Pest has nymphal and pupal stage and also makes T-shaped mark while emerging from pupal case

Solution (By Examveda Team)

Pest has nymphal and pupal stages and also makes T-shaped marks while emerging from pupal case is Whitefly.
Whiteflies are Hemipterans that typically feed on the undersides of plant leaves. The egg is elongated, with one narrow end produced into a pedicel, which in some species is longer than the rest of the egg. After fertilization, the pedicel shrivels into a stalk.
There are seven life stages, egg, four nymphal instars, pupal stage, and adult. Females occasionally lay eggs in circles on the undersides of leaves of plants with smooth leaves. Egg laying on plants with pubescent leaves results in random placement of the eggs.