PLATE 30 
A. —The normal cortex and inner tissues of a potato tuber. 
B. —An enlarged lenticel, showing a very early stage of infection. 
C. —Fungal filaments and broken down cells in an infected lenticel slightly over 1 
mm. in diameter. 
D. —A host cell highly magnified showing the interior filled with fungal hyphae. 
E. —The granular contents of one of the pits as it appears under the microscope. 
F. —Rhizoctonia hyphae from a pure culture isolated from the interior part of a dry 
core. 
