334 



648. ; Huddleston, P. M. ; Wilson, N. M. ; and Hardee, D. D. 1973. Boll 

 weevils: relationship between time of entry into diapause and time of 

 emergence from overwintering. J. Econ. Entomol. 66: 1230-1231. 



There was a correlation between the time of entrance into hibernation and the 

 time of emergence the following spring and summer. The late-emerging weevlla 

 apparently went into diapause early, and the early emerging weevils were 

 those that were in the fields late the previous fall. 



649. ; Lloyd, E. P.; Hardee, D. D.; Cross, W. H.; and Davich, T. B. 1976. 

 In-field traps and insecticides for suppression and elimination of 

 populations of boll weevils. J. Econ. Entomol. 69: 83-88. 



Grandlure-baited in-field traps used at the rate of 10/acre captured 76% of a 

 population of overwintered Anthonomus grandis Boheman estimated to number ca. 

 25/acre that emerged between the time cotton was planted and the time the 

 plants produced pinhead squares. A combination of in-field traps and insecti- 

 cides captured or killed 100% of the emerging overwintered weevils during the 

 23 days between the pinhead square stage of plant growth (June 13) and July 6. 

 The traps alone captured ca. 96% of a late emerging population of ca. 1 

 boll weevil/acre during July 6-31. The problem of clumping of Fj^ and F, 

 progeny proved to be an important factor in the efficiency of the traps. 



650. ; Lloyd, E. P.; Wood, R. H.; and Johnson, W. L. 1977. Evaluation 

 of high density trapping alone and in combination with insecticides 

 against the boll weevil. J. Ga. Entomol. Soc. 12: 141-145. 



In-field traps baited with grandlure (the synthetic attractant of the boll 

 weevil) were tested at the rate of 20/acre between the time cotton was 

 planted and the time plants produced pinhead squares. These traps captured 

 ca. 79% of the emerging population of overvintered Anthonomus gr andis Boheman 

 determined to number ca. five/acre. A combination of the 20 in-field traps/ 



