Variables: concentration Substances: Cyphenothrin (FJDPATXIBIBRIM-UHFFFAOYSA-N) Empenthrin (YUGWDVYLFSETPE-JLHYYAGUSA-N) Chlorpyrifos-methyl (HRBKVYFZANMGRE-UHFFFAOYSA-N) Phenothrin (SBNFWQZLDJGRLK-UHFFFAOYSA-N) Keywords: stream pyrethroids