Effects of simulated rain on the transport of fonofos and carbofuran from agricultural soils in the three-part environmental microcosm
The effects of simulated rain on the transport and metabolism of (/sup 14/C)fonofos and (/sup 14/C)carbofuran from insecticide-treated soil through deeper insecticide-free soil layers into surface waters were studied under laboratory conditions in a three-component microcosm. Radiocarbon derived from both (/sup 14/C)fonofos and (/sup 14/C)carbofuran was transported with soil runoff water from the place of the insecticide soil application through previously insecticide-free deeper soil layers into aquaria water and its sediments. Due to the lower water solubility of fonofos, less of this chemical was transported with water than did occur with carbofuran. Water, after its percolation through insecticide-free soil, contained 1.3% and 15.3% of the originally applied fonofos- and carbofuran-derived radiocarbon and <0.1% and 9.1% of the originally applied insecticides in the form of fonofos and carbofuran, respectively. Exposure of mosquito larvae to runoff water, percolated water, and aquaria water from (/sup 14/C)fonofos-treated soils resulted in lower insect mortalities than did exposure of larvae to comparable water samples from (/sup 14/C)carbofuran-treated soils. Thirty-six days after the start of the experiments and 21 days after the last rain application, aquaria water plus sediments from (/sup 14/C)fonofos- or (/sup 14/C)carbofuran-treated soils contained a total of 1.3% and 6.0% of the originally applied radiocarbon, respectively, but no fonofos and less than 0.1% of the originally applied carbofuran.
- Research Organization:
- Univ. of Wisconsin, Madison
- OSTI ID:
- 6645929
- Journal Information:
- J. Agric. Food Chem.; (United States), Journal Name: J. Agric. Food Chem.; (United States) Vol. 35:2; ISSN JAFCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
550501 -- Metabolism-- Tracer Techniques
560300 -- Chemicals Metabolism & Toxicology
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
ARTHROPODS
ATMOSPHERIC PRECIPITATIONS
CARBON 14 COMPOUNDS
ENVIRONMENTAL EFFECTS
ENVIRONMENTAL TRANSPORT
FURANS
HETEROCYCLIC COMPOUNDS
INSECTICIDES
INSECTS
INVERTEBRATES
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
LARVAE
MASS TRANSFER
MICROCOSMS
MORTALITY
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PESTICIDES
RAIN
RUNOFF
SIMULATION
SOILS
SOLUBILITY
TRACER TECHNIQUES