1922 - Anonymous. Farming under boll weevil conditions. N. C. Agr. Ext. Serv. C. 124, 

 22 p. Feb. 



Defines counties in which damaging and light infestations are to be expected 

 and cultural methods to be employed to minimize damage. Also includes an article 

 entitled "Poisoning Cotton-Boll Weevils" by B. R. Coad, Bureau of Entomology 

 U. S. D. A. 



1922 - Smith, G. D. A preliminary report upon an improved method of controlling the 

 boll weevil. Fla. Agr. Expt. Sta. B. 165, 72 p. Oct. 



Reviews past efforts to control the boll weevil. A proposed method consists 

 in clearing cotton fields, early in June, of all adult weevils and at the same time 

 destroying their eggs and larva, leaving plants to grow without interference for a 

 succeeding 8 weeks. Shows that through use of hand removal of squares and use 

 of calcium arsenate at a cost of $1.01 to $1.72 per acre, increase yield values of 

 $9.69 to $33.63 were obtained. 



1922 - Smith, G. D. Preliminary report upon an improved method of controlling the boll 

 weevil. Fla. State Plant Bd. 2.B. 7(l):l-64, 13 fig. Oct. Gainesville. 



A study of boll weevil conditions in Florida suggested that the first genera- 

 tion of weevils could be destroyed by stripping from the cotton plants the first 

 squares of the season, and with them the eggs deposited by the weevils after 

 hibernation. Care must be taken that all weevils are out of their winter quarters 

 before this is done. In normal seasons the squares should be removed between 

 June 5 and 8, and this should be followed by a thorough application of calcium 

 arsenate or lead arsenate at the rate of 5 to 7 lbs. per acre, using a suitable 

 dusting machine. The weevils, deprived of squares in which to hide and feed, will 

 attack the terminal buds for food, and these buds can easily be filled with poison 

 by means of a dust gun. This method has been found to destroy practically every 

 weevil that had escaped capture in the stripping operation. A table recording 

 emergencies of the weevils at various places shows that 99% are out of hiberna- 

 tion and in the cotton fields by June 5. In order to get the plants into the right 

 fruiting stage for treatment, nonfertilized cotton should be planted about the last 

 week in March. If fertilizer is needed, planting should be done one week later. If 

 the season is unusually late, the treatment should be delayed for a few days, until 

 enough squares have appeared on the plants to act as traps for the adult weevils. 



The effect of stripping the squares on the yield of cotton is discussed, and 

 the life history of the weevils under Florida conditions, with a view to satis- 

 factory application of the remedies, is dealt with. The second generation of weevils 

 matures about August 5, at the earliest, and by this time the Florida crop of 

 short staple is sufficiently matured to escape practically all damage by the 

 weevils. Many field tests with these methods are recorded in detail, and the best 

 method of removing the squares and of applying the poisons are explained. 



1922 - Hunter, W. D., and B. R. Coad. The boll weevil problem. U. S. D. A. Farmers' 



B. 1262, 31 p., 5 fig. Feb. 



A general account of the boll weevil in the United States is given. The 

 remedial measures suggested are based largely on cultural methods. Where 

 poisoning is required, calcium arsenate should be used in the manner that has 

 been shown to give good results. 



1923 - Cook, O. F. Boll weevil cotton in Texas. U. S. D. A. Dept. B. 1153, 18 p., 4 pi., 



May 12. Wash. 



Boll weevil cotton is the expression used to describe the effects of injury by 

 the boll weevil in cotton plants, which are forced into rank growth and show an 

 abnormal luxuriance that changes the form and appearance of the plants. As the 

 insects during periods of dry weather are dependent upon the protection afforded 

 by this thick growth, the advantage of cultural methods that will keep the lanes 

 open between the rows is obvious. Wider separation of the rows, combined with 

 closer spacing of plants in the rows, is a practical method of culture that is ad- 

 vantageous in dry seasons as well as under conditions of boll weevil cotton. The 



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