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Assessment of the Fate of Selected Adsorptive Pesticides at ADAS Rosemaund
Author(s) -
Turnbull A. B.,
Harrison R. M.,
Williams R. J.,
Matthiessen P.,
Brooke D. N.,
Sheahan D. A.,
Mills M.
Publication year - 1997
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/j.1747-6593.1997.tb00084.x
Subject(s) - trifluralin , pesticide , environmental science , soil water , loam , chlorpyrifos , hydrology (agriculture) , deltamethrin , subsoil , surface water , environmental chemistry , environmental engineering , agronomy , chemistry , biology , geology , soil science , geotechnical engineering
Abstract Data are presented on four pesticides applied to agricultural land at the Agricultural Development Advisory Service, Rosemaund, in the west of England. The farm covers a well‐defined and isolated water basin of cracking heavy clay loam soils drained by a single stream. Levels of the relatively particle‐bound pesticides trifluralin, deltamethrin, chlorpyrifos and fenpropimorph were measured in drainage water and field soils following application. Observed concentrations in water were generally below 1 μg/l with occasional peak levels exceeding 10 μg/l during storm rainfall events. Unexpectedly high peak levels of deltamethrin of around 2 μg/l highlighted significant bypass flow mechanisms from the surface soils during the autumn. Additional bioassay experiments showed that levels of chlorpyrifos, lethal to Gammarus pulex , reached the stream during spring 1993. The Rosemaund farm has been the site of a continuing investigation into the movement of agricultural pesticides to surface waters since 1987, and this report represents the final work conducted in the autumn of 1992 and spring 1993.