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resistance to malathion. Although malathion resistance was not detected in 

 the present studies, populations of boll weevils in the High Plains area, as 

 well as in other areas employing reproductive-diapause control procedures, 

 should be checked periodically to detect any cnanges in susceptibility to 

 the Insecticide. 



79. ; White, J. R.; Moody, D. S.; and Hardee, D. D. 1972. Overwintering 

 habitats of the boll weevil in the Rolling Plains of Texas. Environ. 

 Entomol. 1: 633-638. 



Collections from wing traps baited with male Anthonomus grandis Boheman 

 and from ground trash were used to study overwintering weevil populations 

 in various vegetational habitats in the Rolling Plains of Texas, 1969-71. 

 The primary overwintering habitats were "motts" of sand shinnery oak; 

 communities of woody plants dominated by such species as sand shinnery 

 oak, chinaberry, and poplar; and dense rangeland stands of mesquite. 

 Populations in hibernation varied among specific vegetational sites 

 within the habitats, and hibernating populations were concentrated 

 largely in the proxomity (<l/2 mile) of cotton fields. Major winter 

 mortality occurred within the hibernating sites during late January or 

 early February. 



80. Boyd, F. J. Jr. 1976. Boll weevil population levels during the in-season 

 and reproduction-diapause control phases of the Pilot Boll Weevil 

 Eradication Experiment. Iri Boll Weevil Suppression, Management, and 

 Elimination Technology. Proceedings of a Conf., February 13-15, 1974, 

 Memphis, Tennessee. U.S. Agric. Res. Serv. [Rep.] ARS-S-71, pp. 75-81. 



There appears to be a definite relationship between the incidence of infested 

 fields and number of boll weevils captured in pheromone traps in uhe diffe- 

 rent areas of the eradication zone in 1973. There was an increase in native 

 weevils captured and infested fields as one moved from south to north with 



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