Substances: 2.4-D (OVSKIKFHRZPJSS-UHFFFAOYSA-N) MCPA (WHKUVVPPKQRRBV-UHFFFAOYSA-N) metolachlor (WVQBLGZPHOPPFO-UHFFFAOYSA-N) terbutryn (IROINLKCQGIITA-UHFFFAOYSA-N) Keywords: Chemcatcher monitoring