ALDICARB TRANSPORT IN DRAINED COASTAL-PLAIN SOIL

The pesticide aldicarb is extremely soluble in water, which causes it to be mobile in ground water. A field study was conducted to monitor t he fate of aldicarb in a poorly drained soil in the North Carolina coa stal plain. The research site consisted of three experimental plots wi th three water-table management treatments: conventional drainage, con trolled drainage, and subirrigation. Surface and subsurface drainage r ates were measured continuously and water-table elevations were monito red in each plot. A total of 651 soil and water samples were collected over a six-month period. Aldicarb degraded to nontoxic compounds with a half-life of approximately 7 days. The maximum aldicarb loss throug h drainage outflow and surface runoff was 0.02% and 0.05% of total app lied aldicarb, respectively.