a 



FIG. 28. SWEET POTATO DISEASES. 



a. and i. Chains of conidia of the soil stain fungus Monilochceles infuscans, 

 b. to I. manner in which the chains of conidia of M. infuscans are breaking up 

 into individual spores, o. germinating conidia of M. infuscans, n. 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 Trichoderma Koningi, a, 

 young strands of mycelium of Phymatotrichum omnivorum, r. mycelial strands 

 of the Texas root rot fungus, Ozonium omnivorum from dead cotton plant (q. 

 and r. after Duggar), m. sclerotia of Sderotium bataticola. 



