U. S. DEPARTMENT OF AGRICULTURE. 



BUREAU OF PLANT INDUSTRY— BULLETIN NO. 220. 



B. T. ii .\h] jOW AY, Chief of JJureau. 



RELATION OF DROUGHT TO WEEVIL 

 RESISTANCE IN COTTON. 



BY 



O. F. COOK, 

 Bionomist in Charge of Crop Acclimatization and Adaptation Investigations. 



Issued August 7, 1911. 



washington: 

 giovernme:7t printing office. . 



1911. 



