238 



Diseases of Economic Plants 



Extensive experiments were conducted for ten years by the 

 New York Experiment Station. The following table taken 

 from bulletin 349 summarizes the results: 



Ten years of business experiments made on farms in order 

 to determine the actual profits from spraying under farm 

 conditions gave the following results : 



In the Geneva and Riverhead experiments, rows sprayed 

 three times received Bordeaux mixture with Paris green 

 twice and Bordeaux alone once, the dates being July 3, 17, 

 and August 3. Other rows were sprayed six times, twice with 

 Bordeaux mixture and Paris green and four times with 

 Bordeaux alone, the dates being July 3, 17, August 3, 18, 

 and September 1, 16. Still other rows were not sprayed at 



