dimethylphosphate and N,N-dimethylacetoacetamide; cleavage of a methyl- 
phosphate bond to form desmethyl bidrin and methanol; and hydrolysis of 
the amide bond to form bidrin acid and dimethylamine. One plant 
metabolite was not identified, leaving a gap in the metabolic path of 
bidrin in plants (Bull and Lindquist, 1964). 
After injection into the stems, bidrin-P32 and SD 9129-p32 were 
rapidly translocated in bean plants and persisted for several weeks under 
greenhouse conditions. Half-life values for bidrin and SD 9129 were 9 
and 14 days respectively. Administration of bidrin yielded SD 9129 end 
traces of the N-methyl-N-hydroxymethylamide. SD 9129 was identified by 
I. R. Following SD 9129 administration, traces of the mono-N-hydroxy- 
methylamide and the unsubstituted amide were present at 8 days but only 
SD 9129 was present after 20 days (Menzer and Casida, 1965). 
The same pathway occurs, at least in part, in all organisms tested. 
The relative amounts of the metabolites were dependent on the experimental 
organism and the administered compound. In hen eggs injected with bidrin, 
all products except the N-methyl-N-hydroxy methylamide of bidrin were 
detected (Menzer and Casida, 1965). 
In moist soil, bidrin leaches readily and breaks down rapidly 
(Corey, 1965). 
40 
