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Variations in the Color of Eggs of the Horn Fly1,2

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Although most eggs of the horn fly, Haematobia irritans (L.), are dark brown, small numbers of tan, yellow, and white eggs also are produced. With induced oviposition, about 80% of the eggs produced in 4 hours were dark brown, and 20% were lighter in color; with natural oviposition, only a few more than 5% were light in color. Dark brown eggs were deposited first and then light-colored eggs. The percentage of fertility and the sex ratio were essentially the same for eggs of all 4 colors. Arrangement of egg colors in the ovaries was inconsistent with occasional white or yellow eggs being nearer the oviduct than were tan and brown eggs.

Document Type: Research Article

Publication date: August 1, 1966

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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