VINAYAKA K.S*, BALBIR SINGH, S S YADAV AND SUDHANSHU BALA NAYAK

Shoot and fruit borer, is one of the most destructive pests of Brinjal in India. Laboratory experiments were carried out during 2017 in the Department of Entomology, CCS Haryana Agricultural University (HAU), Hisar to study its biology, which revealed that the eggs of this species were creamy white and laid singly. The average incubation period of eggs varied from 3.74 and 4.00 days during 1 and 2 generations, respectively. There were five larval instars and the average larval duration varied from 11.50 to 12.85 days during 1 and 2 generations, respectively. The pupa was dark brown in colour, obtect and the pupal period varied from 7.61 to 7.96 days during 1 and 2 generations, respectively. The female abdomen was swollen; whereas, in the males, abdomen was cylindrical and thinner. Adult moths lived for 4.56 to 4.94 days during 1 and 2 generations, respectively. The total life cycle of L. orbonalis ranged from 27.74 to 29.78 days during 1 and 2 generations, respectively. The maximum eggs were laid during September ., 80 eggs followed by 70.80 eggs during October 2017. The maximum oviposition period was reported during September 2017 (2.57 days) followed by October (1.99 days). There was a little dominance of female moth population. Male and female ratio ranged from 1:1.6 to 1:1.80 during September and October, respectively with an average ratio of 1:1.70.