Small Fruits 



133 



Moisture and heat favor the development of the fungus, 

 while moisture upon the leaves is essential to infection. 

 Weather favorable to infection followed by hot, dry days 

 may be attended by great injury. Heavy, wet, undrained 

 soil also conduces to disease. 



Fig. 69. — ■ Strawberry leaf-spot. After Freeman. 



Frequent change of beds; also cutting, gathering, and 

 burning or burying of tops in place after harvest, and the use 

 of Bordeaux mixture after the removal of the diseased leaves 

 will lessen the infection of the next year. 



Hume in Florida found that l)y means of three early spray- 

 ings of 4-4-40 Bordeaux mixture, the disease was so checked 

 that "it was a difficult matter to find a leaf at all diseased in 

 the whole patch." Later, when tlie disease began to make 

 headway again, another spraying controlled it. 



