Studies on the biology of Corcyra cephalonica on three sesamum (Sesamum indicum) varieties viz. Smarak (white), Amrit (brown) and Prachi (black) were carried out. The mean duration of egg, larval, pupal and adult period of Corcyra cephalonica were recorded 3.67, 27.73, 7.80 and 6.80 days on variety Smarak, 5.00, 28.73, 8.73 and 7.60 days on variety Amrit and 5.80, 30.13, 10.40 and 8.40 days on variety Prachi respectively. The result of morphometric measurements revealed that the average length and breadth of egg, 1st, 2nd, 3rd, 4th, 5th instars larva, pupa were 0.41mm and 0.30 mm, 1.80mm and 0.31mm, 3.12 mm and 0.35mm, 5.60mm and 0.89mm, 7.52mm and 1.12mm, 10.01mm and 1.54mm, 8.40mm and 1.80mm respectively. The mean measurement across the expanded wings of male moth was 12.99mm and in females was 16.38mm, whereas the mean body length of male was 10.72mm and in female was 12.24mm.

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