
indicating entrance into the organism or adsorption of the herbicide to 
cell walls. The fungus, Cephalosporium sp., showed little or no degra- 
dation of paraquat whereas an unidentified bacterium produced at least 
two degradation products (Bozarth, 1965). 
Paraquat is not metabolized in plants but breaks down in sunlight to 
methylisonicotinic acid and methylamine hydrochloride. Animals excrete 
paraquat unmetabolized (Slade, 1965). 
CHA pr en poas atc rs ar H. 
Paraquat incre CHAN O 
| 3 
| C 
101 
