Adsorption, desorption and mobility of metsulfuron-methyl in Malaysian soils under oil palm plantation

B.S. Ismail and Chong Tet-Vun , School of Environmental and Natural Resource Sciences, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, Malaysia.


Metsulfuron-methyl adsorption, desorption and mobility in Malaysian soils under oil palm plantation, viz. Serdang Series, Sungai Buloh Series, Holyrood Series, Rengam Series, Lating Series and peat soil, were studied under laboratory conditions. The greatest adsorption of metsulfuron-methyl was observed in the peat soil. The highest Ka was in the soil with higher organic matter (OM). Adsorption was positively correlated with the OM contents (r = 0.9997). The Kd value of peat soil was higher than the other soils studied. On the other hand, desorption of metsulfuron-methyl was lowest in the peat soil. Based on Koc values, metsulfuron-methyl is considered mobile in soil columns whereby the residue is detected in the leachate.


Plant Protection Quarterly (2003) 18 (1) 2-5.