74 



The BuLLKTiiN. 



HYPOCHNOSE. 



Apple. — This is a disease which was described by the writer in the thirty- 

 second annual report of the North Carolina Agricultural Experiment Station. 

 It prevails particularly in the mountainous section of the State, and may be 



FiQ. 34 — Hypochnose, showing matting of leaves. 



recognized by cinnamon-colored bodies about one-eighth of an inch in diameter 

 found upon the surface of twigs which bear the diseased leaves. This disease 

 can be prevented by spraying as suggested above. 



BLIGHT. 



Pear. — Pear blight is recognized by sudden dying of the leaves and twigs. It 

 constitutes our worst pear disease. This disease is caused by bacteria which 

 exist in enormous numbers within the combium layer and tliere multiply, re- 

 sulting in the death of the part invaded. No satisfactory treatment is known for 

 this disease, and the only treatment which can be recommended is to cut out 

 and burn all twigs which are infected. The twigs sliould be cut fully a foot 

 below all signs of disease. By so doing many germs will be destroyed and the 

 amount of infection will be lessened. The best time to make the first inspection 

 is during the winter, and subsequent inspections and pruning should be made 

 every week. If the pruning knife should accidently pass into diseased wood it 

 might become ladened with the bacteria and thus infect the other twigs. It is 



