In a 2-yr study, residues of the herbicide linuron were determined by HPLC in asparagus which had been treated at two sites in British Columbia with both post- and preemergence applications at 1.1 and 2.2 kg ha−1. Maximum linuron residues detected in preemergence samples were in the order of 10 μg kg−1, whereas maximum residues in the postemergence samples were greater than 400 μg kg−1. Recoveries of linuron from fortified asparagus tissue were 92.2 ± 11.2% at the 10 μg kg−1 fortification level.Key words: Linuron, asparagus, preemergence application, residues, residue analysis
