242 Report of the Horticulturist op the 



The rows, Nos. 1, 5, and 9 were sprayed once before the leaf 

 buds opened, with copper sulphate solution, using three po^mds 

 of the sulphate to eleven gallons of water. Rows No. 2, and 

 10 were spraj^ed once before the leaf buds opened, with a satu- 

 rated solution of iron sulphate. Rows No. 3, 7 and 11 were 

 sprayed for the first time when the rows that were sprayed with 

 the strong solution received the third treatment. Row No. 13 

 was sprayed for the first time when the rows that were sprayed 

 with the strong solutions received their second treatment. 



Dates of spraijing. — The first spraying, when the strong solu- 

 tions were used, was given on April 18, when the leaf buds were 

 beginning to swell. In the subsequent treatments Bordeaux 

 mixture was used on all of the treated rows. The second spray- 

 ing was given on May 2, when the canes were in nearly full leaf. 

 Row 13 was sprayed for the first time on this date. All of the 

 treated rows were sprayed on May 12, when some of the largest 

 of the new canes were about two feet high. Rows 3, 7 and 11 

 were sprayed for the first time on this date. The last spraying 

 for the season was given on June 3. 



Record of yields. — The record of yields for the season was not 

 complete, but it did not indicate that there was any increase in 

 yield on the rows that were sprayed. Neither did any of the 

 rows that received the different lines of treatment show any in- 

 crease in yield over that of their neighbors. 



The plantation was visited on Dec. 12, when it was found that 

 the difference in the amount of disease on the sprayed and un- 

 sprayed rows was quite marked. All of the rows that had been 

 sprayed were comparatively free from disease, while the un- 

 sprayed rows were still quite badly affected. The results were 

 suflBciently marked so that it is deemed advisable to continue the 

 experiment through another season. 



CONCLUSIONS. 

 Ordinarily it will not pay to keep a plantation of black rasp- 

 berries after it has produced its third crop. When such short 

 rotations are followed, and the best of culture is given, it would 

 seem that the danger from aiithracnose must be reduced to a min- 

 imum, providing the plants are free from disease when planted. 



