author(s)
MA Laichattiwar, RS Meena and M Raghuraman

abstract
Biology of brinjal shoot and fruit borer, Leucinodes orbonalis (Guenee), a major pest of brinjal was studied in the year 2015-2016 in the laboratory. The incubation period was 4.10±0.88 days. Length and breadth were 0.64±0.04 and 0.35±0.02 mm, respectively. The duration of 1^st, 2^nd, 3^rd, 4^th and 5^th larval instar was 1.33±0.48, 2.77±0.43, 2.56±0.72, .03±0.85 and 3.50±0.80 days, respectively. The total larval duration was 13.20±1.15 days, prepupal period 1.44±0.50 days and the pupal period 8.7±0.75 days. The full grown larvae measured 14.09±1.01 mm in length and 3.34±0.21 mm in breadth. The total developmental period was 27.43 ± 1.75 days. The adult longevity of the male and female was 3.27±0.45 days and 5.23±0.73 days, respectively. The pre-oviposition, oviposition and post oviposition periods were 1.17±0.38, 2.53±0.51 and 2.63±0.67 days, respectively. Body length of male and female was 8.54±0.90 and 11.01±0.71 mm, respectively. The fecundity was 160.2±32.42 eggs per female and the sex ratio was 1:1.40 (male to female).