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Effects of Methylammonium and Urea Ammonium Nitrate on Foliar Uptake of Thifensulfuron in Velvetleaf (Abutilon theophrasti)

Published online by Cambridge University Press:  12 June 2017

Thomas H. Beckett  and
Edward W. Stoller
Thomas H. Beckett
Affiliation:
USDA-ARS, Agron. Dep., Univ. Illinois, 1102 S. Goodwin Ave., Urbana, IL 61801
Edward W. Stoller
Affiliation:
USDA-ARS, Agron. Dep., Univ. Illinois, 1102 S. Goodwin Ave., Urbana, IL 61801
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Abstract

Effects of ammonium and methylammonium on foliar uptake of 14C-thifensulfuron, in the presence of 0.2% nonionic surfactant by vol, into velvetleaf were investigated. Total 14C uptake into velvetleaf 24 h after treatment was only 15% without addition of nitrogen, but addition of 0.32 M NH4Cl, urea ammonium nitrate, or CH3NH2·HCl increased total 14C uptake to 31, 38, or 59%, respectively. Total 14C uptake 24 h after treatment was increased 3- and 4-fold by addition of 0.08 and 0.16 M CH3NH2·HCl, respectively, but was not increased further by greater CH3NH2·HCl concentrations. Although the increase in 14C uptake was followed by an increase in total 14C translocated, the relative amount of 14C translocated (expressed as a percentage of total 14C uptake) was not affected by nitrogen additives. Enhancement of uptake of 14C-thifensulfuron by CH3NH2·HCl was partially reversed by addition of 0.16 M CaCl2 to the application solution.

Keywords

Thifensulfuron, 3-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl]-2-thiophenecarboxylic acidvelvetleaf, Abutilon theophrasti Medik. ♯ ABUTHAmmoniumcalciumfertilizersspray additives
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 39 , Issue 3 , September 1991 , pp. 333 - 338
Copyright
Copyright © 1991 by the Weed Science Society of America 

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