REPORT OF COMMITTEE ON PUBLICATION 115 



Seedless, Malaga, Tokay and Black Hamburg are the most seriously injured 

 in Texas. Vialao gives a list of susceptible and resistant varieties of 

 European grapes. 



The fungus Sphaceloma ampelinum De Bary has been renamed and de- 

 scribed by other mycologists and pathologists and transferred at different 

 times to different genera. One of the latest researches on the morphology 

 and biology of the fungus is that of Viala and Pacottet.9 These authors have 

 decided as the result of their investigations that the fungus is an Ascomycete 

 and have established for it a new genus, Manginia. They describe several 

 different spore forms which they obtained in cultures. These include what 

 they call a yeast form which produced asci and ascospores. They also de- 

 scribe various forms of resting spores and cysts; also a spermogonial form; 

 and a macroconidial form arising from sclerotia but no perithecia were pro- 

 duced. These results have not yet been verified by other investigators. This 

 would seem desirable, however, in view of the remarkable diversity of the 

 various spore forms described and the present lack of knowledge of any 

 organism having a similar variety of metagenetic stages or spore forms. The 

 writer has grown Sphaceloma in pure culture on agar at various times for 

 long periods but has not yet observed any of the various spore forms de- 

 scribed except the ordinary microconidia and bodies resembling clamydo- 

 spores, or resting spores of various shapes and sizes. This however, is not 

 offered as evidence that other forms do not occur under other conditions or 

 on other media. 



Assuming the accuracy of their work the need of a new generic name 

 for the organism is still not clear to us. 



It is interesting in this connection to note the recent report by Burk- 

 holderio of the discovery of the ascogenous form of the anthracnose of 

 raspberries and blackberries. This has been shown to be a Discomycete 

 closely related to Plectodiscella piri Woronichin.n A very close resemblance 

 in pure cultures between the anthracnose fungus of the grape and that of the 

 Rubus species has attracted our attention and suggested the possibility of a 

 close relationship, if not identity of the organisms. Cross inoculation experi- 

 ments have been planned by the writer to determine whether these organ- 

 isms will pass from one host to another. The appearance and morphological 

 characters of the two organisms in culture are so similar that it is difficult to 

 separate them in this condition. There is also considerable similarity be- 

 tween the cankers produced on the different hosts. No fructifications of an 

 ascomycetous fungus resembling the Plectodiscella on raspberry has yet 

 been discovered on grape vines affected with anthracnose. If the anthrac- 

 nose of grape and of Rubus species should prove to be the same it would 

 have an important bearing upon studies of the distribution and control of the 

 disease. The raspberry and blackberry anthracnose appears much more 

 common than that of the grape. 



Viala, P. Loc. cit. p. 216. 



9Viala, P. and Pacottet, P. Culture et developpement de 1'Anthracnose. 

 Revue de Viticulture 22:117 and 145. 1904. 



Viaia, P. and Pacottet, P. Nouvelle Recherches sur 1'Anthracnose. Re- 

 vue de Viticulture, 24:1905; 25:1906. 



lOBurkholder, W. H. The perfect stage of the fungus of raspberry an- 

 thracnose. Abst. Phytopathology 4:407. 1914. 



UWoronichin, N. N. Myc. Centbl. 4:225-233. 1914. 



