140 



the function that has been suggested for the centriole adjunct: it may anchor 

 the head to the tail. A possible abnormal condition may arise when the mito- 

 chondrial derivative rod fails to insert into the sperm nucleus. 



263. ; Childress, D.; Pomonis, G.; and Eaton, J. 197A. Boll weevil chemo- 

 sterilization by hypobarometric distillation. J. Econ. Entomol. 67: 

 278-280. 

 Hypobarometric distillation appears to be a promising technique for sterilizing 

 Anthonomus grand is Boheman because of the short exposure times. Boll weevils 

 were exposed to hempa and hempa + isopropyl methane sulfonate for times ranging 

 from 1-6 min. Males were effectively sterilized by the 2, 4, and 6 min treat- 

 ments, although some recovery of fertility was evident in the 2nd and 3rd 

 weeks posttreatment. Egg production by treated females was significantly 

 decreased and egg hatch averaged 31%. 



26A. Cast, R. T. 1966. Control of four diseases of laboratory-reared boll 



weevils. J. Econ. Entomol. 59: 793-797. 

 Four diseases of the boll weevil, Anthonomus grandis Boheman, have interfered 

 with the mass rearing of tb sect at the Boll Weevil Research Laboratory. 

 Two were caused by protozoans, one by bacteria, and one by an unidentified 

 agent. These are the first known naturally occurring diseases of the boll 

 weevil. Therapeutic control of 3 of the diseases has not been possible. The 

 bacterium has been controlled by soaking the eggs in 0.8% formaldehyde. 



265. . 1966. Oviposltion and fecundity of boll weevils in mass-rearing 



laboratory cultures. J. Econ. Entomol. 59: 173-176. 

 By using new techniques and complete mechanization to mass produce eggs 

 of the boll weevil, Anthononius grand is Boheman, more than 1 million eggs 

 per week were obtained at a cost of less than 10 cents per thousand. Of 

 9 diets tested, 2 containing soybean protein were most satisfactory. Diets, 



