286 



season, Leggett traps were significantly more efficient than Story traps. 



5A4. ; Uitz, J. A.; Hartstack, A. W., Jr.; and Holllngswortli, J. P., Jr. 



1978. Response of the male boll weevil to grandlure. Southwest. Entomol. 



3: 124-129. 

 When laboratory-reared male boll weevils, Anthonomws grandis Boheman (Coleoptera: 

 Curculionldae) , were released around a grandlure-baited Leggett trap, it was found 

 that the starved weevils were recovered in greater numbers than fed weevils, and 

 that starved weevils not exposed to high concentrations of the synthetic pheromone 

 were more responsive than those exposed. This suggests that food availability 

 through its effect on male boll weevil pheromone production is an important factor 

 in the male aggregating response and thir^ effect may at least in part be used to 

 explain the seasonal response pattern of male boll we'»vlls to pheromone-balted 

 traps. 



545. Lue, P. S.; Watson, J. E.; and Gilliland, F. R. , Jr. 1973. K:>ryology of 

 the boll weevil. Ann. Entomol. Soc. Am. 66: 801-C02. 



A karyotyplc study of Anthonumus grandis Boheman based on germinal and somatic 

 tissue revealed a diploid chromosome number of 22. The eleven pairs of chromo- 

 somes were classified into three morphological groups. 



546. ; Watson, J. E.; and Gillilind, F. R., Jr. 1976. Raryotypic deter- 

 minaticrh in the boil weevil. J. Hered. 67: 303-312. 



The karyotype of the boll weevil was determined to contain 11 pairs of chromosomes 

 separable into three metacentric pairs, amon^, the nine autosomal pairs; and a 

 pair of submetracentrics (X's) and another pair of acrocentrics (Y's), among the 

 ♦■he sex chromosomes pairs. Tills compound sex determining system (X,X2Y,Y~) 

 agrees with the mechanism reported for several other coleoptt rnns. 





