FRUIT TREES 189 
CHERRIES 
There are early and late varieties of this fruit. In 
selecting trees try to obtain a succession. There are 
also sweet and sour cherries. The sweet kinds will de- 
velop into large trees and the sour will remain low- 
growing. Cherries will thrive on almost any kind of 
good soil, but it must be kept well cultivated while the 
trees are young. 
For aphis, use kerosene emulsion, quite strong, repeat- 
ing every three or four days. For slugs, apply hellebore 
and arsenate of lead. The sour kinds of cherries are less 
subject to attacks from fruit enemies than the sweet ones. 
If black knot appears, cut out and burn the affected 
parts to keep the disease from spreading. 
