Vol. 12, Special Issue 12 (2023)

Author(s):
Manishkumar J Joshi, CM Muralidharan and PS Patel

Abstract:
Biology of O. tylus was carried out on date palm leaves. The egg is completely round and crystalline in color, changing to waxy yellow as it matures. The average larval period was 2.91±0.64 days, Protonymphal period was 3.02±0.59 days and deutonymphal period was 2.58±0.54 days. The average total developmental period was 15.43±1.35 days. The pre-oviposition period (1.26±0.27 days), oviposition period (7.18±0.83 days), post-oviposition period (1.19±0.27 days) and adult period for male and female (4.23±0.89 and 9.63±0.99 days, respectively). The total life period of O. tylus was (19.67±1.49 and 25.07±1.37 days) for male and female, respectively, indicating that the male was short lived as compared to female. The fecundity of O. tylus was 23.87±4.49 egg/ female. Egg hatching percentage was observed to be 87.12±5.62 and sex ratio was 1: 3.97 on date palm.