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Intersexes in Culicoides spp. Caused by Mermithid Parasitism in Florida1

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Abstract:

Certain mermithid nematodes have been found to parasitize 11of the most abundant soil-dwelling (as larvae) species of Culicoides in Alachua County, Florida. The parasitism results in the production of intersexual forms in C. haematopotus Malloch, C. Stellifer (Coquillet). and C. crepuscularis Malloch, the genetically intended males being altered morphologically to resemble anterior-posterior type gynandromorphs while the females are not noticeably changed. The highest percentages of parasitism based upon males captured in emergence cages and light traps varied from 30 to 90% in localized areas. The nematodes arc believed to effect a perceptible degree of natural control of Culicoides populations under favorable conditions.

Document Type: Research Article

Publication date: August 1, 1967

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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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