274 BuivivETix 90 



COTTON ANTHRACNOSE 

 Cotton Anthracnose is a disease that has caused great loss in the 

 south, but Httle if any in Arizona. Importation of cotton seed should 

 be avoided, as this disease is carried on or within the seeds. No satis- 

 factory methods of controlling this disease are known. 



ROOT ROT 



Root rot of cotton is a disease and lives over in the ground from 

 year to year. The only practical known method of control on infected 

 soil is to grow for at least two years in succession some crop not af- 

 fected by root rot. Such crops are corn, the various varieties of 

 sorghum, and the small grains, such as wheat, barley, etc. Alfalfa and 

 certain other tap-rooted plants are subject to root rot and must not be 

 grown when attempting to rid the ground of this disease. Since cer- 

 tain weeds may be affected by root rot, deep plowing and clean culti- 

 vation are recommended as control measures. 



INSECT PESTS 



Due largely to the strict quarantine that has been maintained, cot- 

 ton boll weevil, pink boll worms, and many other troublesome insect 

 pests of cotton have been kept out of Arizona. It is urged that every 

 farmer within the State use his influence to help enforce this quaran- 

 tine. If insect troubles of any kind are encountered, notify at once 

 the Experiment Station at Tucson, or the State Entomologist's oface 

 at Phoenix. A complete discussion of cotton insect pests will be found 

 in Bulletin 87 of this Station, which may be had on application. 



COTTON IN ARIZONA AGRICULTURE 



At the present time (1919) cotton is the most important cash crop 

 in Arizona. It is unlikely that the present high price of cotton will be 

 maintained indefinitely and farmers should bear in mind that any system 

 of agriculture that is to be permanently successful must be well bal- 

 anced. Cotton should not be grown to such an extent that other crops 

 or livestock are reduced below a safe amount or number. It should 

 be the aim of every good farmer to maintain the soil at all times in 

 a high state of fertility and to this end an intelligently planned crop 

 rotation must be followed. 



SHORT-STAPLE COTTON 

 Short-staple cotton will mature in a shorter growing season than 



