic Kandiustults); Eutrophic Yellow Podzolic (Typic Haplustults); Alic Gray Podzolic (Typic Haplohumults); Eutrophic Planosol (Typic Albaquults); Distrophic Quartzous Sand (Typic Quartzipsament); Alic Quartzous Sand (Typic Quartzipsament). The movement of each product was followed by simulation during a period of three consecutive years after only one application of the pesticide, in separate scenarios for specific crop and soil type. The results showed main tendencies of tebuthiuron and aldicarb leaching in the Eutrophic Yellow Latosol, Distrophic Quartzous Sand and Alic Quartzous Sand. There were no indications of risk to human health according to the directive 89/778/EEC-reference level for both products in the analyzed scenarios.

Keywords : simulation; water quality; potential of contamination; environmental impact.