STUDIES OF GLOMERELLA FROM DIFFERENT HOSTS. 43 



formed. Though the cultures were kept for nearly a year, no peri- 

 thecia were ever found in them. The fungus agreed in all essential 

 particulars with Glomerella cingulata. 



MUSA PARADISIACA SAPIENTUM (l.) KUNTZ. (BANANA). 



Gloeosporium musarum Cke. and Mass. 



Cultures of this fungus, which is frequently found upon decaying 

 bananas, have been made at different times. The growth and appear- 

 ance of the fungus in cultures in most cases is somewhat different 

 from that of- the other forms grown. A slight amount of white 

 mycelium generally appears at first and soon becomes dotted with 

 small, dark bodies which suggest perithecia, but when carefully exam- 

 ined they prove to be small acervuli. The acervuli usually develop 

 in great numbers and, being crowded, produce large continuous masses 

 of salmon-pink spores. Chlanrydospores were very abundant in 

 some cultures. No setse were ever found. A few dark perithecium- 

 like bodies were occasionally found in old cultures, but no asci or 

 spores ever developed. 



Spore measurements obtained from conidia hi a single acervulus 

 in a culture were 9 to 28 by 4.5 to 6.5 /i. In other cultures conidia 

 were found reaching 34 p. in length and 8.5 jj. in thickness. With 

 no knowledge of the perithecial stage of this form, it is not pos- 

 sible to make any positive statements in regard to its identity with 

 the species of Glomerella from other hosts. In some cultures it 

 showed essentially the same characters and appearance as in the 

 forms from other hosts, while in others, as mentioned above, it showed 

 rather different characters. 



Most of the attempts to transfer the Gloeosporium on banana to 

 other fruits have been failures. Laubert (56) had no success in inocu- 

 lations from the banana to apples, though Cobb (21) reports success 

 in producing bitter-rot of pears and quinces with the banana fungus. 



OXYCOCCUS MACROCARPUS (AIT.) PERS. (CRANBERRY). 



Glomerella cingulata vaccinii Shear. 



This fungus has been found at various times on both fruit and 

 foliage of the cranberry and has already been reported on by the 

 senior writer (74) . More recently the perithecial form has been again 

 obtained in a number of cases from fruit collected in Massachusetts. 

 Cross-inoculation experiments with apples have given negative or 

 uncertain results. In one case a small decayed spot appeared, and 

 a few acervuli formed. It is possible that this variety would adapt 

 itself to another host in a few generations as some of the other forms 

 have done. 



252 



