overwintering sites. This program produced a 90 percent reduction in the fail 

 population. However, a great many weevils survived to infest the 1965 crop. 

 The 196:j program combined control of the last reproductive generation of boll 

 weevils In S*»ptember with control of potential diapauslng survivors in October 

 and November. The 1965 program proved greatly superior to the 1964 program. 

 The adult boll weevil population was reduced approximately 99 percent, and 

 several times fewer weevils survived to enter hibernation than following the 

 1964 prOi»ram. 



9. Agec, H. R. 1967. Morphology of the central nervous system of the 

 boll weevil, Anthonomus grandls (Coleoptera: Curculionidae) , and some 

 electrophysiological techniques. Ann. Entoraol. Soc. Am. 60: 779-783. 



No morphological differences in the central nervous system were noted in 

 laboratory-reared boll weevils, Anthonomus grandis Boheman, of a local strain, 

 laboratory-reared weevils of Mexican origin, and field-collected weevils. 

 Histological sections of the brain and ganglion showed that the cellular 

 elerents weire situated around the periphery; the interiors of the ganglia 

 were filled with nerve fibers. Sensory hairs on the tarsi and 7uh and 8th 

 abdominal segments are suitable sites for placement of glass micropipette 

 electrodes, and leg and genital nerve bundles are suitable for use of silver- 

 hook electrodes for electrophysiological studies of the receptors. Sharp- 

 tipped metal microelectrodes can be inserted into the compound eye to study 

 visual responses, and into the scape of the antenna to monitor sensory re- 

 sponses in the club of the antenna. 



10. and Elder, H. W. 1970. Histology of the compound eye of the boll 

 weevil, Ann. Entomol. Soc. Am. 63: 1654-1656. 



A histological study of the compound eye of the boll weevil, Anthonomus grandis 

 Boheman, with a light microscope showed that each eye is composed of about 500 

 ommatidla 100-140 y in diameter at the lens, and 7 ix la diameter at the basement 





