4 BULLETIN *734, U. S. DEPARTMENT OF AGRICULTURE. 



Table I. — Results of the analyses of commercial wheat samples for the presence 



of nematode galls. 



State where grown. 



Number 



of 

 samples. 



Arkansas.. 

 California . 

 Delaware.. 

 Georgia . . . 

 Kentucky. 



Illinois 



Indiana . . . 



Iowa 



Maryland. 

 Michigan.. 

 Minnesota. 

 Mississippi 

 Missouri... 

 Montana . . 



1 



266 



8 



3 



1 



172 



91 



3 



201 



85 



163 



1 



223 



163 



Per com 

 of sam- 

 ples 

 showing 

 gall. 



Trace. 

 

 

 

 

 

 

 

 

 

 

 

 



State where grown. 



Nebraska 



New Jersey... 



New York 



Ohio 



Oklahoma 



Oregon 



Pennsylvania . 

 North Dakota. 

 South Dakota. 



Virginia 



West Virginia. 



Wisconsin 



Not known . . . 



Number 



of 

 samples. 



23 

 1 



44 



204 



4 



127 



193 



83 



108 



52 



1 



1,000 



Per cent 

 of sam- 

 ples 

 showing 

 gall. 



Xo samples were found outside of the States of California and 

 Virginia having wheat infected with these nematode galls, and it 

 would seem at the present writing that the disease is confined mostly 



FlG. 2.- — A , Nematode galls; B, wheat containing an admixture of galls 

 for comparison with A. Lower, galls and wheat enlarged 3X. 



C, wheat 



to the State of Virginia. Eleven per cent of the samples of the 

 Food Administration from Virginia showed the galls to be present 

 to a greater or less degree. One of the California samples had galls 

 present in the dockage determination separation. 



DESCRIPTION OF THE GALLS AND DISEASED PLANTS. 



The'galls which have been photographed and are shown in figure 2 

 in comparison «with sound wheat are irregular in shape, shriveled, 



