■ iiw iww ia 



405 



794. , and Adkisson, P. L. 1971. A two-phased control program designed 

 for raximum suppression of the boll weevil in the High and Rolling 

 Plainj of Texas. J. Econ. Entomol. 64: 919-922. 



A hypothetical model of a 2-phase or reproductive-diapause control program 

 for Anthonjmus grandis Boheman is presented. The proposed program is de- 

 signed for maximum suppression of the boll weevil population in the High 

 and Rollin:5 Plains area of Texas. The proposed program represents a modi- 

 fication of current 2-phase programs by employing an earlier starting date, 

 based upon the ecology of the weevil in the Texas High and Rolling Plains. 

 It is suggested that this type program will be the necessary 1st phase of 

 any future boll weevil eradication effort. 



795. , and Bottrell, D. G. 1976. Relationship of overwintered boll weevil 

 response to pheromone traps and natural entry into cotton. In^ Detection 

 and Management of the Boll Weevil With Pheromone. Tex. Agric. Exp. Stn. 

 Res. Monogr. 8, pp. 26-31. 



Investigations of boll weevil, Anthonomus grandis Boheman, response to phero- 

 mone traps and trap crops were conducted in the Rolling Plains of Texas during 

 the period 1969-74. Both laboratory reared male weevils and the synthetic 

 pheromone grandlure were used as pheromone sources in the tests. Weevil re- 

 sponse patterns were similar regardless of the location of the pheromone 

 source in relation to cotton. The seasonal decline in weevil response began 

 at about the same time when the pheromone source was located adjacent to 

 cotton, in cotton, or several miles from cotton. Overwintered boll weevil 

 activity measured by pheromone traps and by actual entry of adult weevils 

 into isolated cotton plots showed different trends. Peak overwintered 

 weevil movement into cotton occurred 1 month after the peak pariod of 

 weeA^l response to traps. Therefore, pheromone trap catches in the spring 

 do not appear to provide an entirely accurate measure of oven^intered 



