150 Report ok the Department of Botany of the 



fifth season. 



Three primings were made: on May 22, June 12 and July 5. 

 No record was made of the quantity of primings or the time re- 

 quired to do the work in the first pruning. The second pruning 

 required three hours and S 1 /^ large arm-loads of primings were 

 obtained.- The third pruning required l 1 /^ hours. The quantity 

 of primings was small. On many plants the fungus had become 

 firmly intrenched in the crown beyond the reach of the priming 

 knife. Also, it frequently happened that the point of attack was 

 so close to a cluster of branches that, in order to get below the 

 disease, it was necessary to remove the whole cluster of branches. 

 In such cases there was some loss of fruit. Picking was begun 

 on July 5. The total yield of the treated plats was 1,612V> quarts 

 (2,143!/^ quarts per acre) and of. the check plats l,628 1 /2 quarts 

 (2,165 quarts per acre). 



SIXTH SEASON. 



Only two primings were made in 1012 (May 15 and June 11). 

 The time required for the first pruning was five hours and ten 

 minutes. The quantity of primings amounted to about five large 

 arm-loads and consisted entirely of dead canes. This pruning 

 should have been made a few days earlier. In the second prun- 

 ing there were found 174 plants more or less diseased and the 

 fact that many of the affected canes were leafless showed that 

 they had been overlooked in the first pruning. The time required 

 for the second pruning was one hour and thirty-five minutes. It 

 was planned to make a third priming on July 18, but owing to 

 the condition of the foliage it had to be abandoned. Hot weather 

 and a light attack of anthracnose had brought about much tip- 

 burn and partial defoliation which made it very difficult to detect 

 diseased canes. Much of the fruit being sun-burned and shriveled 

 it was considered not worth while to measure the yield. Through- 

 out the entire period of the experiment canes attacked by cane- 

 borers were found only rarely. 



