Molecular phylogenetic analysis by maximum likelihood method of Pakistani isolate SltNPV-FSD15 strain based on nucleotide sequences with the corresponding partial late expression factor-8 (Lef-8) gene of 12 nucleopolyhydroviruses associated with S. litura (NPVs). S. litura associated NPV isolates origin and GenBank accession numbers used in the sequence analysis and phylogenetic tree construction; AY706581.1 S37 (Germany), JF276035.1 Banglore (India), AB451187.1 (AB326103.1, AB451187.1, AB583682.1 (Japan). The numbers represent bootstrap percentage values based on 1,000 replicates.