Abstract
Aclonifen (2‐chloro‐6‐nitro‐3‐phenoxyaniline) is a lipophilic pesticide (logKow = 3.98). It is strongly sorbed (Roc = 1700‐ 16,000 l/kg) and poorly translocated by soybean plant root. Aclonifen persistence was hardly affected by the soil water content, while the soil temperature affected persistence even less. Half‐life values were between 19.3 and 56.5 days. Field studies showed that aclonifen is quite persistent but a little mobile, and the use of models to calculate predicted environmental concentration confirm that it does not represent an hazard for the groundwater and soil quality. Only in very dry conditions and in presence of run‐off events aclonifen sorbed on sediment may reach and contaminate the surface water catchment systems.
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