Biology on leaf miner, Phyllocnistis citrella (Stainton) infesting sweet orange

Abstract

Investigations on biology of sweet orange leaf miner, Phyllocnistis citrella (Stainton) were carried out under laboratory condition at Department of Entomology, College of Agriculture, Junagadh Agricultural University, Junagadh during 2016-17. The average incubation period, hatching percentage, first instar, second instar, third instar, fourth instar, total larval period and pupal period of P. citrella were (2.44 ± 0.49), (74.67 ± 3.66), (1.20 ± 0.25), (1.22 ± 0.25), (2.22 ± 0.25), (2.72 ± 0.25), (7.36 ± 0.55) and (11.12 ± 0.78), respectively. The longevity of male and female moth were (4.55 ± 0.51) and (6.44 ± 0.51) days, respectively. The pre-oviposition, oviposition and post-oviposition periods of the insect were (1.18 ± 0.24), (3.22 ± 0.25) and (1.20 ± 0.25) days, respectively. The fecundity was observed to be (54.47 ± 8.89) eggs /female. Sex ratio to male: female was found to be 1: 1.2.