Substances: Acrinathrin (YLFSVIMMRPNPFK-WEQBUNFVSA-N) Cyfluthrin (OFHFONYRMVKULH-WNYJFNBPSA-N) Empenthrin (YUGWDVYLFSETPE-JLHYYAGUSA-N) Cypermethrin (KAATUXNTWXVJKI-UHFFFAOYSA-N) Systems: stream Keywords: toxicity pyrethroids Insecticides