171 



wing traps baited with male Anthonomus grand is Boheman, were used. Moreover, 

 adult weevils were found in only 7 of the 17 fields, and populations of boll 

 weevils did not reach economically damaging levels in any of the fields. 

 However, traps around all 34 field captured boll weevils in low to moderately 

 high numbers. The traps suppressed more than 80% of the boll weevils, with 

 traps placed around the fields in tiers, and used in conjunction with trap 

 plots treated with aldicarb giving the best results. 



328. ; McKibben, G. H.; Gueldner, R. C; Mitchell, E. B.; Tumlinson, 



J. H.; and Cross, W. H. 1972. Boll weevils in nature respond to grand- 

 lure, a synthetic pheromone. J. Econ. Entomol. 65: 97-100. 

 Both sexes of Anthonomus grandis Boheman responded in the field to a syn- 

 thetic pheromone mixture, grandlure. A wick-type formulation of grandlure 

 containing glycerol, water, polyethylene glycol, and methanol was over 80% 

 competitive as an attractant for 7 days with caged, live males fed cotton 

 squares (flower buds) once or twice a week. 



329. ; McKibben, G. H.; and Huddleston, P. M. 1975. Grandlure for boll 

 weevils: Controlled release with a laminated plastic dispenser. 



J. Econ. Entomol. 68: 477-479. 

 A new system of dispensing grandlure, the synthetic pheromone of Anthonomus 

 grandis Boheman, is composed of a S-^layer dispenser containing grandlure 

 in the inner layer. The laminated dispenser was equal in effectiveness to 

 currently used formulations and sometimes was attractive longer than 14 days. 



330. ; McKibben, G. H. ; Rummel, D. R. ; Huddleston, P. M.; and Coppedge, 

 J. R. 1974. Response of boll weevils to component ratios and doses of 

 the pheromone, grandlure. Environ. Entomol. 3: 135-138. 



Field tests of variations in concentrations of the 4 components of grandlure, 

 the pheromone of the boll weevil, Anthonomus grandis Boheman, showed that in- 



