Vol. 10, Issue 10 (2021)

Author(s):
Gopika R, Sonkamble MM and Bantewad SD

Abstract:
Biological studies were conducted during rabi 2020-21 at laboratory of Department of Agricultural Entomology, VNMKV, Parbhani. Study revealed that the incubation period ranged from 1 to 3 days, with a mean of 2±0.56 days. The larvae went through four instars and three moults. The mean duration of larvae from first to fourth instar were 2.2±0.41, 2.15±0.36, 2.55±0.51 and 2.9±0.78 days, respectively. From first to fourth instar, the mean length of larvae was 1.31±0.04, 2.52±0.13, 4.63±0.45 and 5.15±0.61mm, while the breadth was 0.17±0.02, 0.26±0.02, 0.42±0.04 and 0.56±0.07 mm. The duration of total larval period was 9.8±0.89 days. The pre pupal period ranging from 1 to 2 days with a mean of 1.65±0.48 days whereas, pupal period lasted for 4.4±0.50 days. Pre-oviposition, oviposition and post-oviposition period were 1.6±0.51, 7.95±1.25 and 5.6±1.17days respectively. The average fecundity of female was 161.7±9.70 egg per female. The total developmental period ranging between 25 to 30 days with mean of 27.1±1.94 days.