Vol. 12, Issue 2 (2023)

Author(s):
Mohammed Isaq, Shivaleela, Prabhuraj A, A Hosamani and Pampanna Y

Abstract:
Cabbage (Brassica oleracea var. capitata L.) is cultivated extensively in different parts of India. However cabbage growers suffer from severe attack of headborer Hellula undalis (F.), at early stage of crop growth. Therefore, attempt was made to study the growth and development of of this noxious insect during rabi 2022 under laboratory conditions (25 °C±2 and 60% RH) at Department of Agricultural Entomology, College of Agriculture, Raichur. The results revealed that incubation period was 2.3±0.48 days. Length and breadth of egg was 0.43±0.01 mm and 0.31±0.01 mm, respectively. The duration of 1^st, 2^nd, 3^rd and 4^th larval instars was 3.3±0.48, 5.0±0.82, 5.3±0.48 and 6.2±0.68 days, respectively. The total larval duration was 19.3±2.2 days. The prepupal and pupal period was 2.4±0.516 days and 11.3±1.4 days respectively. The adult longevity of male and female was 4±0.87 days and 5.7±0.70 days, whereas the pre–oviposition, oviposition and post– oviposition periods were 2.3±0.47, 2.4±0.49 and 1.3±0.46 days, respectively. The average fecundity was 100.06±11.39 eggs/ female.