Toxicity of insecticide formulations to carp embryos reared in vitro.

Carp (Cyprinus carpio) eggs stripped and fertilized in vitro were subjected to commercial formulations of DDT, chlordane, dieldrin, endrin, diazinon, and Guthion? at concentrations of 0.001, 0.01, 0.10, 1.0, 5.0, and 10.0 ppm active ingredients. None of the chemicals significantly affected embryo viability at concentrations < 1 ppm, but all six resulted in about 50-100 percent mortality at 5 ppm. Chlordane at concentrations of < 1 ppm stimulated embryo development and reduced incuba- tion time by about one-third. Abstract: Carp (Cyprinus carpio) eggs stripped and fertilized in vitro were subjected to commercial formulations of DDT, chlordane, dieldrin, endrin, diazinon, and Guthion? at concentrations of 0.001, 0.01, 0.10, 1.0, 5.0, and 10.0 ppm active ingredients. None of the chemicals significantly affected embryo viability at concentrations < 1 ppm, but all six resulted in about 50-100 percent mortality at 5 ppm. Chlordane at concentrations of < 1 ppm stimulated embryo development and reduced incuba- tion time by about one-third.