Bui. 1 12, Bureau of Entomology, U. S. Dept. of Agriculture. 



Plate VI. 



Fig. 1. — "Wire-brush cultivator in operation on alfalfa field after first crop was removed. The brushes 

 crush the larvae and pupae on the ground at this time. Photographed June 7, 1911. (Original.) 



Fig. 2. — Second crop of alfalfa grooving nicely as a result of treatment given. (See fig. 1, above.) 

 Larvae and pupae were killed, so that second crop suffered only slight injury. (Original.) 



Fig. 3.— Condition of untreated fields about June. Photographed June 27, 1911. (Original.) 

 Field Experiments Against the Alfalfa Weevil. 



