Fate of the pyrethroid insecticide deltamethrin in small ponds: a mass balance study
The fate and distribution of /sup 14/C-radiolabeled deltamethrin (1(R)(la(S),3a)-cyano-(3-phenoxyphenyl)methyl 3-(2,2-dibromoethenyl)-2,2-dimethylcyclopropanecarboxylate) were monitored for 306 days, following a single application at 10 g/ha to two small outdoor ponds (17 m/sup 2/ surface area). Initial concentrations of the insecticide in filtered water ranged from 1.28 to 2.50 ..mu..g/L. Deltamethrin ((/sup 14/C)cyclopropyl acid or benzyl alcohol labeled) rapidly partitioned into suspended solids, plants, sediment, and air, with a half-life of 2-4 h in water. Duckweed (Lemna sp.) and a submerged pondweed (Potamogeton berchtoldi) accumulated deltamethrin concentrations ranging from 253 to 1021 ng/g, respectively, at 24 h posttreatment. Sediments were the major sink for radioactivity at 306 days posttreatment, and intact deltamethrin was present at concentrations ranging from 3 to 5 ng/g. Deltamethrin levels in air above the water ranged from 10-100 ng/m/sup 3/ during a 48-h monitoring period following application. Fathead minnows (Pimephales promelas) accumulated levels of extractable radioactivity 248-907-fold higher than concentrations in water 24 h posttreatment, but no fish mortality was observed.
- Research Organization:
- Freshwater Institute, Winnipeg, Manitoba
- OSTI ID:
- 6943474
- Journal Information:
- J. Agric. Food Chem.; (United States), Vol. 33:6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AQUATIC ECOSYSTEMS
CONTAMINATION
INSECTICIDES
ENVIRONMENTAL TRANSPORT
PONDS
AIR POLLUTION
BIOLOGICAL ACCUMULATION
CARBON 14 COMPOUNDS
DECOMPOSITION
EVAPORATION
FISHES
MASS BALANCE
MONITORING
SEDIMENTS
SINKS
TRACER TECHNIQUES
UPTAKE
ANIMALS
AQUATIC ORGANISMS
CHEMICAL REACTIONS
ECOSYSTEMS
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
MASS TRANSFER
PESTICIDES
PHASE TRANSFORMATIONS
POLLUTION
SURFACE WATERS
VERTEBRATES
520300* - Environment
Aquatic- Radioactive Materials Monitoring & Transport- (1989)