174 ILLINOIS ACADEMY OF SCIENCE 



Pickett, B. S., et al. 



1918. Spraying Apple Orchards in 1913 and 1914. 111. Agr. Exp. 



Sta. Bui. 206, p. 493. 

 Both Bordeaux mixture and lime-sulfur, used separately, 

 completely controlled sooty blotch in both seasons. 

 As high as 25% infection found in check plots. 

 Kempton, F. E. 



1919. The Origin and Development of the Pycnidium. 



Thesis for degree of Ph. D. U. of Illinois, 1918. (Accepted 

 for publication by the Bot. Gaz.) 

 A general discussion of pycnidial development with 

 many illustrated examples. 



