2Division of Agricultural Chemicals, Indian Agricultural Research Institute, New Delhi-110 012, India.
Division of Soil Science and Agricultural. Chemistry, Indian Agricultural Research Institute, New Delhi-110 012, India.
1Present address: Watershed Development and Soil Conservation, Paota ‘B’ Road, Jodhpur, Rajasthan-342 006, India.
Online published on 31 October, 2011.
The persistence of pendimethalin [N-(l-ethylpropyl)-3, 4-dimethyl-2, 6-dinitroaniline] and anilofos [S-[2-[(4-chlorophenyl)-(l-methylethyl) amino]-2-oxoethyl 0, 0-dimethyl phosphorodithioate] was studied in six tropical soils of varying physicochemical properties using gas-liquid chromatographic technique. Persistence of pendimethalin and anilophos was maximum in Alfisol-1 and minimum in Mollisol. The organic matter and soluble salt content played an important role in degradation. Dissipation of pendimethalin (5.78 - 77.08%) was less than the anilofos (64.13 - 97.75%) in different soils in 120 days. Kinetic analysis indicated that degradation of the two herbicides followed first-order reaction..
Persistence, degradation, herbicide, soil, physicochemical properties, half-life
