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Computation of Decrease or Increase in Filial Generations Following Insecticidal Treatment of Spodoptera littoralis1,2

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A method for computing the expected number of off-spring following insecticidal treatment was devised. Survivors of LD30 were allowed to perpetuate. The net total number of the filial generation =Pe X Ef X Nf where P.is the percentage of egg hatching, Ef is the average number of eggs per female, and Nf is the average number of emerged adult females capable of depositing fertile eggs. This method was applied to Spodoptera littoralis (Boisduval). In comparison to the control, DDT, endrin, and fenitrothion decreased the total number by 89.90, 84.29, and 22.66%, respectively, during 13successive generations, whereas carbaryl increased it by 28.84%.

Document Type: Research Article

Publication date: June 1, 1973

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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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