BEAN A.NTHRACN0SE L57 



l>v this fungus, but fiis own observations 'I" not confirm this and he 

 thinks the disease observed was due to some other fungus. 



Edgerton (1910 M)) also sprayed spores of C. lindemuthianum on young 

 bush beans, alfalfa, and cotton plants protected by \><-\\ jars, but obtained 

 infection on the beans alone. Baumler MSSSj reports Gloeosporium 

 lindemuthianum as occurring on stems and leaves of Orobus vermis. It 

 seems that in this case the species of the pathogene was incorrcetly 

 determined. 



The writer, in the course of his infection studies with beans, has inocu- 

 lated seedlings of sweel pea (Lathyrus odoratus L.) and garden pea {Pisum 

 sativum L.), vines and young pods of cowpea (Vigna sinensis [L.] Endl.), 

 and young plants of mandrake {Podophyllum peltatum L.), with pores 

 of Colletotrichwm lindemuthianum. Excellent infection was obtained on 

 beans used as checks, but the other plants remained free from disease. 

 !n a secies of other inoculation experiments on seedling planl i, fair to 

 good infect ion resulted on the stems of certain individual black eyed 

 beans or cowpeas (Vigna sinensis [L.] Endl.), and slight to fair infection 

 on Uie epicotyl of the kulthi bean (Dolichoi bijlorus L.); but no infection 

 resulted on any part of the bonavist bean {Dolichos lablab L.), the guar 

 bean (Cyamopsis tetragonoloba Taub.), the asparagus bean {Dolichos 

 sesquipedalis L.)» the jack bean (Canavalia ensiformis [D.] DC), four 

 varieties of horse bean ( Viciafaba L.),and Hie garbanzo bean, or chickpea 

 (Cicer arietinum L.). There are evidently but few species outside the 

 genus Phaseolus which are susceptible in any degree to anthracnose, 

 and no plants except varieties of Phaseolus vulgaris are susceptible to 

 such an extent that the disease becomes epiphytotic in regions where 

 such plants are extensively grown. It, is not unlikely that several strains 

 of tlie pathogene exist, one capable of infecting Phaseolus muUiflorus or 

 some of its varieties in a severe manner, another able to attack Vigna 

 sinensis, and others attacking plants related to the bean, each being 

 eonf'me<l rather closely to the species, or even to certain varieties within 

 the species, to which they have adapted idem elves. 



Susceptibility of Phaseolus vulgaris to infection from other anthracnose fungi 



Frank (1883b: 518) was the first to inoculate 'lie bean with poo 

 of another anthracnose fungus in order to determine whether the 

 forms occurring on different hosts were really the tame ipecies He sowed 



