185 



356. ; Dawson, J. R.; Mitlin, N.; and Davich, T. B. 1976. Quality control 

 assessments of male sterility during the 1972 and 1973 Pilot Boll 

 Weevil Eradication Experiment. Miss. Agric.'For. Exp. Stn. Tech. Bull. 

 81, 7 pp. 



Male boll weevils were sterilized with 0.09% busulfan in 1972 and 0.09% 

 busulfan + 0.^% hempa in 1973. Sterility during 1972 averaged 95, 72, and 

 86% after 1, 2, and 3 weeks posttreatment. In 1973 sterility averaged 97, 

 87, and 88% after 1, 2, and 3 weeks, respectively. 



357. ; Dawson, J. R.; Mitlin, N. and Paulk, J. I. 1978. Sterilization 

 of the boll weevil by radioactive fumigation. J. Ga. Entomol. Soc. 



13: 3A5-350. 



85 



Krypton applied as a fumigant to the boll weevil, Anthonomus grand is Boheman, 



was capable of sterilizing the insect. Activities of 2 and 7 Curies were used 

 with the latter giving more uniform results. Both sexes could be sterilized. 



358. ; Harwalkar, M. R. ; and Mitlin. N. 1973. Quantitative studies of 

 busulfan-treated diet necessary to sterilize the male boll weevil. 

 J. Econ. Entomol. 66: 1338-1339. 



Individual weevils fed 0.1% busulfan diet for 6 days consumed 30.3±2.5 mg of 

 diet compared to 31.0±3.6 mg of food consumed by the control. Similar results 

 were obtained in 6-day mass-feeding test (50 weevils): 22.8±1.3 mg of 0.1% 

 busulfan-treated diet was consumed/weevil, vs. 23.2±1.5 mg of untreated diet 

 consumed/weevil in the control. These data agree with earlier studies where 

 33 mg of a control diet was consumed/weevil after 5 days. After 2-3 days, 

 8.5-8.8 mg of treated diet was eaten resulting in 33% egg hatch, vs. 65-73% 

 egg hatch in the control. A 4-5 day feeding of treated diet resulted in 

 further reducing the egg hatch by 25-28% over the 2 previous days. It was 

 found that 15.3 mg of treated food (50% of the total 6-day consumption) was 



A 



