174 



males responded to females than to other males. ,i 



) . 



;J 



335. ; Mitchell, E. B.; Huddleston, P. M. ; and Davich, T. B. 1966. A I 



I 



laboratory technique for bioassay of plant attractants for the boll 



weevil. J. Econ. Entomol. 59: 240-241. 

 Progress in isolating, identifying, and field testing insect attractants 

 is dependent on reliable bioassay methods to determine the response of the 

 insects to the attractants. The "trap flask" bioassay method of demon- 

 strating the presence of an attractant in the cotton plant for the boll 



weevil, Anthonomus grandis Boheman, and of a sex attractant in the male 



/ 

 weevil for the female proved to be unpredictable and time consuming in 



our later laboratory studies with these attractants. To meet the need 



for a more reliable procedure the following new technique was developed. 



336. ; Moody, R.; Lowe, J.; and Pitts, A. 1975. Grandlure, in-field 

 traps, and insecticides in population management of the boll weevil. 

 J. Econ. Entomo. 68: 502-504. 



When grandlure was used in conjunction with in-field traps to aggregate popu- 

 lations of Anthonomus grandis Boheman in 3 diverse areas of Mississippi and 

 Alabama, ca. 6 times as many boll weevils were found in cotton near traps 

 than in cotton 100 ft or more from traps. Also, the p'Drcentage of egg-punc- 

 tured squares near traps was consistently 1.5 to 2 times higher throughout 

 the test than in cotton 100 ft from the traps. Grandlure and in-field traps 

 have potential in population management of boll weevils. 



337. ; Wilson, N. M. , Mitchell, E. B.; and Huddleston, P. M. 1971. Factors 

 affecting activity of grandlure, the pheromone of the boll weevil, in 

 laboratory bioassays. J. Econ. Entomol. 64: 1454-1456. 



In laboratory studies with grandlure mixture, the synthetic pheromone of 

 Anthonomus grandis Boheman, firebrick was the most effective carrier tested. 



