- 9 - 



Table 60— Percent kill of adult two-spotted spider ndtes 2 days after 

 being sprayed with various concentrations of N-substituted formamides 

 in acetone solution 



5 per- 1 per- 0«5 per- o.l per- 

 Formamide cent cent cent cent 



Formamide, N,N-dioctyl- 



100 



100 



100 



N-octyl- 



100 



92 



65 



N,N-dipentyl- 



100 



6k 





N-heptyl- 



100 



6k 





N,N-diputyl- 



100 



ft 





Formanilide, N-butyl- 



100 



35 





N-ethyl- 



100 



16 





Formaraide, N-(l-methylpentyl)- 



96 









N,N-diethyl- 



92 









N-butyl- 



72 



8 





N-sec-butyl- 



50 









N- (l-metbylbutyl ) - 



50 









N-isobutyl- 



kQ 









N,N-diisopropyl- 



36 









N-propyl- 



32 









N, N-dipr opyl- 



2k 









N-ethyl- 



18 









27 



Aramite (0 o 01 percent) 92 



