Title: Studies of fungous parasites belonging to the genus Glomerella
Abstract: Pathologist in Charge of the Office of Fruit-Disease Investigations.This bulletin gives the results of studies of a group of fungous parasites of great economic importance.Few fruits are free from the attacks of this fungus.The life histories and relationships as well as the physiological and pathological characteristics of the organism from 36 different host plants are herein recorded, in many cases for the first time.It has been found that what had heretofore been regarded as distinct species of fungi restricted to certain host plants are in reality merely races or strains of one species which is capable of infecting various hosts.These facts have a very direct and important bearing upon the practical problems of the prevention and control of the wide- spread and serious diseases caused by these parasites and also upon the broader general biological questions connected with the evolution of plant parasites.