Abstract
Research was conducted to determine the effect of various sodium and ammonium salts on 14C-tralkoxydim absorption in oat. Sodium bicarbonate (12.5 and 25 mM) in the spray solution reduced 14C-tralkoxydim uptake in oat 1 h after herbicide application. However, ammonium sulphate overcame sodium bicarbonate inhibition of 14C-tralkoxydim uptake. Only sodium salts that increased spray-solution pH (bicarbonate or hydroxide) reduced 14C-tralkoxydim absorption in oat. These data indicate that spray solution pH plus the cation present in the spray solution influences tralkoxydim absorption. Key words: Tralkoxydim, absorption, antagonism, sodium, ammonium
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