Abstract
Oviposition preference of two laboratory colonies of boll weevils, Anthonomus grandis grandis Boheman, was measured on day-neutral (flowering response not sensitive to daylength) progenies of primitive cottons, Gossypium hirsutum L. These day-neutral cottons carry resistance to boll weevil oviposition. Rate of oviposition was used to compare the two colonies of insects. Colony 1 has been in mass production for several years without infusion of wild types. Colony 2 has not been in mass production, and wild weevils have been introduced yearly. No significant differences in oviposition rate were found between the primitive cottons and the susceptible control, ‘Stoneville 213’, when weevils from colony 1 were used for testing. Significantly fewer eggs were laid on the primitive cottons than on the control when weevils from colony 2 were tested. The long-term mass-reared boll weevil colony did not exhibit an oviposition preference; therefore, it was not suitable for use in evaluating cotton strains for differential rates of oviposition.
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