PLATE 4 
A—Wheat infested with the nematode disease. When this wheat was sown, nematode 
galls were sown with the seed. Note the severe stunting of the plants and the 
wrinkling of the leaves. j • i 
B.—Barley growing in a row adjacent to the badly diseased wheat and similarly 
inoculated but apparently not affected by the nematodes. 
