218 



THE GRAPE 



Clean culture and thorough spraying will control this 

 disease to a large degree. The 4—4-50 Bordeaux mixture is 

 the most effective, and the first application should be given 

 about the time the young shoots are a foot long. The spray- 

 ing should be continued throughout the summer at intervals 



Fig. 100, 



-Black rot of the Niagara grape. (After Reddick, Cornell Bulletin 

 No. 293.) 



of two or three weeks until five or six sprayings have been 

 given. The number of sprayings that will be required will 

 depend largely upon the weather conditions. In regions 

 where the rain fall is abundant more spraying will be 

 necessary. 



