Persistence of infestation through the season is favored by rank cotton and 

 indirectly by fertility and high water-holding capacity of the soil. 



1959 - Fye, R. E„ W. W. McMillian, and A. R. Hopkins. Time between puncture by the 

 boll weevil and fall of the punctured cotton square. J. Econ. Ent 52(1 ):134- 136, 

 Study of the time a cotton square remains on a plant after it has been punc- 

 tured by a boll weevil showed no difference in this respect between Empire WR, 

 Dixie King, and Coker 100 W varieites. The number of punctures and the type 

 of puncture, whether feeding or oviposition, had little or no effect. Squares were 

 retained an average of 11 to 13 days. Twenty percent of the squares remained on 

 the plant and produced usable lint. Plants treated with gibberellic acid retained 

 more punctured squares than untreated plants. 



1959 - Fye, R. E., W. W. McMillian, A. R. Hopkins, and R. L. Walker. Longevity of 



overwintered and first generation boll weevils at Florence, S. C. J. Econ. Ent. 

 52(3):453-454. 



The average life of overwintered boll weevils after emergence from hiberna- 

 tion was 20 to 22 days, and ranged from 1 to 141 days. Fat analyses showed that 

 weevils containing most crude lipids lived the longest. First-generation weevils 

 lived 9 to 115 days, with an average of 41.5 days. There was no correlation of 

 total crude lipids with longevity in the first generation. 



1960 - Beckham, C. M , and L. W. Morgan. On the flight distance of the boll weevil. J. 



Econ. Ent. 53(4):681-682. 



For a planting of cotton to be isolated from the boll weevil, it must be re- 

 moved from other cotton by a distance greater than 25.5 miles. Under similar 

 conditions in this area of Georgia, population studies on the boll weevil may be 

 conducted until about August 15 without contamination by migratory weevils. 



1960 - Miner, Floyd D. Cotton insects in Nicaragua. J. Econ. Ent. 53(2):291-296. 

 The cotton- insect problem in Nicaragua is in many respects similar to 

 that in the United States. The most serious pests are the boll weevil and 

 Sacadodes pyralis Dyar, a Phalaenid which bores into bolls. The boll weevil 

 passes the dry season between crops in old cotton fields. Reproduction apparently 

 ceases during this time. Early infestations in young cotton were heaviest in fields 

 planted before the usual date. Peak infestations occurred when the crop was ap- 

 proaching maturity. The life cycle is similar to that in the United States. 

 Sacadodes also was generally a late season pest, and was particularly serious in 

 late planted fields. Infestations of both insects were reduced by means of in- 

 secticides, but increases in yield were small. 



ECOLOGICAL STUDIES 



1902 - Hudson, E H. The Mexican boll weevil ( Anthonomus grandis ). Tex. Farm & 

 Ranch 21:13. Feb. 1. 



An account of some experiments regarding the effect of freezing and the heat 

 of the sun on the boll weevil. 



1912 - Hunter, W. D., and W. D. Pierce. The Mexican cotton boll weevil. U. S. D. A. 

 Bur. Ent. B. 114:23-29. 



Contains references to the relation of arid and semi-arid conditions on 

 Anthonomus grandis. 



134 



