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

1 August 1992

journal article
research article
Published by Oxford University Press (OUP) in Journal of Economic Entomology

Vol. 85 (4) , 1120-1124
https://doi.org/10.1093/jee/85.4.1120

Abstract

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 (PIB)/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 × 10⁶ PIB/ml), LT₅₀s were reduced from 13.9 to 7.1 d. The addition of Tinopal LPW to the virus also enhanced mortality among mature (fourth instar) larvae. The magnitude of reduction in LC₅₀s and LT₅₀S in gypsy moth larvae indicated that selected brighteners greatly enhanced the virulence of the gypsy moth NPV.

Keywords

This publication has 0 references indexed in Scilit: