PLATE 65 
Plastnodiophora brassicae: 
A. —A section through a cabbage stem 13 days after inoculation. X 12. 
B. —A section 15 days after inoculation. Note that the disease has spread deeper 
into the tissues. In figure A the plasmodia are just beginning to infect the cambium 
in figure B they may be seen in the tissues beneath the cambium. X 12. 
