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CHLOROTHALONIL
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APPENDIX II
END POINTS AND RELATED INFORMATION
2. Fate and behaviour in the environment
20 December 2004
Field studies:
Lysimeter/Field leaching studies A 3 year field groundwater
monitoring study in North Carolina
(USA): application is 2.5 kg/ha, 8
times with 14 day interval, annual
average precipitation is approx.
1700 mm. In this study
chlorothalonil remained in the
upper soil layer (0-15 cm) and
SDS-3701 was found to a depth of
31 cm. Chlorothalonil, SDS-3701,
SDS-47525, and SDS-19221 were
not found in the groundwater.
However, SDS-46851 was found
in groundwater at depths of 5.8-
10.4 m in max. concentrations
from 1.8 to 10.1 µg/l.
A 2 year lysimeter study in
Munster (Germany): application is
0,99 kg/ha, annual average
precipitation is 910 mm, annual
average leachate is approx. 360
mm. In this study the highest
concentration measured in the
leachated could be attributed to
R417888 in a maximum of 24% of
radioactivity present in the
leachate during the first year.
Mean annual measured
concentrations are 9.3 µg/l and 7.4
µg/l a.i. equivalent for the two
lysimeters respectively. Based on
the relative molar mass of 1.23,
the averaged annual concentration
amounts to 10.3 µg/l.
R419492 was detected in the