New York Agricultural Experiment Statiox. 237 



The next treatment was made May 16. The leaves were nearly 

 full grown, while the largest of the new canes were about eight 

 inches in height. The work of the fungus on the new canes was 

 now noticed for the first time; a few of the small characteristic 

 spots were seen on the new shoots where they grew close to a 

 diseased spot on an old cane. Immediately after this spraying 

 was given the severe spring rains set in which lasted intermit- 

 tently for 21 days. 



On May 30, a fourth spraying was given. It was noticed at 

 this time that the previous spraying had seriously injured both 

 the fruit and foliage. On looking about for a cause for the injury 

 it was found that the capacity of the measure that was used in 

 making the Bordeaux mixture had been mistaken, consequently 

 the mixture was made much stronger than was intended. The 

 injury was probably due to this fact as raspberries on the Station 

 plats that were sprayed throughout the season with Bordeaux 

 mixture, using one pound of copper sulphate to make eleven gal- 

 lons of the mixture, were not injured. Raspberry foliage was not 

 found to be particularly liable to injury from Bordeaux mixture 

 at this strength. However, as the new canes are the only parts 

 of the plants that need protection, the spray should be directed 

 toward them alone. 



A fifth treatment was given on June 21. The difference in the 

 amount of disease on the treated and untreated rows was very 

 noticeable at this time. Nearly every fruiting stem and new cane 

 on the unsprayed plants was attacked by anthracnose while in 

 the sprayed rows the appearance of the disease was much less 

 noticeable. 



After the fruiting season was over the old canes were removed 

 and burned, when the last spraying for the season was given on 

 August 9. 



The plantation was visited on November 22, when the plants of 

 both the sprayed and unsprayed rows were found to have made a 

 vigorous growth. The canes in the treated rows were nearly free 

 from disease while those that were not sprayed were still badly 

 affected. 



The yields of the different rows are given below in Table IL 



