*Medicinal and Aromatic Plants Section Department of Plant Breeding, CCS HAU, Hisar, 125 004, India E-Mail: vkmadan@hau.nic.in
Department of Soil Sciences, CCS HAU, Hisar, 125 004, India
Online published on 31 October, 2011.
The persistence of trifluralin was studied in alluvial soil varying in their clay and organic matter content using plexi-glass columns. The soil columns containing recommended dose of the herbicide were kept either under continuous ponding or a total of three wetting and drying cycles were given during 25 days. The amount of trifluralin residues found after 25 d of its application were maximum and significantly higher in upper 2 cm surface. Intermittent wetting and drying resulted in a very high persistence (90–99%) whereas, upon continuous ponding, the persistence of trifluralin decreased to 22–40 per cent. The result of the study indicated that the persistence of trifluralin was significantly affected by organic matter content of the soil.
Trifluralin, persistence, soil organic matter, flooded and non-flooded soils
