Vol. 11, Special Issue 9 (2022)

Author(s):
Satyam Prajapati, Manoj Kumar Tripathi and Akhtar Ali Khan

Abstract:
Biology and preying potential of C. septempunctata (Linn.) on B. brassicae (Linn.) were carried out in Entomological laboratory of T.D.P.G. College, Jaunpur (Uttar Pradesh) in during the year 2020-2021. It was observed that, incubation period, grub period of four instar, pupal period was 3.6±0.44, 15.8±1.64, 5.4±0.54 days, respectively. Longevity of female ranged from 42-45 days and male ranged from 33-37 days. The aphids consumption of adult female of C. septempunctata increased up to (56.6 aphids/day) with increased densities of test prey. Followed by IV^th instar larvae (34.7 aphids/day), adult male (31.4 aphids/day), III^rd instar larval grub (21.4 aphids/day), second instar (10.8 aphids) and first instar larval grub is (4.2 aphids/day). In During of whole life the four instar of grub, the beetle consumed 268.8±18.8 aphids whereas adult male and female consumed the 1251.50±55.28, 2398.25±78.42 aphids, respectively. C. septempunctata consumed 2093.80 aphids during its total life period from grub to adult.