• \, 



117 



219. ; Lambermont, E. N.; Burks, M. L. ; Slatten, B. H. ; and Bennett, A. F. 

 1967. Conversion of 6-sitosterol to cholesterol in the boll weevil and 

 inhibition of larvae development by two aza sterols. J, Econ. Entomol. 

 60: 291-293. 



The results of these analyses showed that both groups of weevils converted 

 a substantial amount of B-sitosterol to cholesterol. Diapausing weevils 

 contained more total sterol, but the percent composition was almost identical 

 for the 2 groups. Studies with C^ -cholesterol have shown that diapausing 

 weevils contain about the same amount of free sterols as reproducing weevils 

 but substantially more sterol esters. 



220. , and Leopold, R. 1975. Sterilization of the boll weevil: Vacuum 

 fumigation with hempa combined with feeding busulfan-treated diet. 

 J. Econ. Entomol. 68: 283-286. 



Vacuum fumigation of Anthonomus grand is Boheman with hempa at 0.05-0.1 mm Hg 

 at 21-23''C followed by a 4-day feeding period on diet containing 0.1% busulfan 

 consistently sterilized both sexes. Pheroraone production in males was not re- 

 duced, and 3-wk mortality was less than 40%. Young unfed weevils were very 

 susceptible to hempa as well as to the le<^hal effects of high vacuum, but 

 fepdlno format, least 1 h on 5% sucrose reduced the vacuum- induced mortality 

 without affecting sterility. Chemical analysis of weevils soon after treat- 

 ment showed residues of 498+355 yg of hempa/weevil. Prompt rinsing with 

 water removed most of the hempa from the weevils and greatly reduced the 

 sterility caused by the hempa treatment. 



