FUNGOUS DISEASES 255 



the wood fails to ripen, in which case the tree is very 

 liable to injury during the winter or to the attack of 

 the fire blight the following summer. 



Remedy Spraying as per the spraying calendars 

 of the stations will entirely overcome the disease. 



Fire Blight (Bacillus amylovorus) This is a 

 bacterial disease similar to the yeast plant in habit of 

 growth that develops rapidly in moist hot weather. The 

 minute cells (it is a one-celled plant) or spores enter 

 the tree through some soft tissues, possibly the pistil of 

 the flower, or some broken place where the bark has 

 opened by the growth of the inner cells, when, if the 

 weather is hot and the tree in the proper condition, it 

 grows very rapidly, requiring but a few days to spread 

 through an entire tree. The first appearance of the 

 disease may be the wilting of the .leaves of the branch 

 or branches attacked. Sometimes only a small branch 

 is attacked, while in others the attack may be on the 

 main branches, which cuts off circulation, and large 

 portions of the tree die. 



Remedy All diseased branches should be cut off 

 as soon as the disease appears, as far back as the wood 

 seems to be injured, and burned, and everything be done 

 that is possible to give the tree a vigorous, but sound 

 and hard growth of wood. Few trees will be injured 

 by this disease if they are properly protected from the 

 leaf blight during the summer. 



FUNGOUS PESTS ATTACKING THE PEACH 



Peach Scab or Black Spot (Cladosporium car- 

 pophilum) In seasons when there are frequent rains 

 and close moist weather this fungus is often destructive 

 to many varieties of peaches. It is more prevalent on 

 low land than where it is high and in full exposure to 

 air and sunlight. When the fruit is attacked early in 

 the season the growth of the parts affected is checked 



