-Naturally infected geranium cutting; P. debaryanum was isolated 
-Cutting naturally infected with P. debaryanum var. Pelargonii, Washington greenhouses 
-Artificial inoculations, fifth day; Ca, P. debaryanum; Cb, P. splendens; Cc, P. debaryam 
var. Pelargonii 
-Leaf from Cb, showing the shriveling and discoloration of the base of the petiole 
