Revista Brasileira De Herbicidas 2017; 16(3): 238-245
Behavior of 2,4-D + picloram Latosol Red-Yellow
2,4-D and picloram are molecules much used in the control of weeds in pastures. Study the fate of these molecules in Amazonian soil is of extreme importance in assessing the potential for contamination of groundwater. The objective of the present work was to determine the leaching of increasing doses of 2,4-D + picloram herbicide in Dystrophic Yellow Red Latosol. For this, samples of this soil were used as substrate to fill PVC pipes with 10 cm in diameter and 50 cm in length. The treatments consisted of a combination of five doses 0.125; 0.25; 0.5 and 1.0% of one liter of the Tordon commercial product plus one control without application and six sampling depths in the columns (0; 8; 16; 24; 32 and 40 cm).The cucumber was used as bioindicator species where the following variables were analyzed: phytotoxification, plant height, root length and leaf area. The experiment was carried out in a completely randomized design with four replications. It was verified that leaching of the herbicide 2,4-D + picloram in Dystrophic Red-Yellow Latosol and that this one was more intense with the increase of the doses of the herbicides, arriving to be leached throughout the studied column.
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