-6- 



Table 1.-- Continued 





Concen- 



Mean 







tration 



mortality 



Mean 



Adjunct 



at which 



caused by 



allethrin 





tested 



mixture 



eijuivalent 





alone 



in 1 day 





■ 



Mg. per dl. 



Percent 



Mg.per dl 



Series 5 









Benzaniiide, N-butyl-4-ethoxy- 



2000 



51.7 



79.7 



2 '-chloro-4-ethoxy- 

 4-ethoxy — ' 



1000 



32.2 



56.0 



500 



31.8 



54.9 



4 - ethoxy-N - ethyl 



2000 



51.4 



79.2 



Piperidine, l-(p-ethoxybenzoyl)- 



2000 



41.8 



66.2 



Allethrin standard 



200 



88.3 



176 





100 



71.8 



115 





50 



22.7 



45.7 



Required to demonstrate svnergisni -- 





- 46.2 



72.3 



Equation for allethrin standard, Y = 3.342X - 1.309 

 Heterogeneity factor, 17.8 



Series 6 



Benzaniiide, 4'-chloro-4-ethoxy-— ' 

 Morpholine, l-(p-ethoxybenzoyl)- 

 Allethrin standard 



Required to demonstrate synergism 



Equation for allethrin standard, Y = 3.253X - 1.225 



Heterogeneity factor, 28.4 



333 



24.4 



50,0 



1000 



31.5 



58.2 



200 



84.7 



170 



100 



71.3 



122 



50 



19.6 



44.5 





-- 45.6 



75.8 



1/250 mg. per deciliter. 



