Table 3.--Selective toxicity of parathion analogs (23) 
[LD59 mg. per kg]] 



House fly, 
topical 

















Parathion anolog 

S 
I 
O5N cy» OP(OC>Hs)> -- 0.9 
i 
OoN & OP(OCH3)> ... 1.3 
S 
I 
oon {_\ OP(OCH3)> ... (mouse ) 2,000 (guinea pig) 156 
Cl 
S 
| 
O2N ‘@) OP(OCH3), -- Tas 
cl 
S 
ae 
cl’ Nor (OCH;)5 ..... Begs 
Cl 
S 
O5N € Sov(ocs;), 0% 6 2°6 
GE 
CHS € Nor(ocu3), ie 2.0 
i 
CHS ¢ Norcocx,), ap 


13 
