286 



The Ohio Naturalist. 



[Vol. XIV, No. 6, 



uneven expansion cf tissues which brings about the revolutely 

 curled condition of the diseased foliage. During the summer 

 months the foliage may acquire a mottled appearance, at first a 

 light yellow, gradually changing to darker shades of green and 

 yellow and eventually transforming into a reddish-bronze hue. 

 See fig. 4. The severity of curl and variations and intensities of 

 color depend very greatly upon soil and climatic conditions. An 

 abundance of rain is unfavorable to the development of the above 

 symptoms, while hot and dry weather produce the more con- 

 spicuous cases. All diseased foliege, besides being curled and mot- 

 tled, is considerably smaller and never attains its natural size. 

 See fig. 3. In September or October it is not uncommon to find 



Fig. 5. Two-year-(il(l healthy Cuthbcrt rasjibcrry plants. 



considerable mottled foliage; the spots may vary from a yellowish 

 tinge to a bronze, in many cases not unlike mosaic disease in their 

 color, size, shape and location with reference to the vascular 

 system. See fig. 4. 



The berries mature from ten days to two weeks earlier than the 

 normal crop. They are small, often dcfonncd, lighter in color 

 than the normal berry, and when apparently rijjc are bitter, later 

 becoming in.sipid. If allowed to remain on the cane until they 

 become "dead ripe", they acquire a slight flavor, which is, however, 

 far from pleasant. In fa.ct the berries are so small and poor in 

 quality that berry pickers refuse to pick at the coistomary price 

 l)er quart and commission men will not handle the fruit on ac- 

 count of its inferior qualities. 



