Biology and Morphometrics of Henosepilachna vigintioctopunctata (Fab.) on Brinjal

Results revealed that a single female of Henosepilachna vigintioctopunctata laid 295 to 320 eggs during the life span. Eggs were yellowish, elongated and cigar shaped, often in groups of 5 to 40. Eggs were hatched into larvae within 3 to 6 days. Newly hatched first instar larva was yellowish in colour and had six rows of long branched spines. The full grown 4^th instar grub stopped feeding and the colour of the grub gradually faint and the body shrinks. The fully fed grubs spent 1–2 days in pre-pupal stage. The pupal period lasted for 3–6 days with an average of 4.6 ± 1.01 days. The newly emerged adult was shiny yellow in colour later changed to copper brown colour mottled with black spots. Body was spherical with convex ventral surface and flat dorsal surface and gives appearance of ‘D’ when viewed from side. The average longevity of male and female was 57.2 and 60.8 days, respectively. The preoviposition, oviposition and post oviposition periods were 19.5, 24.5 and 23.00, respectively.