120 



N. H. AGE. EXPERIMENT STATION 



[Bulletin 144 



diameter (Fig. 14). The depressions are somewhat hemispheri- 

 cal in shape. As they continue to develop they become more 



Fig. 15.— Fruit pit. Brown streaks in the flesh of the apple. 



highly colored than the surrounding portions and later take 



on various shades of brown. At first this coloration shows 



thru from rather 

 deeply seated tissue, 

 but later the surface 

 tissue also becomes a 

 dark brown. As the 

 disease advances, the 

 spots situated near 

 each other often be- 

 come confluent, devel- 

 oping into one large 

 spot or pit. The pro- 

 nounced depressions 

 in the later stages of 

 this disease are char- 

 acterized much better 



by the term pit than by that of spot. 



In late stages of the disease numerous spots of brown tissue 



are found in the flesh of the apple (Fig. 15). Closer study 



Fiti. 16.— A sketch of a portion of the vascular 

 .system of an apple. 



