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Enhancement of Gypsy Moth (Lepidoptera: Lymantriidae) Baculovirus Activity by Optical Brighteners

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Addition of the selected optical brighteners Leucophor BS, Leucophor BSB, Phorwite AR, Phorwite RKH, and Tinopal LPW to the gypsy moth nuclear polyhedrosis virus (NPV) reduced the LC50from 18,000 polyhedral inclusion bodies (PlB)/ml to values between 10 (Phorwite RKH) and 44 (Leucophor BSB) PIB/m\. These brighteners also reduced the LT50at every virus concentration tested. At the highest virus concentration (1 x 106 PIB/ml), LT50swere reduced from 13.9 to 7.1 d. The addition ofTinopal LPW to the virus also enhanced mortality among mature (fourth instar) larvae. The magnitude of reduction in LC50s and LT50Sin gypsy moth larvae indicated that selected brighteners greatly enhanced the virulence of the gypsy moth NPV.

Document Type: Research Article

Publication date: August 1, 1992

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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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