236 



THE POME FRUITS 



sulphur, diluted 1 gallon of the concentrated commercial 

 lime sulphur solution to 35 gallons of water. 



Fly Speck or Sooty Blotch. — The fly speck or sooty blotch 

 is found on the apple in many sections. At first it was 

 thought the fly speck and sooty blotch were two separate 

 and distinct diseases, but further study has revealed the 

 fact that the fly speck and the sooty blotch are stages of 

 the same fungus. This disease is occasionally found on the 

 pear. Fly speck disease is quite superficial, and it appears as 



Fig. 105.— The apple blotch. 



a number of small black specks, quite regular in outline. 

 Each individual spot is about the size of a small pin head, 

 and in the earlier stage it is still much smaller. A mass of 

 the fungus gives the fruit the appearance of being covered 

 with soot. So far as injuring the fruit is concerned none 

 occurs, but the discolored fruit is hard to sell, and conse- 

 quently reduces the profits. Spraying for the scab will be 

 effective in controlling the fly speck. 



Fire Blight. — The fire blight is one of the most serious 

 diseases of the apple. It also is very injurious to the pear. 



