Dispersion of the Boll Weevil in 1922. 5 



follows the Virginia-North Carolina boundary until it passes into Virginia just 

 south of Soudan, Va. It again returns to the North Carolina State line just 

 southeast of Hitchcock Mills, Va., and continues eastward along this line, again 

 entering North Carolina along the border line between Camden and Currituck 

 Counties, continuing southeastward along this line to Albemarle Sound. 



In Virginia the line enters Mecklenburg County just south of Soudan, and 

 goes northeastward to LaCrosse ; then turns southeastward through the south- 

 ern portion of Brunswick County, passing just north of Valentines, and con- 

 tinues through the southwestern part of Greensville County, reaching the State 

 line at a point southeast of Hitchcock Mills. 



In Florida the line remains the same as for several years and has been 

 described as follows : 



" The line passes Ozona in Pinellas County, Tampa, Seffner, and Plant City 

 in Hillsborough County, Fort Meade in Polk County, Kissimmee in Osceola 

 County, and Indian River City in Brevard County." 



The situation in the Western States remains practically the same as was 

 reported for the year 1921. The weevils have not appeared in the various 

 irrigated plantings, and the control measures involving a noncotton zone in 

 Arizona for the prevention of the Thurberia weevil have been continued. 



Table 1 has been prepared to show the movement of the boll w^eevil in 1922 

 by States, expressed in square miles, and eliminating the arid western areas. 

 From this it will be noted that 22,386 square miles of new territory were in- 

 vaded in 1922, the greatest gain for a single State being North Carolina with 

 16,363 square miles. The loss in Texas and Oklahoma amounted to 8,944 

 square miles, thus leaving a net gain of 13,442 square miles for the Cotton 

 Belt. 



Table 2 has been prepared to show the proportion of the cotton crop of each 

 State produced in the area not infested by the weevil at the end of 1922. From 

 this it is seen that only 4.01 per cent of the cotton crop is produced outside of 

 the weevil-infested territory. This is, of course, largely in Texas and Okla- 

 homa. 



We are indebted to the various State entomologists and their assistants for 

 help in determining the line in the different States ; in fact, the work in South 

 Carolina and North Carolina was done entirely by representatives of the State 

 entomologists of those States. 



Table 1. — Total area-, outside of irrigated western fields, in square miles, 

 infested hy the boll ireevil in 1922. 



state. 



I Year 

 I first ia- 

 I fested. 



Area in- 

 fested in 

 1921. 



Gain in 

 1922. 



Loss in 

 1922. 



Area in- 

 fested in 

 1922. 



Texas : 1892 



Louisiana I 1903 



Oklahoma 1906 



Arkansas , 1906 



Mississippi I 1907 



Alabama 1910 



Florida '. 1911 



Tennessee I 1914 



Georgia i 1915 



Pouth Carolina I 1917 



North Carolina i 1919 



Missouri i 1921 



Kentucky j 1921 



Virginia 1922 



Total j 



I 



Sq. miles. 



192, 385 



40,800 



50.681 



52, 173 



46,340 



51,300 



35,000 



17, 498 



58, 633 



30, 495 



21.920 



3,188 



358 







600,771 



Sq. miles. 

 

 

 

 

 

 

 

 4,725 

 

 

 16, 363 



906 

 



392 



Sq. miles. 

 5,850 

 

 3,094 

 

 

 

 

 

 

 

 

 

 

 



22,386 



Sq. miles. 



186, 535 



40,800 



47, 587 



52, 173 



46,340 



51,300 



35,000 



22,223 



58, 633 



30, 495 



38,283 



4,094 



358 



392 



614.213 



