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Methods of controlling blackbird damage to field corn in South Dakota
Abstract
Recent research efforts to control blackbird damage to corn in South Dakota are described. The primary species responsible is the red-winged blackbird, but other associated species include yellow-headed and Brewers blackbirds, common grackles, and brown-headed cowbirds. The birds’ biology and behavior are described, as is damage assessment in corn fields. Bird banding efforts have revealed typical bird migration patterns and movement. Trapping with Miller-type cannon nets and with modified Australian crow traps have shown success. Other damage control techniques considered, investigated, and/or evaluated include bird-resistant variety of crops, habitat management, use of frightening devices, roost sprays with the organophosphate DRC-632, and baiting with the fright-producing chemical DRC-1327.
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