Abstract:
Herein, we report the results of a study aimed at estimating the potential of acetochlor for translocation into soybean
plants and groundwater and its retention in one of the most common soil in Romania. The chloroacetanilide herbicide
acetochlor was applied at three different dosages, i.e. 2.2 L ha-1
(Recommended dose), 3.1 L ha-1
(40%+Recommended
dose) and 3.96 L ha-1
(80%+Recommended dose) as a pre-emergent spray on soybean crop at 3 days after sowing in the
experimental field of Ezăreni – The Experimental Farm of the Agricultural University Iasi. Analyses were performed
using Gas chromatography mass spectometry (GC-MS). Extraction of field soil samples taken from different depths (0-
5, 5-10, 10-15 and 15-20 cm) at different times after herbicide application, showed that all applied doses moved deeper
and increased dose (80%+Rd) affected the persistence of acetochlor in the top layer increasing its half-life to 5 days.
Dissipation followed a first order kinetics. At harvest, soil and plant samples were found to contain acetochlor below
maximum residue limits (MRL) following the 80%+ recommended dosage
