Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering
Paginering:
Jaargang 17 (1982) nr. 1 pagina's 21-30
Jaar:
1982
Inhoud:
Three herbicides, trifluralin, (α,α, α- trifluoro-2, 6-dinitro-N,N-dipropyl-p-toluidine), profluralin (N-dyclopropylmeehyl)-α,α,α,-trifluoro-2, 6-dinitro-N-propyl-p-toluidine), and dinitramine (N4, N4-diethyl-α, α,α-trifluoro-3, 5-dinitrotoluene-2, 4-diamine) were incubated in an Etowah silt loam soil under laboratory conditions. The herbicides were incubated at 0.5 ppmw herbicide concentrations at 73 and 95°F, and for a time period ranging from 7 to 17 days. Three pH levels (5.3, 6.4, and 7.5) and three moisture contents (0, 50, and 100% FC) were generally used. Maximum disappearance of each herbicide occurred at the intermediate pH of 6.4. The herbicide losses were enhanced by increasing moisture contents and increasing temperature, and time. At 7 days incubation, at 507%FC moisture and soil pH of 6.4, herbicide dissipation at 73°F was in the order: Profluralin(=30%)> Trifluralin=Dinitramine (=20%).
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