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"
Current status of research on the blackbird-sunflower problem in North Dakota
"
Guarino, Joseph L.
Document Type
:
AL
Record Number
:
944337
Doc. No
:
LA3cr5b68d
Language of Document
:
English
Main Entry
:
Guarino, Joseph L.
Title & Author
:
Current status of research on the blackbird-sunflower problem in North Dakota [Article]\ Guarino, Joseph L.
Title of Periodical
:
Proceedings of the Vertebrate Pest Conference
Volume/ Issue Number
:
11
Date
:
1984
Abstract
:
Since 1979, the Denver Wildlife Research Center, U.S. Fish and Wildlife Service, has conducted an accelerated research program on the blackbird-sunflower problem which occurs annually in the Dakotas and Minnesota. The objective is to develop effective, cost beneficial, and environmentally safe methods for reducing blackbird damage to ripening sunflower. A multidisciplinary approach involving interrelated studies of problem definition, ecology, and control methods development is being used. Preliminary results are presented from several studies involving: state- and county-wide estimates of damage; frequency distribution and timing of damage; compensatory growth in early damaged sunflower heads; breeding male blackbird censuses; mass-marking migratory red-winged blackbirds (Agelaius phoeniceus) in spring roosts; food habits of red-wings; the chemical frightening agent, 4-aminopyridine; the avian repellent, methiocarb; decoy crops for blackbirds; frightening devices; and bird-resistant varieties of sunflower. Management strategies suggested from these studies are provided.
https://lib.clisel.com/site/catalogue/944337
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3cr5b68d_52204.pdf
3cr5b68d.pdf
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