8 EXPERIMENTS IN THE CONTROL OF GRAPE ANTHRACNOSE. 



treating black-rot of the grape, with 4-3-50, 4-2-50, or 3-2-50 

 Bordeaux mixture, the applications to be as follows: (1) When the 

 shoots are from 8 to 12 inches in length; (2) just before the flower 

 buds open; (3) immediately after the blossoms fall; (4) 10 days to 

 2 weeks after the third application; and (5) about 10 days to 2 weeks 

 after the fourth application. 



Trailers, consisting of lengths of hose with short extension rods 

 attached, so that the nozzles may be manipulated by hand, should 

 be used in the last two applications. The addition of 2 pounds of 

 rosin-fishoil soap to 50 gallons of spray mixture in the last two appli- 

 cations is advisable, as it greatly increases the adhesiveness of the 

 fungicide. 



Approved : 



James Wilson, 



Secretary of Agriculture. 



Washington, D. C, October 12, 1912. 



[Cir. 105] 



ADDITIONAL COPIES of this publication 

 -t\. may be procured from the Superintend- 

 ent of Documents, Government Printing 

 Office, Washington, D. C. , at 5 cents per copy 



