384 



JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 12 



Chart III. Plotted lines showing results of experiments similar to those in 

 chart II (same sprays and same strength) except for the addition of nicotine, 

 1-500 to each spray. Observe the decided increase in kiU of the eggs of 

 A. avenae, 97-100 per cent, when the various sprays were applied during 

 March 1918-1919. 



