1Department of Chemistry, G.B. Pant University of Agric. & Tech., Pantnagar-263 145, U.S. Nagar (Uttaranchal)
2Depattment of Plant Physiology, College of Basic Sciences and Humanities, G.B. Pant University of Agric. & Tech., Pantnagar-263 145, U.S. Nagar (Uttaranchal)
3Depattment of Soil Science, G.B. Pant University of Agric. & Tech., Pantnagar-263 145, U.S. Nagar (Uttaranchal)
4Department of Agronomy, College of Agriculture, G.B. Pant University of Agric. & Tech., Pantnagar-263 145, U.S. Nagar (Uttaranchal)
*Author for correspondence
Online published on 15 October, 2011.
The persistence and dissipation studies of 2,4-D herbicide in water at two fortification levels i.e. 1 µg ml−1 and 2 µg ml−1 were performed. The residue of 2,4-D in water at both the levels declined slowly upto 3 days and thereafter, rapidly upto 35 days. No detectable residue of 2,4-D (> 0.002 µg) was found at 42 and 60 days of incubation at either of the levels. Dissipation studies followed the first order kinetics, which could be better accounted by a biphasic pattern involving an initial slower and latter faster phase. Fish mortality was also observed which was relatively greater than 50% at 2 µg ml”1 fortification level as compared to 1 µg ml−1 of 2,4-D.
Persistence, 2,4-D Dissipation kinetics, Fish mortality
