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324. ; Cross, W. H.; Mitchell, E. B.; Huddleston, P. M.; Mitchell, H. C; 

 Merkl, M. E.; and Davich, T. B. 1969. Biological factors influencing 

 responses of the female boll weevil to the male sex pheromone in 

 field and large-cage tests. J. Econ. Entomol, 62: 161-165. 



Results of studies of female Anthonomus grandis Boheman made to determine 

 the influence of biological factors on its response to male sex pheromone 

 indicated that: (1) laboratory-reared males were as attractive and females 

 were as responsive as native weevils if they had access to cotton squares 

 (flower buds) as food; (2) increased attraction of isolated males over 

 grouped males was substantiated; (3) males in close proximity to females 

 were no more attractive to females than Isolated males; (A) the lack of 

 response of recently mated females emphasized the need to capture females 

 in traps before they mate with free, competing males; (5) sterilization of 

 males with apholate or irradiation did not significantly decrease their 

 attractiveness compared with untreated males; (6) females responded to 

 males as many as 3 times and from distances of as much at 82 m; (7) the 

 high percentage of females captured in traps baited with males in the ab- 

 sence of competing males, and the low percentage captured with males in 

 traps in an infested plot containing large numbers of competing males 

 suggest that the sex pheromone might have a major role in suppressing 

 weevil papulations in areas where populations are extremely low, for 

 example, in the spring after an effective fall diapause-control program 

 the substantially reduced the number of overwintering boll weevils. 



325. , and Davich, T. B. 1966. A feeding deterrent for the boll weevil, 

 Anthonomus grandis , from tung meal. J. Econ. Entomol. 59: 1267-1270. 



A substance that deters feeding of the boll weevil, Anthonomus grandis Boheman, 

 was found in the filtrate of a water extract of tung meal, a byproduct of the 

 process of extracting oil from the seeds (nuts) of the tung tree. Aleurites 



