PlyATB 47 
A. —Barley leafblight, X natural infection, showing exudate gathered in three 
grayish glistening drops on the surface of the water-soaked blighting area. 
B. —Blighting barley leaf, X i %. Early stage of mid leaf stripe invasion, this 
stripe showing the water-soaked translucent appearance; the grayish exudate so 
abundant as to have formed a glistening droplet just above the ligule. 
C. —Blighting barley leaves natural infection, X 2. a, A small insect (midge) 
entrapped in the exudate. b t The dry thin grayish exudate film (X) at the lower 
part of the blighted area is partly detached and turned back. The exudate film is so 
nearly transparent that the leaf veins are slightly visible through it. 
D. —Barley leaf, X 4, showing general blighting, the surface studded with numer¬ 
ous exudate droplets hardened into yellowish resinous granules, readily dislodged. 
These granules tend to appear in longitudinal rows upon the stripes. 
