﻿28 BULLETIISr 1397, U. S, DEPAETMENT OF AGRICULTURE 



2,500 teet to about 4,000 feet above sea level. A careful study made 

 in the El Paso Valley shows that there has been no noticeable 

 increase in the amount of infestation during the last four years. 

 These conditions greatly minimize the danger from the western 

 infestation. The experience of several years shows that it is per- 

 fectly feasible to eliminate practically all danger of spread to other 

 regions. There is a chance, however, that this spread may occur 

 despite all precautions, and it is undoubtedly wise to maintain the 

 restrictions with the utmost vigor. 



On the whole, the conclusion seems to be warranted that the work 

 done has resulted more succesfully than in the beginning was thought 

 possible, and fully justifies the efforts and expenditures which have 

 been made. This work must be continued, however, by preventing 

 any possible recurrence in the districts where infestation has been 

 found, by being ready to handle any undiscovered infestations in the 

 Cotton Belt proper, by minimizing as far as possible the danger of 

 the spread of infestation from the western areas, and by taking every 

 precaution against new infestations from Mexico. 



