-5- 



Table 2»— -Percent kill of larvae of the bean weevil subjected to 

 fumigation with 0.2 gram of N-substituted forraamide for 21-21* days 

 in 100-cc petri dishes 



Formsaide Percent- kill 



Formamid©, N,N-dipropyl- 100 



N,N-dibutyl- 95 



N,N-diethyl- 90 



N-ethyl- 57 



N-propyl- 50 



Formanilide, o-chloro- 1& 



Formamide, N~1sobutyl- Ii2 



N-butyl- Hi 



Formanilide, N-ethyl « 1U 



Formamide, N-sec -butyl- 



N-(l-methylbutyl)- 



N-(l-methylpentyl)- 



N-heptyl- 



N-octyl- 



N , N-diisopr opyl- 



N,N-dipentyl- 



N,N-dioctyl- 



N,N-dieenzyl- 



Formanllide, N-butyl- 



N-pentyl- 



N-isopentyl- 



ra-chloro- 



j>-chloro- 



2,5-dichloro- 



p_-Formanisidide 



£-Formophenetidide 



Carbon bisulfide (0,2 gram) 88 



