338 



mating behavior of boll weevils was observed continuously in a field where the 

 females were allowed to move freely to seek males for mating. 



659. ; Cro.ss, W. H.; McGovern, W. L.; and Dawson, E. M. 1973. Behavior of 

 the boll weevil on frego bract cotton. J. Econ. Entomol. 66: 667-680. 



In a detailed study of the behavior of Anthonomus grandis Boheman in frego bract 

 and 'Deltapine Smooth Leaf (DPSL) cotton, 2.5 times as many weevils were trap- 

 ped in or around the DPSL as around the frego bract cotton. Also, boll weevils 

 moved smoewhat more in frego than in DPSL cotton, since about 1/2 as many intro- 

 duced weevils were recovered in frego as in DPSL. In DPSL, 64% of the weevils 

 recovered were found in squares, only 20% were recovered in squares on frego 

 cotton. Both overwintered, and current-generation female weevils deposited 

 about twice as many eggs per hour in the DPSL as in the frego bract cotton. 



660. ; McGovern, W. L.; Cross, W. H.; and Mitlin, N. 1973. Boll weevils: 

 tagging for hibernation and field studies. J. Econ. Entomol. 66: 563-564. 



The purpose of the study was to develop a tagging method using a radioiso- 

 tope that would remain on or in the weevil in sufficient quantities that 

 they could be found and that would not have an adverse effect on the insect. 

 The material Zn was ultimately selected as the test isotope because of its 



availability and its half life was long enough that the weevils could be de- . 



32 

 tected for months after tagging. Later, P was used in a short-time field 



study. 



661. Mitlin, N. , and Hediu, P. A. 1974. Biosynthesis of grandlure, the 

 pheromone of the boll weevil, Anthonomus grandis , from acetate, mevalonate, 

 and glucose. J. Insect Physiol. 20: 1825-1831. 



The steam-distilled feces of adult male boll weevils, Anthonomus grandis , that 



had been injected with acetate-1 C, acetate-2 C, mevalonic acid~2''" C, or 



A4 

 glucose C(U) showed by column and gas chromatography that approximately 0.02 



