Moore, Duane G.; Hall, James D.; Hug, Wayne L. 1974. Endrin in forest streams after aerial seeding with endrin-coated Douglas-fir seed. Res. Note PNW-219. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 14 p.
Extent and duration of endrin contamination in stream-water were determined after aerial seeding of two westernOregon watersheds with treated Douglas-fir seed. Detectableresidues of endrin were found in a steep gradient streamfor a period of less than 5 hours and in a slower flowingstream for 11 days. Endrin was again detected in the lowgradient stream during the high flaw of a winter storm 23days after seeding. Maximum concentrations measured werewell below reported 96-hour median tolerance limits forimportant fish species.
Keywords: Repellents (- animal damage control, waterquality, endrin, seeding (direct), Douglas-fir,Pseudotsuga menziesii.