16 



NATURAL CONTROL OF THE COTTON BOLL WEEVIL. 



Through the dispersion movements during the fall of 1904 weevils 

 spread over a large area in western Louisiana, as shown on the accom- 

 panying map (fig. 1). 



By a large number of very careful field examinations between 

 May 1 and August 1, 1905, Mr. Wilmon Newell, entomologist of the 

 Louisiana State crop pest commission, with the assistance of Messrs. 



R K A N S A 



L©!y3SDM3A 



PffO£/1BLY W/P/A/G F4LL OF /302 



F4LL./903—M/GFW7YOA/ OF> Aftr/F/C/JL SPFT^D 



/U/GUST, /904— Sl/ODtA/ M/GfijT/O/V. 



^ SfPF OCT MOV /SM-SIOIV M/GPMF/OA/. 



f/ISFFPH l/Af/r OF //VFFSZ4T/QA/ '. J(SZ.y 3/ /9Q5 



°^ 



o^ 



^EX/OO 



Fig. 1. 



-Map of Louisiana, showing dispersion movements of 1903 and 1904 and reduction of infested 

 area by winter conditions of 1904-1905. 



E. S. Hardy, J. B. Garrett, W. O. Martin, and C. W. Flynn, working 

 in cooperation with the boll weevil investigation of the Bureau of 

 Entomology, was able to determine that the weevils had been prac- 

 tically, if not completely, exterminated in that portion of the 1904- 

 infested area lying east 'of the heavy line shown in the map, running 

 from the southwestern corner of Caddo Parish, through about the 



