Adsorption, Movement and Distribution of Carbofuran in different Soils

Adsorption and movement of carbofuran (a systemic non-ionic nematicide/insecticide) was studied with 3 different soils (silt loam, loam and sandy loam) of alluvial origin. The adsorption isotherms and Freundlich constants were determined by using the batch shake technique. The distribution coefficient K_D values for the soils were determined by using the batch adsorption and soil column techniques, respectively. Carbofuran movement, in air dried and water saturated soil columns, by leaching the soii with distilled water was in rererse order of adsorption for all the soils studied. A heavy rainfall such as 915.54, 776.22 and 640.87 cm will be needed to leach carbofuran to 152 cm depth in silt loam. loam and sandy loam soils, respectively in field conditions.