Cabbage, grown to maturity in soil treated with chlorfenvinphos 
did not contain detectable residues of the parent compound or its break- 
down products. Under the same conditions, carrots contained residues of 
unchanged chlorfenvinphos, a salt or conjugate of desethyl chlorfenvinphos, 
and traces of 2,4-dichloroacetophenone, Onion bulbs contained only 
chlorfenvinphos and the salt or conjugate of desethyl chlorfenvinphos (115). 
Chlorfenvinphos (1) was applied to the foliage of potatoes, cabbage 
and maize. Half was absent after 2 to 3 days. On cabbage there was some 
evidence of conversion of the trans (8) isomer to the cis (a) isomer. 
Compound V, the major metabolite as a sugar conjugate, and traces of 
desethyl chlorfenvinphos (II) were detected. Treated carrots contained 
traces of 2,4-dichloroacetophenone (IV) (116). 
Four different soils were treated with cl 4 _chlorfenvinphos and 
stored at 22° for four months. At that time, the soils were extracted. 
Thin-layer and gas chromatography detected the following metabolites: 
(II) desethyl chlorfenvinphos; (VII) 2,4-dichlorophenylethan--1,2-diol; 
(V) 1-(2,4-dichlorophenyl)ethan-1l-ol; (IV) 2,4-dichloroacetophenone; 
(III) 2,4-dichlorophenacyl chloride; and (XII) 2,4-dichlorophenyloxirane. 
An unidentified compound and salts or conjugates of desethyl chlorfenvinphos 
were also indicated (115, 116). 
In peat, the residues of 2,4-dichlorophenacyl chloride built up to 
a maximum of 0.11 ppm at 15 weeks after application at 8 lb/acre. The 
half-life in soils varied from 2 to more than 23 weeks, depending on soil 
type, formulation, and the dosage level (113). 

92 
