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Chemosterilization of the Two-Spotted Spider Mite. II. Histopathological Effect of Apholate and 5-Fluorouracil on the Reproductive Organs1

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Histological studies reveal that the ovarian tissues in both larval and protonymphal stages of the two-spotted spider mite, Tetranychus urticae Koch, arc inactive, but this region in the deutonymphal stage shows germ-cell division. The newly emerged female adult has a well developed germarium with a few ocytes, but old adults have many ocytes and these are in the process of maturation. Females of T. urticae when exposed to a residual 2.0% treatment of apholate and 5-fluorouracil show several changes; these include a progressive degeneration of ovarian tissues and the formation of few ocytes with increasing age. Apparently apholate and 5-fluorouracil do not cause gross morphological effects on the testes of the male.

Document Type: Research Article

Publication date: April 1, 1969

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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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