210 



AGRICULTURE FOR COMMON SCHOOLS 



the early blight. Thorough spraying with Bordeaux mixture 

 will control this disease. Spraying should begin when the 

 tops are about six inches tall. 



The leaves of peach-trees sometimes curl up, turn yellow, 

 and fall off. Another set of leaves soon comes out again. 

 This disease is called leaf curl. It is treated by spraying with 



39. A POTATO SPRAYER FOR BUGS AND BLIGHTS 

 This kind is useful in large fields 



copper sulphate solution before the buds open and afterward 

 with Bordeaux mixture. 



Peach Yellows is a disease in which the peaches ripen too 

 soon and have red streaks in them. The next year the leaves 

 come out in tufts and are yellowish in color. The cause is 

 not known, nor has any remedy been successful. The disease 

 will spread easily and all attacked trees should be cut down 

 and burned. 



4. Wilt. — Where flax has been grown for a number of 

 years on the same piece of ground without rotation, it usually 



