DISEASES OF SPECIAL CROPS 



POMACF]OUS FRUITS ^s 



The pomaceous fruit plants, owing to the fact that they 

 are long-lived perennials, that their products are standard and 

 of high value, that they are universally grown throughout the 

 United States, when subject to an injurious disease justify 



Fig. S. — Apple bitter-rot in early stages showing acerviili. 

 After Scott. 



careful consideration of the means of combating the disease 

 and the employment of even expensive methods to attain 

 the end. 



APPLE 



-^Bitter-rot -^"^•'^ (Glomerella cingulata (Stonem.) S. & v. S., 



Glceosporiuni) . The effect of the disease is seen upon both 



the fruit and the twig. Upon the fruit the rotten spot is 



31 



