Substances: Acrinathrin (YLFSVIMMRPNPFK-WEQBUNFVSA-N) Deltamethrin (OWZREIFADZCYQD-NSHGMRRFSA-N) Empenthrin (YUGWDVYLFSETPE-JLHYYAGUSA-N) Cypermethrin (KAATUXNTWXVJKI-UHFFFAOYSA-N) Systems: stream Keywords: stream pyrethroids