98 



satisfactory for general survey. An oblique funnel trap, 4x4x6 in. is 

 preferred when trapping live weevils is desired. Both traps are baited 

 with five male weevils in small individual cages. 



181. ; Hardee, D. D.; and Nichols, F. 1967. Punch cards in attraction 

 and population studies of boll weevils. J. Econ. Entomol. 60: 484-485. 



In sexes of the boll weevil, Anthonomus grand is Boheman, a system of color 

 coding the adults has provided an efficient method of keeping sequential 

 records on individual weevils. However, when varying numbers of observa- 

 tions of marked weevils in a population were made over a period of hours 

 or days, it became progressively more difficult to locate the data sheets 

 for the individual weevils. Punch cards (5 x 8-in. Unisort Analysis Cards®) 

 divided into categories have 1 side with 5 positions that can be used to 

 color code the weevils. Thus we can rapidly find individual weevil records 

 from populations of as much as several hundred individuals. Other categories 

 on the card that allow rapid summaries of data are: sex, larval diet, re- 

 lease test number, capture test number, biological notes, feet moved, 

 attracting source, and type of response. 



182. ; Hardee, D. D.; Nichols, F.; Mitchell, H. C; Mitchell, E. B.; 

 Huddleston, P. M. ; and Tumlinson, J. H. 1969. Attraction of female 

 boll weevils to traps baited with males or extracts of males. J. Econ. 

 Entomol. 62: 154-161. 



When female Anthonomus grandis Boheman in large plots or cages were captured 

 in 12 kinds of traps, all baited with males or various extracts of males, a 

 small StikeirfS^coated plywood trap and a Plexiglas® screen funnel trap proved 

 to be the most efficient designs. Few or no females responded to empty traps 

 (controls) , and a preponderance of captured females came to the traps from 

 downwind. Thus, a wind-borne sex attractant is produced by male boll weevils, 



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