October, '19] 



PETERSON: APHID EGGS 



383 



Chart II. Plotted lines showing superiority of concentrated liquid lime-sulfur, 

 1-9 and 1-6, over dry substitutes, 15 pounds to 50 gallons of water (dry lime 

 sulfur (S-W), "B.T.S." and "Soluble sulfur") in killing the eggs of .1. avenae. 

 1918-1919. 



