188 



in dipping tests at 1 and 1.5% reduced egg laying in treated females to and 

 mortality was O.and 22%, respectively, after lA days. Hempa when fed to males 

 at 0.15 and 0.2% reduced adult emergence to and mortality was 25 and 5%, 

 respectively, after 14 days. 



364. .; Mitlin, N.; Davich, T. B. ; Nail, B. J.; and Dawson, J. R. 1975. 



Mating and sterility of male boll weevils treated with busulfan plus / 



herapa. Environ. Entomol. 4: 315-318. ". 



Male Anthonomus grandis Boheman fed 0.08% busulfan +0.4% hempa for 6 days " 



were as competitive as untreated males about 1/2 the time (occurring randomly), 

 and 1/2 the time the treated males were 1/4-1/3 as competitive as untreated 

 males. After an average of 7 matdngs, the treated males had depleted their 

 supply of sperm. Determinations of sterility based on testes examination 

 were in full agreement 91% of the time with determinations based on egg hatch 

 and adult emergence. 



365. ; Mitlin, N.; Davich, T. B.; and Sloan, C. E. 1921. Evaluation of 

 candidate chemosterilants for the boll weevil. U.S. Dep. Agric. Prod. 

 Res. Rep. 120, 24 pp. 



Iwo hundred candidate chemosterilants were tested on the boll weevil and 27 

 sterilized > 75% of the eggs collected. In all but 6 cases the mortality was > 

 30%. A 12% concentration of 1-aziridinecarboxamide, N, N'-l, 50napthylenebis-, 

 a 1.5% concentration of tretamine, and 10% concentration of urea l-(bis (1-aziridinyl) 

 phorphinyl]-3-(3, 4-dichlorophenyl) tested on mixed sexes by dipping sterilized 

 91, 93, and 100% of the eggs, respectively, and mortality was 12, 11, and 40%, 

 respectively, after 14 days. In combination teste 1% apholate + 1% piperonyl 

 butoxide, 1% Bucarpolate, or 2% carbazole sterili.-.ed 100, 86, and 94% of the 

 eggs and mortality was 30, 15, and 10%, respectively. 



/ 



