Classify silkworm in systematic way. Name two types of silkworm reared in Nepal. •Draw the external structure of a silkworm( Adult) . •Write about the external morphology of the adult silk moth.
Answers
Answer: This may help you
Explanation:
Silkworm
Kingdom:- Animalia
Sub-kingdom
Phylum:- Arthropoda
Class:- Insecta
Type:- Silkworm
Its body is white creamy and 15mm long.
Eggs:- a) Female lays 300 to 400 eggs at a time on the mulberry leaves.
b) At temperature 18°c to 25°c, eggs are hatched into larva after 10-20 days.
Larva:- a) It lives on mulberry leaves and it changes its skin four times that is called molting.
b) It wraps skill thread to its body and converted into the cocoon.
c) The silkworm needs one month to complete larva stages, etc.
Pupa:- a) It is an inactive stage of life cycle. This stage is completed in 12 to 14 days.
b) The cover of the pupa is called puparium. The pupa stage is also called Cocoon stage.
c) The cocoon is the pupa stage and it is an inactive stage. The silk is obtained from a single cocoon. We put a cocoon in warm water to kill larva present inside of a cocoon.
Advantage:-
a) Its thread is used to produce costly clothes.
b) It is used in surgery to sticking cut.
c) Improve the economic condition of the farmer.
d) It is used in phishing, etc.
Features of silk thread:-
a) The thread is proteinous, light, and strong.
b) It has a special shining.
c) It can be colored easily.
d) It absorbs water readily.
e) Silk clothes are suitable for all seasons, etc.
Explanation:
lava and mulberry are the two types of silkworm rearing in Nepal.