/ 



331 



as in previous trap studies, but significant numbers of boll weevils, primarily 

 females, were captured in mid-season, thus indicating a true sex pheromone at 

 this time of year. Previous trap studies failed to obtain this mid-season 

 response. In-field traps provide a new and promising approach to survey and 

 monitoring efforts, to evaluate an elimination program, and to the actual 

 management and suppression of the boll weevil. 



640. , and Hardee, D. D. 197A. Seasonal determination of sex ratios and 

 condition of diapause of boll weevils in traps and in the field. Environ. 

 Entomol. 3: 386-388. 



Boll weevils, Anthonomus grandis Boheman, captured in traps were not always 

 representative of field populations with respect to sex ratio and status of 

 diapause. From June to mid-winter, the ratios of captured females to males 

 are higher than they are in field populations. In the fall, the percentage 

 of boll weevils in the field that are in diapause is higher than the percen- 

 tage among those captured in traps. 



641. , and Hardee, D. D. 1976. Boll weevils: attractancy to pheromonelin 

 relation to distance , wind direction. J. Ga. Entomol. Soc. 11: 113-117. 



The long range movement of Anthonomus grandis Boheman to primarily with the 

 wind. They probably are not able to detect an attractant further than 500- 

 600 ft and move at random with the wind until they come within this distance 

 of the attractant source. 



642. ; Hardee, D. D.; Cross, W. H.; Huddleston, P. M.; and Mitchell, H. C. 

 1972. Influence of rainfall, sex ratio, and physiological condition of 

 boll weevils on their response to pheromone traps. Environ. Entomol. 



1: 438-440. 

 Tests with traps baited with male Anthonomus grandis Boheman Indicated that 

 early-spring temperature Influenced emergence of overwintered weevils but 



