UNIVERSITY OF ILLINOIS 



Agricultural Experiment Station. 



URBANA, MARCH, 1899, 



BULLETIN No. 54. 



SPRAYING APPLE TREES, WITH SPECIAL REFERENCE TO 



APPLE SCAB FUNGUS. 



About eight months ago the Horticultural Department of the Illi- 

 nois Experiment Station issued a bulletin on orchard cultivation, which 

 closed with these words: " . . . . while other things have greater or less 

 effect upon an orchard's health and condition, the prime requisite to 

 successful orcharding in Illinois is thorough and systematic cultivation." 

 But while cultivation is the prime requisite, it is, after all, but one 

 requisite, albeit the chief; for besides the struggle for the conservation 

 of moisture in his orchard during drought, the orchardist has always 

 with him the struggle against the insects and fungous diseases which 

 prey upon his trees and fruit. The object of the present bulletin, then, 

 is to assist the Illinois fruit grower in his fight against these active ene- 

 mies of the orchard, and to point out to him, if possible, the best and 

 most effective means of warfare. 



The two enemies most menacing to the apple growing industry of 

 Illinois are the apple scab fungus and the codling-moth. They, in turn, 

 find their most deadly foes in Bordeaux mixture and Paris green. A 

 little investigation will readily determine whether or not it is worth while 

 for the Illinois apple grower to invest in spraying machinery and begin 

 the work of exterminating, or at least checking, these nuisances. 



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