18 PARASITES BELONGING TO THE GENUS GLOMEEELLA. 



CARTOTA RUMPHIANA MART. (PALM). 



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



On January 29 leaves from a plant of this species, which was 

 growing in the greenhouse and which had produced leaves with 

 spots showing conidia of Glomerella, were placed in a sterile moist 

 chamber. On February 3 a number of the leaves showed acervuli 

 with conidia ranging from 13.5 to 25 by 4.5 to 6 fi. Setae were 

 present but not abundant. The conidiophores appeared to average 

 a little shorter than is usual with forms from other hosts, being 9 to 

 15 fi in length. On February 18 many mature perithecia agreeing 

 in practically all respects with Glomerella cingulata were found on 

 these leaves. Asci and ascospores are shown in Plate II, figures 28 

 and 28 a. 



The conidial form has apparently been described as Gloeosporium 

 nanoti Prill, and Delacr. (64). 



On February 7 cultures in corn-meal agar tubes were made by 

 transfer of spores from acervuli on the leaves in moist chamber just 

 described. Typical conidia and acervuli were formed in a few 

 days. These cultures were kept until July 7, but no perithecia 

 were ever found. 



CTNNAMOMUM ZEYLANICUM NEES. (CINNAMON). 



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



Leaves appearing perfectly healthy, taken from a greenhouse 

 plant of this species, were placed in moist chamber. The leaves 

 soon became discolored and several acervuli with conidia appeared. 

 The conidial form agrees with Gloeosporium ochraceum Patterson (62). 



On February 1 1 transfers of conidia were made from these acervuli 

 to corn-meal agar tubes. These produced large acervuli and ap- 

 pressoria. Though kept until July 7 no perithecia were ever found. 

 On April 30 more plates were poured from conidia from a leaf kept 

 in moist chamber. A few peritheciumlike bodies were found in 

 the plates on May 15. On May 23 some of these plates showed 

 perithecia with mature asci. Subcultures to corn meal in flasks 

 were made from the original tubes. These produced very few 

 conidia but many sterile peritheciumlike bodies. Chlamydospores 

 were also present. No asci were found in these cultures. 



CITRULLUS VULGARIS SCHRAD. (WATERMELON). 



Gloeosporium lagenarium (Pass.) Sacc. and Roum. 



On November 17, plates were poured, using conidia from an anthrac- 

 nose spot on a watermelon grown at Vienna, Va. Transfers from 

 plates to corn-meal agar tubes were made. Numerous acervuli soon 



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