Variables: concentration Substances: Acrinathrin (YLFSVIMMRPNPFK-WEQBUNFVSA-N) Bifenthrin (OXCDWLBJSLVWHB-LKRLXIKPSA-N) Deltamethrin (OWZREIFADZCYQD-NSHGMRRFSA-N) Chlorpyrifos-methyl (HRBKVYFZANMGRE-UHFFFAOYSA-N) Cypermethrin (KAATUXNTWXVJKI-UHFFFAOYSA-N) Keywords: pyrethroids stream