52 PAEASITES BELONGING TO THE GENUS GLOMEEELLA. 



RUBUS OCCIDENT ALIS L. (BLACK RASPBERRY). 



Glomerella cingulata (Stonem.) S. and v. S. 

 Glomerella rubicola (Stonem.) S. and v. S. 

 Gloeosporium riibi E. and E. 



Diseased canes of black raspberry received from Shelbyville, Term., 

 were placed in a moist chamber. The diseased areas soon produced 

 typical acervuli with dark-colored setae. Later many perithecia of 

 Glomerella also appeared on the canes. 



On March 29 the surface of some of the diseased canes was disin- 

 fected as usual, and pieces of the discolored inner bark and wood were 

 transferred to flasks of sterile corn meal. These cultures produced a 

 growth of white mycelium but no acervuli. On April 17 perithecia of 

 Glomerella were present with mature asci and ascospores apparently 

 identical with those found on the canes in the moist chamber. 



Other cultures made from conidia on the same canes in the moist 

 chamber produced conidia but no distinct acervuli. Fertile perithecia 

 developed in large numbers over the entire surface of these cultures. 

 Other cultures from the same source and also subcultures continued to 

 produce fertile perithecia in abundance, but conidia were always few 

 and no distinct acervuli were found. Subcultures made from asco- 

 spores also produced an abundance of fertile perithecia, but no conidia 

 were found. Chlamydospores also occurred in these cultures. The 

 conidia found ranged from 10.5 to 18 by 5 to 6.5 /*. Ascospores 

 averaged about 15 by 6 /i. 



The perithecia! stage of this form was first produced in culture 

 by Stoneman (89). Several species of Physalospora and of Laestadia 

 have been described from Rubus which do not differ essentially 

 from this Glomerella, so far as the descriptions go. There seems to be 

 no way of separating this fungus from Glomerella cingulata. In the 

 absence of inoculation experiments showing that it will not pass to 

 the apple or other hosts it is referred to that species. 



RUBUS TRIVIALIS MICHX. (WHITE DEWBERRY). 



Gloeosporium rufomaculans (Berk.) Thiim. 

 Gloeosporium rubi E. and E. 



Early in May, 1909, specimens of white dewberries were received 

 from Macon, Ga. The fruit was soft and had a water-soaked appear- 

 ance, suggesting a fungous disease. After washing the berries 

 thoroughly in corrosive sublimate, cultures were made on corn meal 

 by transferring portions of the pulp from the berries. One of the 

 flasks to which pulp was transferred, developed a pure growth of 

 Gloeosporium of the usual appearance. The acervuli were numerous 

 and produced pinkish masses of conidia. Xo perithecia developed in 



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