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Simazine surface runoff water

The documented occurrence of pesticides in surface water is indicative that runoff is an important pathway for transport of pesticide away from the site of appHcation. An estimated 160 t of atrazine, 71 t of simazine, 56 t of metolachlor, and 181 of alachlor enter the Gulf of Mexico from the Mississippi River annually as the result of mnoff (47). Field appHcation of pesticides inevitably leads to pesticide contamination of surface runoff water unless runoff does not occur while pesticide residues remain on the surface of the soil. The amount of pesticides transported in a field in runoff varies from site to site. It is controlled by the timing of mnoff events, pesticide formulation, physical—chemical properties of the pesticide, and properties of the soil surface (48). Under worst-case conditions, 10% or more of the appHed pesticide can leave the edge of the field where it was appHed. [Pg.222]

The adoption of best management practices can reduce the storm-related runoff of atrazine, simazine, and other moderately soluble herbicides from fields into bodies of surface water. Several papers (Fawcett et al., 1994 Hirsch et al, 1997 USDA-NRCS, 2000 Krutz et al., 2005) note how these in-field practices can be beneficial to water quality. [Pg.446]

Preferential removal of an ethyl versus an isopropyl moiety is a concept that has been suggested by Leonard (1988). DIA occurs in surface water that has received parent atrazine, simazine, or cyanazine. DEA occurs in surface water that has received atrazine or propazine. The concentrations of DEA and DIA in surface water vary with the hydrologic conditions of the basin and the timing of runoff (Mills and Thurman, 1994 Thurman et al, 1994,1998a). [Pg.467]


See other pages where Simazine surface runoff water is mentioned: [Pg.368]    [Pg.261]   
See also in sourсe #XX -- [ Pg.458 ]




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