Smithsonian Report, 1945. — Perry 



PLATE 3 



1 Guayule Growing Wild in the Semidesert Plateau Country of North- 

 Central Mexico, and the big Bend Section of Texas. 



A number of rubber mills have operated in this territory for the past 40 years. 



2. Using an Oil Spray to kill Weeds in a California Guayule Field. 



Diesel oil is emulsified with water and applied at high pressure. The spray kills or injures the weeds, but 



does not damage the guayule. 



