PLATE 
Effect of Phyiophthora parasitica var. rhei, on 
case being the region penetrated by the hypha 
A. —Parsnip. 
B. —Sweet potato. 
C. —Carrot. 
D. —Tomato. 
E. —Stayman Winesap apple. 
F. —Turnip. 
G. —Potato. 
12 
different plants, the darker area in each 
le after three days' incubation. 
