author(s)
Poonam Singla, Manmeet Brar Bhullar and Paramjit Kaur

abstract
The biology of brinjal shoot and fruit borer, Leucinodes orbonalis, was studied on brinjal variety Punjab Sada bahar. The different parameters of biology viz. incubation period, larval period, pupal period, oviposition, fecundity, adult longevity and sex ratio were studied during different months i.e. June, August and October. The results revealed that there was significant difference in duration of all the biological parameters during three different seasons and minimum duration of incubation period (3.19 days), larval period (11.31 days), pupal period (7.11 days) was observed during August when mean temperature and relative humidity was 29.5 ^oC and 79.25 per cent respectively. The total life span was observed to be short during August followed by June and October.