Assessment of pesticide availability in soil fractions after the incorporation of winery-distillery vermicomposts Fernández Bayo, Jesús Dionisio Romero Taboada, Esperanza Schnitzler, Frauke Burauel, Peter Adsorption Pesticides Vermicompost Organic Carbon This study was financed by the “Comisión Interministerial de Ciencia y Tecnología” (CICYT) through projects REN2003-04693 and CTM2006-12214. J.D. Fernández-Bayo would like to thank the Science and Education Ministry for his FPI doctoral grant and Forschunzentrum Jülich where this work was carried out. We would also like to extend our thanks to Anita Steffen for her kind assistance. The influence of two vermicomposts from winery and distillery wastes on the distribution of diuron in agricultural soil was studied. Physical soil fractionations at 0, 9, 27, 49 and 77 days, allowed the quantification of pesticide residues in different particle-size fractions, coarse waste (WF), sand-sized (SF), silt-sized (SiF), clay-sized (CF) and dissolved organic matter-sized fraction (DOM). The SiF made a greater contribution to the formation of non-extractable residues in unamended soil, but when vermicomposts were added, new sorption sites in WF appeared, being higher for the more humified vermicompost V2. The dissolved organic carbon (DOC) increased with the addition of vermicompost, but the concentration of the desorbed 14C-radiochemical did not increase. Non-significant increment was observed with time for the non-extractable fraction with amendments. Diuron was transformed in all samples, although less than 0.5% was mineralized. The main effect caused by vermicomposts was a reduction in the availability of diuron in soil. 2026-01-30T12:15:23Z 2026-01-30T12:15:23Z 2008-07 journal article Fernández-Bayo J. D., Romero E., Schnitzler F.and Burauel, P. (2008) Assesment of pesticide availability in soil fractions after the incorporation of winery-distillery vermicomposts. Environmental Pollution 154, 330-337. https://doi.org/10.1016/j.envpol.2007.10.002 https://hdl.handle.net/10481/110526 10.1016/j.envpol.2007.10.002 eng http://creativecommons.org/licenses/by-nc-nd/3.0/ open access Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License Elsevier