, ^^--.^ ■---.*■■ -.>*Y -^^ -: .^— ■ jimjil II I H I p.-a-.-f.J 



148 



279. , and McCoy, C. E. 1969. The behavior of newly emerged boll weevils. 

 Ann. Entomol. Soc. Am. 62: 602-605. 



Boll weevil, Anthonomus grandis Boheman (Coleoptera: Curculionidae) , activity 

 was r€'.corded for a 48-hour period following emergence in greenhouse studies 

 and from a few hours to 4 days following emergence in field studies. Weevils 

 were observed to be active for a short time immediately after release, followed 

 by a quiescent period lasting up to 2 hours. During the initial period of 

 activity many weevils attained a host plant. Half the weevils in the green- 

 house study and all the individuals in the field study had attained a plant 

 within 4 hours after release. Morning-emerged weevils usually required less 

 time to attain a host plant than did afternoon-emerged weevils. Plant attain- 

 ment was almost always by crawling, and only a few weevils flew from the soil 

 to a host plant. Leaves were the site of initial feeding by most of the weevils 

 observed. In the greenhouse study an average time of 16.8 hours elapsed from 

 release until initial feeding. Those weevils feeding initially on leaves were 

 deterred for a considerable time in the location of and feeding upon a fruit- 

 ing structure. However, this behavior was not observed in the field. 



280. , and Rummel, D. R. 1978. The role of pheromone for boll weevil 

 detection and suppression. In Boll Weevil: Management Strategies. 



^ South. Coop. Ser. Bull. 228, pp. 84-95. 



The discovery, isolation, and identification of the male-produced boll 

 weevil aggregation pheromone and the subsequent synthesis and commcrical 

 availability of grandlure, the synthetic pheromone, has prompted both con- 

 siderable speculation and research concerning the role of the pheromone 

 phenomenon in boll weevil behavior, detection, and population management. 

 A large amount of money and other resources has been expended to develop 

 grandlure and the associated trapping technology to its present state. An 



