PLATE i 
A. —Healthy udo plant used as control, of the same age as those shown in B and C 
B, C.—Udo plants 5 days after being inoculated with the Sclerotinia from decayed 
udo roots. The roots, as well as the petioles, have decayed. 
D.—Root of mature plant infected with Sclerotinia, lowing the sclerotia present 
on its exterior, near the surface of the soil. 
