50 PLANT DISEASES 



19,690 pounds of fruit, which sold for $625.87. This 

 year the same vineyard was treated seven times, as 

 follows : 



' (i) March i, simple solution of copper applied to canes 

 and posts. 



' (2) Just before blossoming, with Bordeaux mixture B. 



'(3) Just after the grapes had formed, with Bordeaux 

 mixture, same as 2. 



' (4) July, same as 2 and 3. 



'(5, 6, and 7) At regular intervals between July 10 and 

 August 25, with eau celeste. 



'The total cost of the foregoing treatment, including a 

 Eureka sprayer, was $112.52, divided as follows: 



Eureka sprayer, . . . $21.50 

 Material, . . . .38.52 

 Labour, . . . . 52.50 



The yield of fruit this season was 53,430 pounds, which 

 sold for $2181.39. Thus it will be seen that the yield 

 for 1890 (treated) exceeded that of 1889 (untreated) by 

 33,740 pounds, while there was a net increase in the 

 profits of $1555.52. 



' Turning now to another class of plant diseases, we will 

 give the results of a series of experiments personally con- 

 ducted the past two seasons in the nurseries of Franklin, 

 Davis, and Co., near Baltimore. In the spring of 1889 

 this firm set out a block of 50,000 pear seedlings with 

 the expectation of budding them the following July. As 

 a rule seedlings of this kind are attacked by leaf blight 

 (Entomosporium maculatum, LeV.) as soon as the foliage 

 appears, and in consequence it is a rare thing that more 

 than half of the buds take. In the hope of saving the 



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