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The Onion Thrips on Seedling Cotton, With A Season's Record of Parthenogenetic Development*

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Infestations of the onion thrips, Thrips tabaci Lind., caused ,seedling cotton plants to grow slowly and assume a malformed condition. Buds were rarely blasted. Lateral growth sometimes resulted. Unfolding leaves had holes, marginal erosions, raised thin areas, and a crinkly surface. Using approximate figures, the average unmated female lived 14 days and laid 14 eggs in a period of eight days. Individuals developed in 14 days, nearly five days being spent in the egg, between two and three in each of the two larval instars, one and one-half in the propupa, and three in the pupa. In July a generation followed the previous one as closely as 15 days, the period lengthening to 26 days in August.

Document Type: Research Article

Publication date: August 1, 1930

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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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