186 



eaten in 4 days, resulting in 7.5% egg hatch. Control weevils ate 15.7 mg of 

 untreated diet (51% of total consumption) after 4 days, and the egg hatch was 

 57.8%. The 6-day feeding of 0.1% busulfan-treated diet (30.3 mg consumed/ 

 weevil) reduced egg hatch to 2%, vs. 72.6% egg hatch in the control. 



359. •; Hedin, P. A.; and Davich, T. B. 1966. Hempa and apholate as 

 chemosterilants for the boll weevil. J. Econ. Entomol. 59: 1014-1015. 



Concentrations of 5-50% hempa resulted in 24-76% fewer adults and 5-15% apho- 

 late dips produced 77-79% fewer adults than the control. Hempa was much less 

 toxic than apholate. 



360. ; Mattix, E.; Mitlin, N.; Borkovec, A. B.; and Lindig, 0. H. 1976. 

 New chemosterilants for boll weevils. U.S. Agric. Res. Serv. [Rep.], 

 ARS-S-131, 30 pp. 



Thirty-two of 295 compounds tested were effective chemosterilants on mixed 

 sex boll weevil groups when the compounds were fed for 3 days in an adult 

 diet. Fourteen of the 32 chemosterilants were aziridinyl compounds. When 

 the treated weevils were outcrossed to normal male and female weevils, the 

 following compounds were the most effective: N,N'-1, 5-naphthylenebis-(l- 

 aziridinecarboxamide) (ENT-50664) ; l,l'-methylenebis (aziridine) (ENT-50752); 

 P-(l-aziridinyl)-N,N,N,N'-tetramethylphosphonic diamide ENT-50991); butyl bis 

 (1-aziridinyl) phosphinate (ENT-61354); P,.P-bis (l-aziridinyl)-N-propylphos- 

 phionothioic amide (ENT-61580) ; P, P-bis (l-aziridinyl)-N-ethylphosphinothioic 

 amide (ENT-61581); bis(l-aziridinyl) ethylphosphine sulfide (ENT-61587) ; 1,9- 

 nonanediol dimethanesulfonate (ENT-26397); N-fluorne-2-ylacetohydroxamic acid 

 (ENT-50466); l-nitro-3-[ (2-pyridylmethylene) amino] guanidine (ENT-52077) ; and 

 m-(salicylideneamino) phenol (ENT-52102). 



