24 BULLETIN 723, U. S. DEPAKTMEISTT OF AGEtCULTURE. 



of kerosene. In this work 1,624 acres of land in the vicinity of 

 Hearne were cleaned, and 7,lT0 acres in southeastern Texas. The 

 work was not confined to fields in which infestation was actually 

 found, but included fields at a considerable distance beyond the 

 outermost points found infested. It involved the employment of an 

 average of about 500 laborers for the months of November, Decem- 

 ber, January, and February, and a f)ortion of March. In many 

 cases the laborers were assembled in camps and housed and pro- 

 visioned by the department. In other cases, where the work was in 

 the vicinity of towns, it was possible to employ local labor. The 

 safeguarding of cotton products produced in the infested areas in 

 1917 consisted of the milling of the seed under supervision at cer- 

 tain mills selected because their construction would enable the work 

 to be done with practically no danger of disseminating the pest. 

 The baled cotton, so far as possible, was caused to be exported or 

 shipped directly to northern mills. 



COTTON-FREE ZONES. 



In 1917 the Legislature of Texas passed an act intended to give 

 authority to prevent the establishment of the pink bollworm in the 

 State. Under this act authority was granted to quarantine the dis- 

 tricts in which the insect might be found, and to establisli zones in 

 which the planting of cotton might be prohibited. Under this 

 authority on January 21, 1918, the governor of Texas quarantined 

 the Hearne district as well as the territory found infested in south- 

 eastern Texas. In the case of Hearne the quarantined area included 

 a territory within a radius of 3 miles from the mill. In the case of 

 southeastern Texas the quarantined area included a safety zone on 

 the outermost points infested approximately 10 miles in width. 



On February 25, 1918, following the recommendation of Hon. Fred 

 W. Davis, commissioner of agriculture, the governor of Texas issued 

 a proclamation prohibiting the planting of cotton in the quarantined 

 areas. 



The finding of infestation by the pink bollworm in Mexico not 

 far from Del Rio in the spring of 1918 made it necessary to place 

 in operation another section of the Texas pink bollworm act. As a 

 consequence a third noncotton zone was provided to include McKin- 

 ney, Maverick, and Valverde Counties. 



SPECIAL REGULATION AT MEXICAN BORDER. 



The risk of direct entry of the pink bollworm from Mexico by 

 flight or by accidental carriage necessitated the provision in the 

 regulations governing the entry from Mexico of cottonseed cake, 

 meal, or other cottonseed products, including oil, that permits for 

 such entry should be issued only for the products named produced in 



