Author: Shapiro, Martin

Source: Journal of Economic Entomology, Volume 93, Number 3, June 2000 , pp. 572-576(5)

Publisher: Entomological Society of America

Abstract:

The nuclear polyhedrosis virus (NPV) from the beet armyworm, Spodoptera exigua (Hübner) (SeMNPV), was the most active virus tested against the beet armyworm (LC₅₀ = 4.1 PIBs/mm²), followed by nuclear polyhedrosis viruses from the alfalfa looper, Autographa californica (Speyer) (AcMNPV; LC₅₀ = 92.6 PIBs/mm²), and the celery looper, Anagrapha falcifera (Kirby) (AfMNPV; LC₅₀ = 195.7 PIBs/mm²). In the case of the nuclear polyhedrosis virus from the bollworm, Helicoverpa armigera (Hübner), LC₅₀s could only be obtained for five/six replicates, whereas LC₅₀s could only be obtained for two/six replicates for the nuclear polyhedrosis virus from the wax moth, Galleria mellonella (L.) (GmMNPV). When an optical brightener Tinopal LPW was added to virus suspensions, LC₅₀ values were reduced by 130-fold for both SeMNPV and AcMNPV and by 300-fold for AfMNPV. The addition of Tinopal LPW greatly increased the activities of HaMNPV and GmMNPV. In terms of speed of kill, Tinopal LPW reduced the LT₅₀s for all nuclear polyhedrosis viruses by 30-40%.

Keywords: Spodoptera exigua; insect viruses; optical brightener

Document Type: Research article

Publication date: 2000-06-01

More about this publication?

• 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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