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Environmental Concentrations of Agricultural Herbicides in Saskatchewan, Canada

Bromoxynil, Dicamba, Diclofop, MCPA, and Trifluralin

^a Environment Canada, 300-2365 Albert Street, Regina, SK, Canada S4P 4K1
^b Research Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada T1J 4B1 (present address: National Water Research Institute, 11 Innovation Boulevard, Saskatoon, SK, Canada S7N 3H5)
^c Deceased (formerly at Research Station, Agriculture and Agri-Food Canada, Regina, SK, Canada)
^d Retired (formerly at Research Station, Agriculture and Agri-Food Canada, Regina, SK, Canada)
^e Faculty of Engineering, University of Regina, Regina, SK, Canada S4S 0A2

View larger version (31K): [in a new window]   Fig. 1. Atmospheric concentrations of trifluralin at Dugouts 1 and 2 in 1989 and Dugout 1 in 1990.

View larger version (28K): [in a new window]   Fig. 2. Atmospheric concentrations of dicamba at Dugouts 1 and 2 in 1989 and Dugout 1 in 1990.

View larger version (28K): [in a new window]   Fig. 3. Atmospheric concentrations of bromoxynil at Dugouts 1 and 2 in 1989 and Dugout 1 in 1990.

View larger version (40K): [in a new window]   Fig. 4. Concentrations of dicamba in dugout water, bulk deposits, and the atmosphere at Dugouts 1 and 2 in 1989 and Dugout 1 in 1990. Trace concentrations in dugout water (<0.05 µg L–1) have been plotted as 0.03 µg L–1.

View larger version (39K): [in a new window]   Fig. 5. Concentrations of MCPA in dugout water, bulk deposits, and the atmosphere at Dugouts 1 and 2 in 1989 and Dugout 1 in 1990. Trace concentrations in dugout water (<0.05 µg L–1) have been plotted as 0.03 µg L–1.