FOOD FOR PLANTS 



141 



scale, apple red bug, the tent caterpillar, the apple- 

 tree borer, the bud-moth, canker worms, leaf hopper 

 and the fruit-tree loaf roller are the most common. 



Other diseases include sooty blotch, fly speck, 

 blister canker, collar rot, fire blight, apple rosette, 

 and Baldwin spot. Limited space prevents a detailed 

 description of methods of control, but general spray- 

 ing recommendations are given. 



llOO-Acre Tonoloway Mountain Side Orchard of the Amer- 

 ican Fruit Growers, Inc., at Hancock, Maryland. 



Spraying. 



Perfect apples cannot be hoped for from trees 

 which have not been sprayed. There are five prin- 

 cipal sprays which are generally used: the Delayed 



