New York Agricultural Experiment Station. 243 



In some instances, however, where raspberries are grown as a 

 farm crop it will pay to fruit the plantation longer. Although 

 the plants have passed the period of greatest fruitfulness, it may 

 be that for a few seasons longer they will produce crops of fruit 

 that will pay better than any other crop the grower might be able 

 to put in their place. 



If anthracnose makes its appearance, the old canes should be 

 removed and burned immediately after the fruiting season is 

 over. If in the following spring the new canes are protected 

 with Bordeaux mixture, it is possible practically to free the plan- 

 tation from the disease. While the results obtained from these 

 experiments show conclusively that anthracnose of the black 

 raspberry can be successfully combated with Bordeaux mixture, 

 in no instance did the spraying prove profitable, and because of 

 this fact the question at once arises as to whether or not it will 

 pay to spray for this disease. In dealing with any plant disease 

 that does not do serious damage every season, it will pay to spray 

 in those instances only when there is danger of an attack that 

 will be severe enough to endanger the life of the plants or ma- 

 terially injure the crop of fruit. Each grower must decide this 

 point for himself. 



The following letter from Mr. Hosmer gives his estimate of the 

 treatment for raspberry anthracnose, which is based on the ex- 

 periments that were conducted at his place: 



" I am not cultivating raspberries so extensively as formerly, 

 but if I had known then what I have since learned of the disease 

 and the eflScacy of the treatment you have employed in my planta- 

 tion, it would have resulted in a saving to me of thousands of dol- 

 lars. I had thirty acres of fine bushes almost completely ruined 

 by the anthracnose in the midst of their prime. 



" Yours truly, 



'^S. A. HOSMER." 



When to spray. — No definite rule can be given as to the exact 

 time when the spraying should be begun or how long it should be 

 continued, since no two seasons will ever bring with them the 

 same conditions. The experiments carried on at Manchester dur- 



