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Environmental Concentrations of Agricultural Herbicides

2,4-D and Triallate

^a Environment Canada, 300-2365 Albert St., Regina, SK, Canada S4P 4K1
^b Research Center, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada T1J 4B1
^c Research Station, Agriculture and Agri-Food Canada, Regina, SK, Canada
^d Research Station, Agriculture and Agri-Food Canada, Regina, SK, Canada
^e Faculty of Engineering, University of Regina, Regina, SK

View larger version (42K): [in a new window]   Fig. 1. Atmospheric concentrations of 2,4-D measured at Dugouts 1 and 2 in 1989 and at Dugout 1 in 1990. The quantities measured on the filter and polyurethane foam (PUF)/XAD-2 resin cartridge are identified and the complete bar height represents the total quantity in the atmospheric sample.

View larger version (40K): [in a new window]   Fig. 2. Atmospheric concentrations of triallate measured at Dugouts 1 and 2 in 1989 and at Dugout 1 in 1990. The quantities measured on the filter and polyurethane foam (PUF)/XAD-2 resin cartridge are identified and the complete bar height represents the total quantity in the atmospheric sample.

View larger version (35K): [in a new window]   Fig. 3. Bulk deposition rates of 2,4-D measured at Dugouts 1 and 2 in 1989 and at Dugout 1 in 1990.

View larger version (34K): [in a new window]   Fig. 4. Bulk deposition rates of triallate measured at Dugouts 1 and 2 in 1989 and at Dugout 1 in 1990.

View larger version (19K): [in a new window]   Fig. 5. Atmospheric concentrations and bulk deposition rates of 2,4-D measured at Dugout 2, 1989, combined with weekly precipitation.

View larger version (20K): [in a new window]   Fig. 6. Atmospheric concentrations and bulk deposition rates of triallate measured at Dugout 2, 1989, combined with weekly precipitation.

View larger version (31K): [in a new window]   Fig. 7. Quantities of 2,4-D measured in surface film at Dugouts 1 and 2 in 1989 and at Dugout 1 in 1990 and triallate measured in surface film at Dugout 1 in 1990.

View larger version (39K): [in a new window]   Fig. 8. Concentrations of 2,4-D measured in the water of Dugouts 1 and 2 in 1989 and at Dugout 1 in 1990.

View larger version (34K): [in a new window]   Fig. 9. Concentrations of triallate measured in the water of Dugouts 1 and 2 in 1989 and at Dugout 1 in 1990.