The experiment on biology of fruit borer Helicoverpa armigera (Hubner) was carried out in the Bio-control Laboratory, Department Entomology, S.V.P.U.A.&T., Meerut. Results showed that mean pre-oviposition, oviposition and post-oviposition period tomato lasted for 2.46 ± 0.29, 6.33 0.14 1.67 days, respectively. A female laid an average 329.40 68.17 eggs. incubation observed to be 3.08 0.32 d...