
%0 Journal Article
%A Black, I. D. 
%A Pederson, R. N. 
%A Flynn, A. 
%A Moerkerk, M. 
%A Dyson, C. B. 
%A Kookana, R. 
%A Wilhelm, N. 
%T Mobility and persistence of three sulfonylurea herbicides in alkaline cropping soils of south-eastern Australia
%J Australian Journal of Experimental Agriculture
%D 1999/07/28
%V 39
%N 4
%P 465-472
%K 
%R https://doi.org/10.1071/EA98097
%U https://www.publish.csiro.au/paper/EA98097 
%X Biologically active residues of the herbicides metsulfuron-methyl, chlorsulfuron and triasulfuron were estimated with field pea bioassays in soil samples to 80 cm depth from 4 field trials in south-eastern Australia situated on neutral to highly alkaline soil. Residues were both mobile and persistent at low levels. Leaching occurred beyond the lowest sampling depth during the winter&#8211;spring growing season. Metsulfuron-methyl was the most mobile of the 3 herbicides. Plant-back experiments involving susceptible crop and pasture species on 2 of the sites showed that the rates of decline of these residues in the sampling zone were slower than might be inferred from label plant-back recommendations in 1 of 2 seasons. 
