PLATE 76 
Plasmodiophora brassicae: 
A—A longitudinal section through the woody part of a cabbage stem that has been 
split open by medullary infection. X 7 °- , .. 
B.—A cross section of a young cabbage root. The ragged outer tissues are the 
primary cortex. The dark, more or less spherical bodies in the cells of these tissues 
are the plasmodia of Olpidium brassicae . X 80. 
