indicated the role of soil microorganisms in ipazine degradation. 
Some hydroxyipazine was found but this did not constitute the major 
degradation product (Hamilton and Moreland, 1963). 
Prometryne (2-Methylmercapto-4, 6-bis[i-propylamino] -S-triazine) 
When cotton plants were treated with cl4-labeled prometryne, 
labeled material accumulated in roots, stems, leaves, and lysigenous 
glands but no cl4o, was detected. Plants grown in solution culture 
did not give rise to hydroxypropazine. However, this compound 
was found in plants grown in soil (Whitenberg, 1965). Some soil 
microorganisms appear to degrade prometryne by oxidation of the 
methylmercapto group to a sulfoxide or sulfone (Gysin, 1962). 
A labeled triazine analog was administered to male Swiss albino 
rats. Analysis of plasma and urine by paper chromatography showed 
that only the 6-hydroxy derivative was formed (Angelucci et al., 
1965). 
Adsorption of simazine and atrazine by soil fits the 
Freundlich equation a=kc"™, wherein 
a = amount solute adsorbed 
c 
= conc. of solution 
k =f/constants for the 
n =} adsorbent and adsorbate 
(Talbert and Fletchall, 1965). 
163 
