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Main Title Fate of Selected Herbicides in a Terrestrial Laboratory Microcosm.
Author Gile, Jay D. ; Collins, James C. ; Gillett, James W. ;
CORP Author National Heart, Lung, and Blood Inst., Bethesda, MD.
Year Published 1981
Report Number EPA-600/J-80-346;
Stock Number PB82-127523
Additional Subjects Pesticides ; Herbicides ; Metabolism ; Transport ; Laboratory animals ; Biological transport ; Pesticide residues ; Bioaccumulation
Library Call Number Additional Info Location Last
NTIS  PB82-127523 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 7p
Abstract The transport and metabolism of 14C-labeled herbicides (simazine, bromacil, trifluralin, and 2,4,5-T) applied as a foliar spray (0.28 kg/ha) was examined in a terrestrial microcosm chamber (TMC). These chemicals were compared to a reference compound, the insecticide dieldrin. The TMC contained a synthetic soil medium, Douglas fir and red alder seedlings, rye grass, numerous invertebrates, and a gravid gray-tailed vole (Microtus canicaudus). By 20 days posttreatment, total soil residues (parent and metabolites and bound residues) averaged 0.14 ppm for all chemicals. Except for dieldrin little extractable parent material was detected for any of the chemicals in the soil. Concentrations of 14C material in the rye grass shoots ranged from an average of 2.5 ppm for 2,4,5-T to 16.8 ppm for simazine. 2,4,5-T and trifluralin were more rapidly degraded than the other chemicals with 2,4,5-T present primarily as extractable metabolites. 14C materials of dieldrin was accumulated to a much greater extent than any of the herbicides in the invertebrates. While concentrations of all chemicals in the vole were low, 14C material from dieldrin and simazine was present at levels approximately twice those of the other chemicals. None of the chemicals could be detected in the ground water.
Supplementary Notes Pub. in Environmental Science and Technology v14(9) p1124-1128 Sep 80.
NTIS Title Notes Journal article.
PUB Date Free Form Oct 81
Category Codes 6T; 6F; 57Y; 68E
NTIS Prices PC A02/MF A01
Primary Description 600/02
Document Type NT
Cataloging Source NTIS/MT
Control Number 323807751
Origin NTIS
Type CAT