

1917 - Anonymous. An illustration of the importance of quarantine against injurious 

 insects. J. Econ. Ent. 10(2):298. 



The cotton belt of Brazil, after thorough examination in 1914, was pro- 

 nounced to be free of the boll weevil. The pink bollworm was found to be 

 general throughout the cotton growing area in 1916. 



1917 - Hunter, W. D. The boll weevil problem, with special reference to means of 



reducing damage. U. S. D. A. Farmers' B. 848, 40 p. 



Contains a general account of the boll weevil problem, the history of the 

 insect in the United States, the damage it has done in different regions and the 

 reason for local variations in damage, the indications for the future, habits of 

 the weevil relative to control procedures and means of reducing injury. 



1918 - Anonymous. El algodonero in Colombia. Revista Agricola 4(5, 8 & 9):263-270, 



503-512, & 551-567, 6 fig. May, Aug. & Sept. Bogota. 



In the course of this paper on cotton cultivation in Colombia, some account 

 is given of insect pests of this plant, including Anthonomus grandis, which has not 

 yet appeared in Colombia. 



1918 - Ballou, H. A. Spread of the Mexican cotton boll weevil in the U. S. Agr. News 

 17(428):298. Barbados. 



Discussing an account published by the USDA on the present situation with 

 regard to the cotton boll weevil and its spread during recent years, the author 

 remarks that it is of great interest to cotton growers in the West Indies to note 

 that for a period of 2 5 years the Mexican boll weevil has spread steadily through 

 the cotton belt of the southern States at an average rate of more than 15,000 

 square miles each year, that the Sea Island cotton districts of Georgia and 

 Florida are invaded, and that the pest has reached South Carolina and at the end of 

 1917 threatened the Sea Island cotton district of that State. 



The output of Sea Island cotton from those States is bound to suffer a reduc- 

 tion and it is pointed out that in view of the high cost of production, growers of 

 this class of cotton are likely to turn their attention to the substitution of a more 

 profitable crop. In that case the West Indian cotton growers will be in an in- 

 creasingly strong position, and it becomes more than ever a matter of national 

 importance to protect the cotton industry throughout the Islands. 



It is pointed out that A. grandis has within a period of 25 years spread over 

 an area of nearly 500,000 square miles and in a few years more will infest the 

 whole of the cotton belt (some 600,000 square miles). This steady spread has 

 been in the face of strenuous exertions to check its increase. 



1918 - Isley, D. Entomology. Ark. Agr. Exp. Sta. B. 158:45-49. Dec. Fayetteville. 



The cotton boll weevil was present in great numbers. 



1919 - Sherman, F. Report of the Division of Entomology. N, C. Agr. Exp. Sta. 



42d Ann. Rpt., 1918-19:54-58. Raleigh. 



"The spread of the cotton boll weevil (A. grandis) into North Carolina is 

 recorded." 



1920 - Hurd, W. E. Influence of the wind on the movements of insects. Mo. Weather 



Rev. 48(2):94-98. Wash. 



"The importance of wind to migratory swarms of locusts is well known. Two 

 of the most sharply defined extensions of the Mexican cotton boll weevil in Texas 

 occurred in 1915 and 1916, and were largely due to the sweeping winds experi- 

 enced in those years." 



1921 - Barre, H. W. Insect Pests. S. C. Exp. Sta. 34th Ann. Rpt., year ended June 30, 



1921:29-36, 2 fig. Dec. Clemson. 



"The cotton-boll weevil. . .now occurs throughout the State and if cotton is to 

 continue to be grown, it must be done in accordance with the improved practices 

 developed by the more southern States to meet the same conditions." 



168 



