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9-11 November 2011,


MGPR 2011: Organized by Pesticide Science Laboratory Faculty of Agriculture, Aristotle University of Thessaloniki

7th International Symposium MGPR “Paolo Cabras”, Thessaloniki, Greece, 9-11 November 2011

Behaviour of avermectins in soil: mobility of eprinomectin in soil columns V. D. Litskas1, C.G.Paraskevas2, X. N. Karamanlis1, G. C. Batzias3 1

Laboratory of Ecology & Environmental Protection, Faculty of Veterinary Medicine, AUTh, Greece, ( 2 Laboratory of General & Agricultural Hydraulics & Land Reclamation, School of Agriculture, AUTh, Greece 3 Laboratory of Pharmacology, Faculty of Veterinary Medicine, AUTh, Greece

Eprinomectin (EPM) is an antiparasitic drug registeredfor use in cattle. It is highly toxic for the biota (e.g. Daphnia species, invertebrates and soil nematodes). The OECD‟s protocol 312 (Leaching in soil columns) was applied to examine its mobility in soil. EPM was placed on the top of three soil columns (diameter 10 cm and soil height 25 cm) while one column left untreated (control). Artificial rain [168 mL/day (21.4 mm/day) 0.01 M CaCl 2] was applied for 30 days and the drainage water was daily collected. A chloride pulse (0.018 M CaCl 2) was applied to determine the breakthrough curve which was simulated using CXTFIT code and the transport parameters for chloride were determined. The water content in soil columns assumed to be constant (saturated) in the whole profile. In order to avoid variations in soil water content the input pore velocity was always greater than output pore velocity. Pore water velocity (v) was 0.149 - 0.156 cm/h, dispersion coefficient (D) was 0.004 0.014 cm2/h and dispersivity (λ) was0.0286 - 0.0952 cm. EPM was not detected in the drainage water. EPM penetrated to a depth of 10 cm only in column 1, while in the other two columns 2 and 4 it was restricted in the top 5 cm. EPM concentration in the zone of 0 – 1 cm was 0.023, 0.018 and 0.019 nmol g -1 d.w.(20.84, 16.36 and 17.81 ng g-1 d.w.) in columns 1, 2 and 4, respectively. EPM concentration in the zone 1 - 5 cm was 0.013, 0.012 and 0.014 nmol g -1 d.w. (12.17, 10.66 and 12.79 ng g -1 d.w.) in columns 1, 2 and 4, respectively. An EPM concentration of 0.005 nmol g -1 d.w. (4.25 ng g-1 d.w.) at the zone of 5 - 10 cm was found only in column 1. The amount of EPM retained in the soil profile in the columns was 80.1% (s.e.: 4.2) suggesting that 20% of the substance was degraded and/or irreversibly bound in the soil after 30 days. Keywords: environment, pharmaceuticals, modeling, residues, leaching


Behaviour of avermectins in soil, Mobility of eprinomectin in soil columns (2011) [abstract]  

Litskas V.D., Paraskevas C.G., Karamanlis X.N., Batzias G.C. Poster at 7th International Symposium of Mediterranean Group of Pesticide Rese...

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