8 



THE ALFALFA WEEVIL. 



The Utah Agricultural Experiment Station during the season of 

 1910 carried out a great number of field experiments with different 

 methods of controlling the weevil, but none of these has so far given 

 entirely satisfactory results. Besides, measures that are practicable 

 in one locality may be impracticable in another. 



It would seem, therefore, that the efforts of the Bureau of Ento- 

 mology should be. first, to endeavor to restrict the pest as effectually 



35 



'er 



68>959 



334- 



^3. 



6/2 



.'60, 



029^ 



•10' 



*/r 



13,029 



74, 



688 



658 



|...,v. 115,142 ... \ 2,298 



.56. 



725 



•n*' 



.!f:<'^ 



m: 



ife«» 



^55,237 





298 



896 



62.585 



55,4-67 



18,999 



m 



Fig. 10. — Map showing area in Utah infested by the alfalfa weevil with reference to 

 alfalfa culture in the western half of the United States in the year 1890. Note: The 

 numerals indicate the acreage devoted to the culture of alfalfa in each State. (From 

 Westgate, Farmers" Bui. .339.) 



and as long as possible to its present area of infestation, and, second, 

 to use every means in its power to control it, in the meantime, within 

 this area. In the first instance, the bureau experts will have the 

 cooperation of the Utah Agricultural Experiment Station, as during 

 the past year (1910), but in the very important part of this work, 

 namely, the introduction and colonization of natural enemies, both 



