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Insect Morphology and SystematicsInsect Morphology and SystematicsMOULTING
(
Ecdysis
)
Ecdysis
Periodical process of shedding the old cuticle accompanied by the formation of new cuticle
is known as
moulting
or
ecdysis
. The cuticular parts discarded during moulting is known as
Exuvia
. Moulting occurs many times in an insect during the immatured stages before attaining the
adult-hood. The time interval between the two subsequent moulting is called as
Stadium
and the
form assumed by the insect in any stadium is called as
Instar
.
Steps in moulting
1. Behaviroual changes: Larva stops feeding and become inactive.
2. Changes in epidermis: In the epidermis cell size, its activity, protein content and enzyme level
increases. Cells divide miotically and increases the tension, which results in loosening of cells of
cuticle.
3. Aolysis:
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