Artículos de revistas
Environmental Fate of Trifluralin, Procymidone, and Chlorpyrifos in Small Horticultural Production Units in Argentina
Fecha
2014-05Registro en:
Querejeta, Giselle Andrea; Ramos, Laura Mabel; Hughes, Enrique Alejandro; Vullo, Diana Lia; Zalts, Anita; et al.; Environmental Fate of Trifluralin, Procymidone, and Chlorpyrifos in Small Horticultural Production Units in Argentina; Springer; Water, Air and Soil Pollution; 225; 5-2014; 1-13
0049-6979
1573-2932
CONICET Digital
CONICET
Autor
Querejeta, Giselle Andrea
Ramos, Laura Mabel
Hughes, Enrique Alejandro
Vullo, Diana Lia
Zalts, Anita
Montserrat, Javier Marcelo
Resumen
Pesticide biodegradation was studied in soil samples of a representative small periurban production unit (Moreno District, Argentina). The mean periods required for the 50% dissipation of chlorpyrifos (16 days±1 day), procymidone (3.7 days±0.6 day), and trifluralin (3.6 days±0.6 day) were significantly lower than those measured for reference soil samples of a close location, using doses similar to the manufacturer?s recommendation. A preliminary screening scheme for pesticide-degrading bacteria on horticultural soil allowed the isolation of nine culturable bacterial strains, eight of which belonged to Pseudomonas genus. In order to consider the influence of the variability of soil properties on the biodegradation results, humidity, organic matter, conductivity, pH, water retention volume, density, respiration, and total phosphorous content were studied for different soil samples, finding no significant differences in the performed analysis. Overall, although the horticultural activity alters the natural soil, pesticide contamination effects could be reversed by the autochthonous microbial community.