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Acute oral toxicities of wildland fire control chemicals to birds

January 1, 2009

Wildland fire control chemicals are released into the environment by aerial and ground applications to manage rangeland, grassland, and forest fires. Acute oral 24 h median lethal dosages (LD50) for three fire retardants (Fire-Trol GTS-R?, Phos-Chek D-75F?, and Fire-Trol LCG-R?) and two Class A fire suppressant foams (Silv-Ex? and Phos-Chek WD881?) were estimated for northern bobwhites, Colinus virginianus, American kestrels, Falco sparverius, and red-winged blackbirds, Agelaius phoeniceus. The LD50s of all chemicals for the bobwhites and red-winged blackbirds and for kestrels dosed with Phos-Chek WD881? and Silv-Ex? were above the predetermined 2000 mg chemical/kg body mass regulatory limit criteria for acute oral toxicity. The LD50s were not quantifiable for kestrels dosed with Fire-Trol GTS-R?, Phos-Chek D-75F?, and Fire-Trol LCG-R? because of the number of birds which regurgitated the dosage. These chemicals appear to be of comparatively low order of acute oral toxicity to the avian species tested.

Publication Year 2009
Title Acute oral toxicities of wildland fire control chemicals to birds
DOI 10.1016/j.ecoenv.2008.09.001
Authors N.B. Vyas, J. W. Spann, E. F. Hill
Publication Type Article
Publication Subtype Journal Article
Series Title Ecotoxicology and Environmental Safety
Index ID 5224917
Record Source USGS Publications Warehouse
USGS Organization Patuxent Wildlife Research Center