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@ARTICLE{Karlsson:820898,
author = {Karlsson, Anneli Sofia and Weihermüller, Lutz and Tappe,
Wolfgang and Mukherjee, Santanu and Spielvogel, Sandra},
title = {{F}ield scale boscalid residues and dissipation half-life
estimation in a sandy soil},
journal = {Chemosphere},
volume = {145},
issn = {0045-6535},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2016-06162},
pages = {163 - 173},
year = {2016},
abstract = {The aim of this study was to analyze the environmental fate
of the fungicide boscalid in a sandy soil. Boscalid was
applied in spring 2010/11 to a cropland site in western
Germany. Three years after second application 65 undisturbed
soil samples were taken. Boscalid was extracted using
accelerated solvent extraction (ASE). Boscalid contents in
the plough horizon ranged between 0.12 and 0.53 with a field
mean of 0.20 ± 0.09 μg kg−1. These contents were
considerably lower compared to calculation using literature
DT50 values, whereby a concentration of 16.89 μg kg−1 was
expected assuming a literature DT50 value of 345 days.
Therefore, the measured field boscalid concentration only
yields $1.2\%$ of the expected value. To test whether the
unknown extraction efficiency, losses from spray drift and
interception can explain the mismatch between calculated and
measured concentrations all these uncertainties were taken
into account into calculations, but field concentrations and
DT50 were still lower as expected. Leaching to deeper
horizons was also studied but could not explain the
discrepancy either. Moreover, a short-term incubation
experiment using 14C labelled boscalid revealed also shorter
DT50 values of 297–337 compared to the 345 days taken from
literature. However, this DT50 value is still considerably
larger compared to the 104–224 days that were calculated
based on the field experiment. Our results indicate that
boscalid dissipation under field conditions is much faster
at agricultural sites with sandy soil type as expected from
laboratory incubation experiments.},
cin = {IBG-3},
ddc = {333.7},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {255 - Terrestrial Systems: From Observation to Prediction
(POF3-255)},
pid = {G:(DE-HGF)POF3-255},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000369196300022},
doi = {10.1016/j.chemosphere.2015.11.026},
url = {https://juser.fz-juelich.de/record/820898},
}