SWEP (Methyl N-[3,5-dichlorophenyl] carbamate) 
In green house studies SWEP was applied to rice, carrots, oats, wheat, 
corn, and barnyard grass. There were indications that trace amounts of 
SWEP were hydrolyzed in soil to 3,4-dichloraniline. However, it was found 
that most of the herbicide was immobilized and bound as a lignin complex 
(Chin et al., 1964). 
0 
i 
—_———Se—— SWEP-Lignin 
Comp lex 
SWEP 
TCA (Trichloroacetate) 
c714.1apeled trichloroacetate was applied to corn and pea plants. 
TCA itself, but no metabolic products, was found (Blanchard, 1954). 
In soil, microorganisms degraded trichloroacetate after a lengthy 
period of adaptation. Dechlorination occurs with probable formation of 
oxalate (Jensen, 1957; Hirsch and Alexander, 1960). 
151 
