Damage to Testes and Recovery of Fertility in Boll Weevils1 Fed Chemosterilants2,3

Abstract
Studies of mating and histology were made to test the fertility and spermatogenic activity of male Anthonomus grandis Boheman (Coleoptera: Curculionidae) several weeks after the weevils were fed the following chemosterilants: apholate; busulfan (1,4-butanediol dimethanesulfonate); 1-aziridinylphosphonic acid cyclic diester with pentaerythritol; D-mannitol 1,6-dimethanesulfonate; N,N, N',N',-tetramethyl-P-piperidinophosphonic diamide; and N,N, N',N'-tetramethyl-P-morpholinophosphonic diamide with and without 2 krad of X-rays. Damage to the spermatogenic cycle and the histopathology of testes from treated weevils are described. All chemical treatments at 1 of the concentrations used caused permanent damage to the testes of some weevils as evidenced by the death of all spermatogonia. However, none of the treatments caused permanent damage to all the testes at the concentrations used. Damage to the midgut occurred with some chemosterilants. Remating studies showed that recovery of fertility could occur after 4 weeks with 5 chemosterilants, although the data for D-mannitol 1,6-dimethanesulfonate were insufficient for a firm conclusion.

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