Effects of Zectran Insecticide on Aquatic Organisms in Bear Valley Creek, Idaho
- 1 April 1972
- journal article
- Published by Oxford University Press (OUP) in Transactions of the American Fisheries Society
- Vol. 101 (2) , 330-344
- https://doi.org/10.1577/1548-8659(1972)101<330:eozioa>2.0.co;2
Abstract
We assessed effects of the experimental insecticide Zectran(R) on aquatic organisms in Bear Valley Creek, Idaho in 1966. Hayden Creek drainage, nearby and not sprayed, served as a control. We found no significant fish mortality, and no effect on growth rate and condition of age 0+, 1+, 2+, and 3+ dolly varden (Salvelinus malma). Insecticide applications did not increase emigration and intrastream movement of fish. We noted no effects on benthic aquatic insect numbers, but observed that more insects drifted downstream for several hours beginning about 3 hours after spraying on 7 July 1966. Adult terrestrial insects, immature Heptageneidae and Rhyacophilidae, adult Chloroperlidae, and immature and adult Phryganeidae, Limnephilidae, and Blephariceridae increased in drift samples after spraying. We concluded that Zectran insecticide damaged aquatic organisms very little.This publication has 0 references indexed in Scilit: