NEMATODE GALLS IN MARKET WHEAT. 6 



in some Virginia wheat. Observations showed the exhibits to be 

 nematode galls resulting from plants infected with the nematode 

 disease of wheat. These findings were confirmed by the Bureau of 

 Plant Industry. 1 



Further inquiry throughout the State of Virginia revealed the 

 fact that this single occurrence was not an isolated one, but that 

 the disease was established in various sections of the State in such 

 magnitude as to affect seriously not only yields per acre but also 

 the market grades and milling quality of wheat containing such 

 material. At the present time these galls have been found in wheat 



Fig. 1. — Showing places in the State where the diseased kernels have been found 

 either in wheat or in screenings. 



or wheat screenings from merchants or millers in the vicinity of 

 Bridgewater, Crofton, Charlottesville, Culpeper, Dayton, Doves- 

 ville, Edinburg, Grottoes, Harriston, Harrisonburg, Leesburg, Lacey 

 Springs, Lexington, Linville, Lynwood, Lynchburg, Marshall, Mount 

 Solon, Mount Crawford, New Market, Purcellville, Port Republic, 

 Powhatan, Rural Retreat, Timberville, Union Mills, Weyers Cave, 

 and Woodstock, in the State of Virginia. 



Through the courtesy of the Food Administration Grain Corpora- 

 tion approximately 3,500 samples of wheat have been analyzed from 

 all the important wheat-growing sections in the United States. 

 The results of these observations are given in Table 1. 



1 In this connection acknowledgment is made of the work of Mr. L. P. Byars of the 

 Bureau of Plant Industry. 



