July 2 .1917 A New Disease of Wheat 53 



Plate 5 is of wheat from Fort Worth, Tex. (crop of 191 7). 



Plate 6, figure 2, and Plate 7, from Arkansas wheat (crop of 1917) show 

 black glumes, twisted awns, and bacterial ooze from the rachis and from 

 the stems. 



Based on v^^hat I have seen, two tentative pieces of advice may be 

 offered : 



(i) Use, this autumn, seed wheat derived only from fields known to 

 have been free from the disease. 



(2) Avoid the use of manure from animals fed on or bedded on diseased 

 straw. Such manure should be used only on fields not intended for 

 wheat or other grains. Animals pastured on diseased wheat stubble 

 should not have the range of fields designed for the next crop of wheat. 



It is hoped that by the middle of August of this year sufficient data 

 may be in hand to make a definite statement as to the cause of the dis- 

 ease, the localities where it occurs, the approximate losses due to it, its 

 method of distribution — that is, whether on the seed or not — and the 

 best means for holding it in check, if any can be found. ■ 



