-5- 



Table 1.-- Continued 





Concen- 



Mean 







tration 



mortality- 



Mean 



Adjunct 



at which 



caused by- 



allethrin 





tested 



mixture 



equivalent 





alone 



in 1 day 





Mg. per dl . Percent Mg. per dl. 



Series 3 



1/ 



Benz amide, N - cyclohexyl-p - ethoxy-— 

 N-diamyl-p-ethoxy- 

 N-dibutyl-p-ethoxy- 

 p - ethoxy-N - diisopropyl- 

 p - ethoxy-N - dipropyl 



Allethrin standard 



500 



2000 



2000 



2000 



2000 



200 



100 



50 



Required to demonstrate synergism 



Equation for allethrin standard, Y = 3.667X - 2.144 

 Heterogeneity factor, 8.5 



Series 4 



26.9 

 45.5 

 54.2 

 45.9 

 42.2 

 88.2 

 62.8 

 15.5 

 31.0 



59.8 

 82.6 

 94.8 

 83.2 

 78.2 



188 



109 

 46.1 

 65.1 



Benzam.ide, N-benzyl-p-ethoxy- 1000 31.2 



N-dibenzyl-p- ethoxy- 2000 48.2 

 p -ethoxy-N- (3 -isopropyl- 



aniinopropyl)'- 2000 35.4 



p- ethoxy-N- ( 3 -methoxypropyl)-2000 35.4 



p- ethoxy-N -( 3 - dimethyl - 



aminopropyl)- 2000 27.5 



Allethrin standard 200 90.5 



100 67.4 



50 25.2 



Required to demonstrate synergism 37.9 



Equation for allethrin standard, Y = 3.32 IX - 1.267 

 Heterogeneity factor, 1 



54.6 

 74.6 



59.4 

 59.4 



50.3 



193 



106 

 48.4 

 62.3 



