414 



Bulletin 76. 



The portions of the cluster first affected are, so far as my 

 observations go, invariably either the lower extremity of the 

 cluster as it hangs from the cane, or, in the case of heavily 

 shouldered clusters, the outer extremity of the stem forming the 

 shoulder. The shelling may begin at both points at about the 



Fig. 2. — Abnormal separation of berry from stem, as it occurs in shelling. 



same time, but it generally makes its appearance first at the lower 

 end of the bunch. Sometimes only one or two berries may fall, 

 but in other cases the drying and shriveling of the stem gradu- 

 ally extends upward, the afiected portion being plainly marked 

 by the absence of the berries, as shown in Fig. 2. It often 



