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STERILANTS FOR MANAGING THE POPULATIONS OF RED-WINGED BLACKBIRDS (Agelaius phoeniceus)

1992
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Male Red-winged blackbirds (Agelaius phoeniceus) being gregarious, and causing heavy damage to corn crops in the northeast, including southern Québec and Ontario, sterilization has been studied as a mean's to manage their populations. With chemosterilants (thiotepa and Omitrol®) tested, year to year variations in reproductive success occurs. The spermatogenesis is disrupted, but the overall effect is not specific. Biosterilisation with 10.0 μg doses of GnRH-analogue hormones is more specific, and the spermatogenesis is disrupted for at least a month, but several spaced injections were required. No field trials have been done yet.

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