CROP ENEMIES AND FRIENDS 



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When these withered, blackened leaves are seen, the twig bear- 

 ing them should be cut off some distance below the darkened place 

 which shows how far the disease extends. These twigs should be 

 burned in order to destroy the bacteria. The knife should be dis- 

 infected after each cutting, so as to keep from infecting healthy 

 wood. 



Courtesy of Connecticut Agricultural Station 



MUSKMELON VINE "WITH BLIGHT 



Rust. There are many forms of rust which affect different 

 plants. The rust of the apple is an interesting example of a fungus 

 which has two hosts, one affording it a summer home, the other 

 giving it winter quarters. 



The winter home of the fungus is the red cedar, on which it 

 forms what is called the cedar apple. In wet spring weather 

 these cedar apples are covered with jelly-like tissue, which is a 



