Premium
Optical brighteners as ultraviolet protectants and as enhancers in pathogenicity of Spodoptera litura (Fabricius) (Lep., Noctuidae) nucleopolyhedrovirus
Author(s) -
Monobrullah MD.,
Nagata Masao
Publication year - 2001
Publication title -
journal of applied entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0931-2048
DOI - 10.1046/j.1439-0418.2001.00570.x
Subject(s) - spodoptera litura , biology , noctuidae , bioassay , instar , spodoptera littoralis , larva , infectivity , botany , virus , veterinary medicine , virology , ecology , medicine
Seven optical brighteners were tested using diet disc bioassays in the laboratory to determine their effects on the protection and activity of Spodoptera litura (Fabricius) (Lep., Noctuidae) nucleopolyhedrovirus ( Sl MNPV) against 4th instar S. litura larvae. All brighteners tested were found to be effective UV protectants and five brighteners (Blankophor BBH, Blankophor RKH, Blankophor P167, Blankophor HRS and Tinopal LPW) enhanced viral activity by 5.53–11.08 times. Viral activity was increased with the concentration of brighteners. The time required for the virus to kill larvae was reduced by 24–27% at 1% concentration of brighteners. Some infectivity of the virus was found in the older larvae, which were resistant to Sl MNPV, by adding the brighteners. On the basis of data obtained in the present study we discuss the synergistic action of optical brighteners with Sl MNPV.