author(s)
Suraj Kumar, Rajendra Singh, Awaneesh Kumar, Hari Krishna and Vinod Kumar

abstract
During the biological studies of Coccinella septempunctata (Linnaeus) under laboratory conditions on mustard aphid, Lipaphis erysimi (Kalt.). It was revealed that the egg incubation period averaged 3.33 ±0.33 days. The first, second, third and fourth grubs instars respective duration were averaged 2.33±0.33, 2.33±0.33, 3.67±0.33 and 4.67±0.33 days. The pupal period lasted for 5.67±0.33 days. Adult male and female longevity was 30.67±0.67 and 36.67±0.33 days respectively. Pre-oviposition and post-oviposition periods averaged 6.00±1.16 and 4.33±0.88 days respectively. The mean fecundity of C. septempunctata on L. erysimi were 349.67±10.11eggs/ female during her life.