Bui. 1 1 2, Bureau of Entomology, U. S. Dept. of Agriculture. 



Plate VII. 



Fig. 1. — Second crop of alfalfa, estimated at 2 tons per acre, secured from field treated with wire- 

 brush cultivator. Photographed August 2, 1911. (Original.) 



Fig. 2.— Fourth crop of alfalfa secured from field where brush cultivator was used. Photographed 



October 9, 1911. (Original.) 



Fig. 3.— Condition of field used as check (PI. V, fig. 3). The second and third crops on this field 

 made little growth and were much delayed, so what would correspond to the fourth crop was 

 caught by frost. Photographed October 12, 1911. (Original.) 



Field Experiments Against the Alfalfa Weevil. 



