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After application of dimethoate to roots, leaves, or stems of 
bean plants (Phaseolus vulgaris L.), extraction and chromatography 
indicated the presence of eighteen metabolites. Of these, eight were 
identified: des-N-methyl dimethoate, dimethoate oxon analog, dimethoate 
carboxylic acid, des-O-methyl dimethoate, des-O-methyl carboxylic acid, 
0,0-dimethyl phosphorodithioic acid, 0,0-dimethyl phosphorothioic acid, 
and dimethyl phosphoric acid (1732). 
Tomato plants were treated with homologues of dimethoate, and 
their half lives were determined (1697, 1698). 


x 
t 7° 
(CH,0), -P-S-CH,-~C7 
Re les 
G2—) 
x t1/2(biol.) | *1/2(pH=6@25°C) ®\E1/2 biol. 
I NH-CH 3 3.2 | 122 38.1 
La NH-CH 3 9.3 32.5 3.5 
II NH-C1,Hg(n) 2.5 168 67.2 
III wu-cuy~ “#3 2.9 | 165 56.9 
~ 
CH 
IV NH-C-(CH 3} 3 1.8 208 114 
IVa NH-C-(CH3) 3 | 6.7 105 15.7 
V -0H = -- -- 
Va -OH == -- a 

163 
