THE APPLE 



125 



Painting with white lead and pure raw linseed oil, smear- 

 ing the bark with the hme-sulphur wash, or covering it 

 with wire netting are efficient 

 means of preventing such 

 damage. 



Apple Scab 



Apple Scab is the most im- 

 portant fungous disease attack- 

 ing this crop. It is due to a 

 parasitic fungus that develops 

 upon both leaves and fruit, caus- 

 ing brownish discolorations on 

 the former and black, woody 

 patches on the latter. It causes 

 the loss of milUons of dollars 

 worth of apples every year. It 

 can be prevented by means of 

 dilute Hme-sulphur spray, which is preferred to Bordeaux 

 mixture because it causes no damage to the fruit. 



Oyster-Shell Scale 



