1926 - Cassidy, T. P. The Arizona cotton boll weevil problem, J. Econ. Ent. 19(5):772- 

 777. 



It was thought that this weevil (A. grandis thurberiae ) may be potentially a 

 more serious menace to cotton in the drier regions than either the pink bollworm 

 or the typical A. grandis is in the regions in which they occur. The Arizona 

 weevil prefers bolls for oviposition, so that measures to make a crop mature in 

 advance of the weevil, such as are employed in the South against the typical form, 

 would be of no advantage. The weevil shows an enormous degree of resistance to 

 extreme conditions. It is able to go into a state of at least partially suspended 

 animation whenever conditions become too hot, too cold, or too dry. Hibernation 

 studies showed that about 70% of the weevils survived under conditions about as 

 severe as are ever expected in an area southwest of Tucson, whereas only 2% to 

 5% of A. grandis survive under normal conditions. 



This variety is ideally adapted for transportation. 



1926 - Hinds, W. E. Boll weevil control results for 1925. J. Econ. Ent. 19(4):599-600. 

 The uniform conditions of excessive heat and drought in 1925 in the cotton 

 growing districts of the United States had a remarkable effect on the abundance 

 of the cotton boll weevil. At the beginning of the season the weevils were fairly 

 abundant, but, during the time when they are usually most harmful, they were 

 practically eliminated by weather conditions. In the autumn the numbers in- 

 creased in some localities, and sufficient weevils hibernated to form a distinct 

 menace in 1926, if weather conditions were normal. Under conditions of 1925, 

 dusting was almost unnecessary. The cotton aphis was more abundant on dusted 

 than on untreated fields. 



1928 - Hinds, W. E. Important cotton insects of central Peru. J. Econ. Ent. 

 21(4):545-551. 



A brief investigation of the more important cotton pests in a district about 

 100 miles south of Lima in central Peru afforded no evidence of the existence 

 there of either Anthonomus grandis Boh. or Platyedra gossypiella Saund. 



Anthonomus vestitus Boh. was found from sea level to an altitude of over 

 2,000 feet. The presence of the adults was betrayed by the flaring and falling 

 of the squares, which drop more quickly after oviposition than those attacked by 

 A. grandis. 



1928 - Morstatt, H. Actes du Conseil International Scientifique Agricale. Premiere 



Session (November 7-12, 1927). Internat. Inst. Agr. Roy. v. II, 754 p. 

 Rome. 



The report in v. 2, p. 542-552, by H. Morstatt contains a review of the 

 biology, distribution, and control of the cotton boll weevil. 



1929 - Hinds, W. E. The development of a control program for the Mexican cotton boll 



weevil and some of its results. 4th Internat. Cong. Ent., Ithaca, N. Y. 1928(2): 

 175-180. 



The history of the cotton boll weevil as a pest of cotton and the development 

 of control measures in the United States. Dusting against this pest has been in- 

 creasingly practiced in the Southern States during the past 10 years, and poisoning 

 is now considered as essential as the use of improved seed or commercial 

 fertilizers. Where the "average" yield of cotton was 1/3 bale per acre, it 

 cost more than 20 cents to produce, whereas in districts where the full program 

 of weevil control and the best cultural measures were applied, the average yield 

 for the past 3 years was practically 2 bales per acre and the total cost was 5 to 

 9 cents per lb. It is now possible to produce cotton at a greater profit than before 

 the weevil occurred. 



1929 - King, W. V. The cotton flea hopper ( Psallus seriatus ). 4th Internat. Cong. Ent., 

 Ithaca, N. Y. 1928, p. 452-454. 



Under ordinary conditions of damage by the boll weevil, the planter often 

 depends on the early part of the crop before the weevils become numerous, and 



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