p^4 



=.a^rH 



fMMm 



Fig. 28. Sweet Potato Diseases. 



a. and i. Chains of conidia of the soil stain fongos Monilochatzs infuscans, 

 h. to /. manner in. which the r-hgins cA conidia erf M. infuscans are breaking up 

 into individual spores, o. gerxninating <x>mdia of M. infuscans. r. part of a 

 cross section of a sweet potato root showing the relationship of M. infuscans 

 to the epidermis of the host, p. conidiophores of TrickckUrma Koningi, a, 

 young strands of myc^am of Pkyinatotrickum. omnivorutn. r. mycelial strands 

 of the Texas root rot fungus, Osonium omnivorum from dead cotton plant {q. 

 and r. after Du^gar), m.. sclerotia of Sclerotium balalicola. 



