The bud worm, Hendecasis duplifascialis Hampsn is one of the major pests of jasmine, Jasminum sambac. The biology of budworm, H. duplifascialis was studied and found that the incubation period, total larval and pupal period were ± , ± and ± days respectively. The longevity of male and female moths was ± and ± days respectively. The total life cycle for male and female moths was found to be ± and ± days respectively. It was also observed that the longevity of female moth was longer compared to the male. | Biological study of jasmine bud worm Hendecasis duplifascialis Hampsn. Pyraustidae Lepidoptera from India