MELANCONIALES 



S93 



Diseases of many kinds of crop plants of tlie type called an- 

 thracnoses are produced by species of Gloeosporium and Colleto- 

 trichiim. When these funm involve woodv stems, the acervuli 

 produced correspond to those characteristic of Myxosporium. 



Fig. 151. Microstrovm jiiglmidis. A. Portion of pustule showing clavate 



conidiophore, conidia borne on sterigmata, nuclei remaining in conidio- 



phore, and immature multinucleate conidiophores. B. Vertical section of 



pustule of Microstrovia jitglandis, occurring on hickory. 



Duke (1928) regards \^ermicularia and Colletotrichum as of the 

 same generic type. Melanconium, represented by M. jiiligemnn, 

 which causes "bird's-eye rot" of grape berries, has dark conidia. 

 Certain species of vetch, notably Vicia satha, are widely at- 

 tacked by a fungus first described as Protocoronospora mgri- 

 cans, which was placed near Corticium. It seems instead to be 

 related to the anthracnose-producing fungi [Wolf (1920)], but 

 attendant problems of nomenclature have never been satisfac- 



