332 



that rainfall had more influence as temperatures increased. Since higher 

 percentages of males than females vere captured early in the spring and the 

 reverse became true later, the pheromohe may serve initially as an aggregating 

 factor and then subsequently as a true sex attractant. Most weevils emerged 

 in the spring with little fat reserve, but the variation in the amount of 

 fat reserve among individuals may account for the emergence of boll weevils 

 over such an extended period. 



643. ; Hardee, D. D.; and Wilson, N. M. 1975. Male boll weevils: studies 

 relating to attractancy. J. Econ. iintomol. 68: 150-152. 



The attractiveness of male Anthonomus grand is Boheman was closely related to 

 the passage of fecal material. The frass was more attractive than the male, 

 and the rate of attractancy of a starved weevil placed on food increased at 

 approximately the same rate as the increase in food passage. 



644. ; Haynes, J. W. ; Huddleston, P. M. ; and Hardee, D. D. 1975. Feasibility 

 of sterilizing emerging overwintered boll weevils with bait stations. 



J. Econ. Entomol. 68: 610-612. 

 Overwintered Anthonomus grandis Boheman can be sterilized and egg laying can 

 be greatly reduced in the laboratory by feeding them a diet containing busulfan 

 (1,4-butanedJLDl dimethanesulfonate) . A feeding table designed to attract 

 weevils as they emerged from hibernation quarters attracted a small percen- 

 tage of the total overwintered weevils that were in the field on July 1. 



645. ; Hopkins, A. R. ; Walker, J. T.; and James, W. 1966. Winter mortality 

 of boll weevils in cotton bolls in South Carolina. J. Econ. Entomol. 59: 

 1027-1028. 



Boll weevils lived longer in bolls held in the insectary than in any of the 

 Other treatments. However, none of the estimated 29,754 boll weevils inside the 

 bolls in the insectary and in the hibernation cages survived the winter. A total 



