254 Journal of the Department of Agriculture. 



General Characters and Symptoms. 



The disease first becomes visible to the naked eye as black streaks 

 on the leaves, parallel with the veins, and extending along- the length 

 of the leaf blade. (See Fig. 2, which is an enlarged drawino- of a 

 portion of a leaf.) ' '^ 



The whole plant is stunted, and the leaves frequently become 

 much twisted and distorted. The whole stool may be diseased, in 



Fig 3. 



which case it is killed outright, or else only some of the shoots of the 

 stool, the rest forming normal ears, though undersized ones. The 

 general appearance of a typically diseased wheat plant reminds one 

 ot a comnion cattle tulp plant, and it is from this similarity in appear- 

 ance which has given rise to the South African name of " fulp brand " 

 i ^^^^^lisease (Fig. 3). Fig. 4 is a photogi-aph taken in a wheat-field 

 where the disease is prevalent, and shows in the foreground a normal 

 stool on the right, and a diseased one on the left ; the latter is less than 



