Boll Weevils: Mechanism of Transfer of Diflubenzuron from Male to Female123

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Abstract
Data show that is unlikely that copulation is the mechanism by which diflubenzuron is transferred from male to female boll weevils. Anthonomus grandis Boheman. Males treated by feeding on diets containing diflubenzuron were unable to transfer sufficient amounts to affect the hatch of eggs from untreated females. Studies with 14-C-labeled diflubenzuron showed that 3–10% of diflubenzuron applied externally was transferred between the sexes, but the testes of treated males contained insufficient diflubenzuron to affect hatch if the material were transferred to females. Diflubenzuron is apparently transferred between the sexes by physical contact; transfer by copulation seems highly improbable.

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